eBooks de Estudios generales de botánica, página 4 de 14

Esta obra apresenta condições para descrição botânica, em linguagem apropriada e precisa. Fornecerá ainda condições de realizar descrições botânicas com precisão e segurança, a partir do modelo de fi

Introdução O QUE SÃO CACTOS E SUCULENTAS? Cactos e suculentas são plantas que podem armazenar água em suas folhas e caules, o que lhes permite sobreviver em locais muito secos. Todos os cactos são su

ATTRACTIONS Succulent plants have been a feature of the horticultural scene for a long time, yet their appeal has not been dimmed by the passing years. When first brought into cultivation, their exotic appearance made them objects of great curiosity. Contemporary accounts reveal the sense of wonderment induced in the minds of those acquainted only with the familiar garden plants of the day. The first flowering of some of those early introductions was often deemed newsworthy but then, as now, the press reports were sometimes greatly distorted. Films and television have made the plants more familiar today. They are freely available from garden centres and chainstores, and one might assume that they would no longer retain their fascination. Yet one has only to watch the reaction of children at a flower show to realise that there is something elemental about the attractions of the plants. The children will pass magnificent displays of roses, chrysanthemums and the like with scarcely a glance, but very few will fail to linger in front of a display of succulent plants. What is it about these plants that appeals? It is usually cacti that make the initial impact. Their appearance is so different from that of other plants that attention is drawn to them. Instead of slender leafy stems, the majority of cacti have swollen stems with spines taking the place of leaves. The association of the plants with a struggle for life in a hostile environment enhances their appeal. The climax comes when the first flowering cactus is seen. Cactus flowers have a delicate beauty which contrasts with the stark appearance of the plants, and they are often brightly coloured. The range of forms among the cacti is considerable. Hollywood has made everyone familiar with the columnar organ pipe and flat-padded prickly pear types, but there are also cacti with globular bodies and many which offset to form mounds of clustering stems. In size they range from tiny plants with bodies less that in (1cm) in diameter to giants 40ft (12m) or more in height. In addition to the cacti, many other plants have evolved to survive in arid regions. Some have an appearance superficially similar to that of the cacti, with fleshy stems and an absence of leaves. Some are rosette plants with fleshy leaves, while others compromise by having stout moisture-retaining stems and deciduous non-fleshy leaves. The variety of forms among these is even greater than among the cacti. Add the fact that many of the leaves are of delicate pastel colours, or covered with a powdery farina, or clad with soft hairs just appealing to be stroked, and one can understand why people find it difficult to resist touching the plants. The exotic appearance of these plants might lead the uninitiated to think that they are difficult to cultivate. This is not the case: they are among the easiest of plants to grow. Apart from a small number, which are best avoided until experience has been gained by growing a variety of types, cacti and succulents are undemanding in their requirements. Given a porous compost, a position in good light, moderate watering and enough warmth to maintain a temperature just above freezing point, the majority can be expected not only to survive but to flourish and flower. It is possible to grow fine specimens on a windowsill, though a greenhouse makes life easier for the plants and their owner. Having evolved to cope with the rigours of a harsh natural environment, the plants are forgiving of neglect. A plant that can survive months of drought in the wild will not take exception to lack of watering while its owner is away on holiday.

The Great Wood of Caledon the historic native forest of Highland Scotland has a reputation as potent and misleading as the wolves that ruled it. The popular image is of an impassable, sun-snuffing shroud, a Highlandswide jungle infested by wolf, lynx, bear, beaver, wild white cattle, wild boar, and wilder painted men. Jim Crumley shines a light into the darker corners of the Great Wood, to re-evaluate some of the questionable elements of its reputation, and to assess the possibilities of its partial resurrection into something like a national forest. The book threads a path among relict strongholds of native woodland, beginning with a soliloquy by the Fortingall Yew, the one tree in Scotland that can say of the hey-day of the Great Wood 5,000 years ago: I was there. The journey is enriched by vivid wildlife encounters, a passionate and poetic account that binds the slow dereliction of the past to an optimistic future.

Este ensayo transita a lo largo de cinco siglos de descubrimientos en el mundo vegetal a través de las extraordinarias vidas de naturalistas, genetistas y botánicos apasionados por las plantas, los árboles, la agricultura y la genetica. Por ejemplo, Charles Darwin, que identifico una especie de mariposa que solo podia polinizar un tipo de orquidea. O Leonardo da Vinci, que se dedico a estudiar la filotaxis, la disposicion de las hojas en el tallo de una planta para captar la luz del sol. Y como no mencionar la tragica historia del genetista ruso Nikolai Ivanovich Vavilov, que aislo en su laboratorio el supergrano de trigo que alimentaria a millones de campesinos solo para caer victima de las purgas de Stalin y morir en una de sus prisiones. Stefano Mancuso tambien relata la increible vida de George Washington Carver, el primer estadounidense negro graduado en Agricultura, que invento un metodo revolucionario para cultivar cacahuetes. Se nos presenta tambien la vida de Charles Harrison Blackley que, arriesgando su propia existencia, descubrio los origenes de la fiebre del heno. Se incluyen muchos otros cientificos que cambiaron nuestras ideas sobre el universo en que vivimos, que completan un relato de los descubrimientos mas asombrosos y a veces desconocidos del mundo vegetal.

_____ Fungi are not like us - they are entirely, magically, something else.A lyrical, fascinating exploration of this weird organismScottish FieldA memoir oozing with wonder Waterstones.comWelcome to the astonishing secret world of fungi_____Fungi can appear anywhere, from desert dunes to frozen tundra. They can invade our bodies and thoughts; live between our toes or our floorboards; they are unwelcome intruders or vastly expensive treats; symbols of both death and eternal life. But despite their familiar presence, theres still much to learn about the eruption, growth and decay of their interconnected world.Aliya Whiteley has always been in love with fungi - from a childhood taking blurry photographs of strange fungal eruptions on Exmoor to a career as a writer inspired by their surreal and alien beauty. This love for fungi is a love for life, from single-cell spores to the largest living organism on the planet; a story stretching from Aliyas lawn into orbit and back again via every continent.From fields, feasts and fairy rings to death caps, puffballs and ambrosia beetles, this is an intoxicating journey into the life of extraordinary organism, one that we have barely begun to understand._____A short charming guide to all things shroomy, stretching from the authors lawn, into orbit and back again, via every continentGardens IllustratedUtterly delightfulPlantlifeAccessible, inviting and revelatory... Aliya Whiteley animates the hidden world of fungi in prose as rich and beautiful as the strange organisms she turns her attention to. Alice Tarbuck, author of A Spell in the Wild

Los árboles parecen estar callados en nuestro jardín, pero no es así. Los robles, los manzanos no se comunican únicamente entre ellos, sino que también lo hacen con nosotros, sólo que para comprenderlos, debemos aprender su lengua. Si sabemos que tal anda un arbol y detectamos, por su manera de crecer y por el estado de las hojas o de la corteza, como se encuentra, nos dara muchas alegrias. El guarda forestal Peter Wohlleben ofrece en este libro detalles sorprendentes sobre los sentimientos de los arboles y nos ayuda a observarlos desde una nueva perspectiva. El conocimiento de la manera de ser y de los nexos ecologicos facilita el cuidado natural de los arboles. Los consejos de este experto nos ayudaran a elegir el arbol adecuado para nuestro jardin, a plantarlo y podarlo, o a tratar a arboles enfermos y viejos.n libro para todas las personas que aman los arboles y desean cuidarlos desde la raiz hasta la copa.

"Este não é um livro sobre como podemos salvar as árvores. É um livro sobre como as árvores podem nos salvar."Da aclamada ecologista e pesquisadora Suzanne Simard — que revolucionou a nova ciência da

In ancient Ireland there were 365 different parts to the body, and a different plant to cure each part. So the wild plants of Ireland are bound up in our culture and folklore from the earliest times. To arry a four-leaved shamrock brings luck in gambling, while putting nine ivy leaves under her pillow means a girl will dream of her future husband. Here plants are described in seasonal order, a perspective dating back to our ancestors. Different aspects of plant folklore are examined following a brief history of traditional herbal medicine in Ireland. Included are their roles in magical protection, in charms and spells (especially for love!), as emblems in childrens games, and in Irish place names.

Name the five Great Trees of Ireland? What trees are most often found beside holy wells or cemeteries? Which tree gave the Red Branch Knights of Ulster their name? Ireland was once so heavily wooded it was said a squirrel could travel from Cork to Killarney without touching the ground. So it is no surprise that, in ancient Ireland, mythology and folklore were a part of the peoples general knowledge about trees. Many of the myths and legends and much of the folklore associated with native trees persists to this day and are gathered together in this book.

Del inabarcable reino de la flora, los árboles son uno de los seres vivos más presentes en la cultura humana y, sin embargo, están todavía lejos de revelar todos sus misterios y secretos. Son seres bellos, ingeniosos, de enorme envergadura e increiblemente capaces de ocupar el espacio, salir de cualquier situacion dificil y resistirse a la voluntad de control del hombre. No molestan y viven mas que cualquier otro ser vivo.Francis Halle, cientifico de renombre internacional y descubridor de la "arquitectura botanica", no solo posee la ciencia de los arboles, sino que ha sabido transmitir como nadie toda su pasion por estos prodigios de la naturaleza. Entender el reino vegetal, afirma el ecologista frances, requiere una "revolucion intelectual" y hoy, mas que nunca, es una emergencia. Este libro, una conferencia de Halle que nos introduce en los secretos y la alteridad de los arboles, es una pequeña contribucion a ello.

Un reportaje de investigación que se lee como una novela negra.Más allá del esplendor de los chefs estrella y los restaurantes de prestigio, la cadena de suministro de la trufa está marcada por los robos, el secretismo, los sabotajes y los fraudes. Los campesinos patrullan sus campos armados con rifles y temen que los espias puedan robarles los secretos del negocio; los cazadores esconden pedazos de carne envenenados para librarse de los perros truferos, mientras que compradores ingenuos y expertos reconocidos por igual sufren los engaños de timadores y falsificadores.Ryan Jacobs empezo esta historia como un articulo para The Atlantic, pero ha conseguido divulgar de un modo novelesco los delitos, en ocasiones incluso de sangre, que tienen lugar en todas las etapas del camino que recorre la trufa para llegar desde la tierra al plato.

Los Árboles Maestros son aquellas especies a las que se dirigían nuestros antepasados para honrarlos y admirarlos, y con la práctica sintonizaban con la conciencia de estos mismos árboles. De esta manera el ser humano accedia al conocimiento y a una informacion sutil que le facilitaba vivir de una manera mas armonica y de acuerdo con las leyes de la Naturaleza. Elena Garcia Alonso ha recuperado este conocimiento ancestral y lo comparte contigo en La Sonrisa de los Arboles. Cada especie arborea encarna una cualidad necesaria para el hombre. Cuando un Arbol Maestro nos recuerda una de estas cualidades hace que nunca mas nos sintamos solos y recuperemos la armonia, la paz, la inocencia y la felicidad que hemos olvidado. Este libro te enseña a reconocer y experimentar las doce cualidades de los doce Arboles Maestros, que van a convertrse en tus mas fieles compañeros.

Una obra que recoge toda la complejidad, belleza y misterio que caracterizan el desconocido mundo de las plantas. Se ha convertido en un vegetal, solemos decir para referirnos a un ser inerte carente de toda capacidad para interaccionar con el exterior. Nada mas lejos de la realidad, aunque algunos vean a las plantas como simples materiales pasivos e insensibles que ornamentan parques y jardines, lo cierto es que el mundo vegetal no pueden ser mas complejo, dinamico y sensitivo. Las plantas estan continuamente interaccionando con un entorno cambiante, poseen una gigantesca diversidad de comportamientos, y han desarrollado las mas sorprendentes adaptaciones, que les han permitido colonizar todos los ecosistemas de este planeta. A traves de las paginas de este del libro descubriremos el complejo universo vegetal, porque las plantas aunque no sea cierto que se emocionen con la musica clasica, ni sientan dolor, ni empatia y en muchos aspectos poco tengan que ver con las experiencias y los sentimientos humanos, conforman un grupo de seres extraordinarios que observan y se comunican, capaces de recordar acontecimientos, engañar, defenderse de sus depredadores, adaptarse a las condiciones ambientales mas extremas, asociarse con todo tipo de organismos, cazar animales y aprovecharse, como el mas avezado gorron, de sus congeneres.

Una historia cultural de las plantas desde el cultivo y la domesticación hasta la estética, la sexualidad y lo sagrado.Los seres humanos le damos un uso práctico a los vegetales desde hace miles de años. Nos sirven de alimento y de medicina, los utilizamos en la construccion y en los tejidos Pero estamos ligados a ellos a niveles mas profundos. La primera gran revolucion que vivimos la cultural se produjo cuando plantamos el primer grano de maiz, y hemos sabido crear belleza a traves de los jardines. Al mismo tiempo no podemos olvidar las luchas de poder originadas por flores, asi como la dimension religiosa que ciertas culturas han encontrado en los arboles y las plantas.Uniendo ciencia y tradicion, Aina S. Erice se adentra en nuestra relacion con el mundo vegetal y nos regala un libro unico. Nos desvela misterios de la historia, compara la mentalidad de distintas civilizaciones y, cuando son necesarios, nos deslumbra con datos cientificos. Un canto a la naturaleza marcado por la sabiduria y el respeto.

How to Start a Vegetable Garden: Easy Steps for Beginners offers a comprehensive introduction to the world of vegetable gardening, especially for those new to gardening. At a time when self-sufficiency and environmental awareness are becoming increasingly important, this book serves as a valuable resource for anyone interested in healthy eating and sustainable practices. It guides readers through essential topics such as site selection, soil preparation, and plant selection and care. The clearly structured, step-by-step instructions are designed to be easy to understand and encourage active participation. Given the growing interest in urban gardening, it demonstrates how to create a home garden even in limited space. It also examines historical perspectives on gardening and highlights their relevance in the modern world. The practical approach includes numerous tips for avoiding common mistakes as well as information on environmentally friendly growing methods that are not only sustainable but can also lead to higher yields.

Se trata de una colección de 100 flores fantásticas, al modo de los "Bestiarios" medievales, con sus respectivos nombres científicos, descripción de características, propiedades, modos de activación e con textos de Claudia Bertini e ilustraciones realizadas en collage con tecnica digital por Patrizia Bertini. La coleccion ofrece la posibilidad de jugar con sus paginas; es decir, se puede elegir al azar,clickeando el indice, cualquiera de estas flores; la lectura de sus caracteristicas y propiedades las transformara en una suerte de pronostico y quizas de buena ventura. Original en español traducido al ingles y al italiano.------------------------------------------------------------------------------------------------------------------------------------------------------------This is a collection of 100 fantasy flowers, in the manner of medieval "Bestiaries", with their respective scientific names, description of characteristics, properties, modes of activation, with texts by Claudia Bertini and illustrations made with a digital collage technique by Patrizia B ertini . The collection offers the possibility of playing with its pages; that is to say, you can choose at random, by clicking the index, any of these flowers; reading its characteristics and properties will transform them into a kind of prognosis and perhaps a good fortune. Original in Spanish, translated into English and Italian.----------------------------------------------------------------------------------------------------------------------------------------------------------Si tratta di una raccolta di 100 fiori fantastici, alla maniera dei "Bestiari" medievali, con i rispettivi nomi scientifici, descrizione delle caratteristiche, proprieta, modalita di attivazione, con testi di Claudia Bertini e illustrazioni realizzate in collage con tecnica digitale da Patrizia Bertini. La raccolta offre la possibilita di giocare con le sue pagine; vale a dire, puoi scegliere a caso, cliccando sullindice, uno qualsiasi di questi fiori; leggerne le caratteristiche e le proprieta le trasformera in una sorta di prognosi e forse di fortuna. Originale in spagnolo tradotto in inglese e italiano.

Esta obra deliciosamente diseñada e ilustrada, y rebosante de asombrosa información, cautivará a cualquier amante de la naturaleza. Un manual de referencia accesible y entretenido sobre el mundo arboreo. El conocimiento de expertos en la materia se conjuga con los dibujos artisticos originales y fotografias en color para concentrar toda la esencia de los bosques de nuestro planeta en un frasco pequeño y exquisito. Anatomia y arquitectura de los arboles, diversidad de especies, dinamicas de los bosques, desafios de la conservacion, hechos curiosos, mitos, folclore y cultura popular...Una irresistible guia sobre la asombrosa vida de los arboles.

The Purple loosestrife (Lythrum salicaria) is a controversial plant, regarded both as a Friend and a Foe. In Europe, where the plant is native and commonly found in wetland landscapes, its beautiful purple flowers are admired both in nature and when introduced into gardens. However, in North America, where the plant was introduced by immigrants in the early 1800s, L. salicaria has become a pest, conquering vast areas and displacing native plants.The exceptional success of the newcomer in the New World is primarily attributed to its escape from natural enemies. In the original habitats, the purple loosestrife is controlled and kept in check by plant-eating insects, especially beetles. In America, the alien plant can flourish, and the resources spared from defence are invested in extra growth and reproduction. As a result, the purple loosestrife now occupies all the US states except Florida.Besides the escape of enemies, the purple loosestrife has merits of its own. Hybridization between plants from various origins results in new genomes, enhancing the vitality of the alien.The purple loosestrife tolerates harsh environmental conditions, including dryness and flooding. On the warming planet, the species is one of the beneficiaries of climate change.The newcomer is an undeniable competitive stress factor for native biota. However, the long-term ecological impacts of the purple loosestrife may be relatively minor. In several regions, it has become an established part of wetlands. The abundant riches the flowers provide are a priceless gift for pollinating insects, benefiting agriculture during dry seasons. The purple loosestrife plant is valuable in providing compounds used in medical preparations.Although the purple loosestrife is not an agricultural weed, due to its damage to natural biota, the plant is included in the list of the 100 most deleterious alien organisms in the world. Besides the Americas, the plant has now been established - and is considered a worrisome alien - in Africa and Oceania.

Belém do Pará, a Metrópole da Amazônia, convida você a uma jornada inesquecível por seus encantos históricos, culturais e naturais. Este guia foi cuidadosamente elaborado para apresentar roteiros tur