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Urtica Urentivelutina
''Urtica urentivelutina'' is a species of the genus ''Urtica'' (often referred to as nettles), found in Peru. This species is closely related to ''Urtica macbridei, U. macbridei'', but differs in its much denser and longer wikt:indument, indument, especially on the stipules (glabrousness (botany), subglabrous in ''U. macbridei'') and the presence of stinging hairs on the wikt:perigon, perigon of the female flowers. The leaves are densely wikt:pubescent, pubescent and also irregularly wikt:bullate, bullate between the veins, which is a character not found in other Peruvian species. Description Its liana is tall from a ligneous rhizome approximately thick. Its stems are lax, with scattered stinging hairs between long and with a dense, white cover of simple trichomes long. Leaves are opposite, with interpetiolar stipules united in pairs but deeply incised, and completely covered with white simple trichomes appromately in length. petiole (botany), Petioles are long, and their cy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Urtica
''Urtica'' is a genus of flowering plants in the family Urticaceae. Many species have stinging hairs and may be called nettles or stinging nettles (the latter name applying particularly to ''Urtica dioica, U. dioica''). The generic name ''Urtica'' derives from the Latin for 'sting'. Due to the stinging hairs, ''Urtica'' are rarely eaten by herbivores, but provide shelter for insects. The fiber has historically been used by humans, and cooking preparations exist. Description ''Urtica'' species grow as annual plant, annuals or perennial herbaceous plants, rarely shrubs. They can reach, depending on the type, location and nutrient status, a height of . The perennial species have underground rhizomes. The green parts have stinging hairs. Their often quadrangular stems are unbranched or branched, erect, ascending or spreading. Most leaves and stalks are arranged across Alternate leaf, opposite sides of the stem. The leaf blades are elliptic, lanceolate, ovate or circular. The leaf bl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trichome
Trichomes (; ) are fine outgrowths or appendages on plants, algae, lichens, and certain protists. They are of diverse structure and function. Examples are hairs, glandular hairs, scales, and papillae. A covering of any kind of hair on a plant is an indumentum, and the surface bearing them is said to be Leaf#Surface, pubescent. Algal trichomes Certain, usually filamentous, algae have the terminal cell (biology), cell produced into an elongate hair-like structure called a trichome. The same term is applied to such structures in some cyanobacteria, such as ''Spirulina (dietary supplement), Spirulina'' and ''Oscillatoria''. The trichomes of cyanobacteria may be unsheathed, as in ''Oscillatoria'', or sheathed, as in ''Calothrix''. These structures play an important role in preventing soil erosion, particularly in cold desert climates. The filamentous sheaths form a persistent sticky network that helps maintain soil structure. Plant trichomes Plant trichomes have many diff ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cloud Forest
A cloud forest, also called a water forest, primas forest, or tropical montane cloud forest, is a generally tropical or subtropical, evergreen, Montane forest, montane, Tropical and subtropical moist broadleaf forests, moist forest characterized by a persistent, frequent or seasonal low-level cloud cover, usually at the canopy level, formally described in the ''International Cloud Atlas'' (2017) as silvagenitus. Cloud forests often exhibit an abundance of mosses covering the ground and vegetation, in which case they are also referred to as mossy forests. Mossy forests usually develop on the mountain pass, saddles of mountains, where moisture introduced by settling clouds is more effectively retained. Cloud forests are among the most biodiversity-rich ecosystems in the world, with a large number of species directly or indirectly depending on them. Other moss forests include black spruce/feathermoss Climax community, climax forest, with a moderately dense canopy and a forest fl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
La Libertad Region
La Libertad (; in English language, English: ''The Liberty'') is a Regions of Peru, department and Regional Government of La Libertad, region in northwestern Peru. Formerly it was known as the Department of La Libertad ('). It is bordered by the Lambayeque Region, Lambayeque, Cajamarca Region, Cajamarca and Amazonas (Peruvian department), Amazonas regions on the north, the San Martín Region on the east, the Ancash Region, Ancash and Huánuco Region, Huánuco regions on the south and the Pacific Ocean on the west. Its capital is Trujillo, Peru, Trujillo, which is the nation's third biggest city. The region's main port is Salaverry, one of Peru's largest ports. The name of the region is Spanish for "freedom" or "liberty"; it was named in honor of the Intendancy of Trujillo's proclaiming independence from Spain in 1820 and fighting for that. It is the ninth smallest department in Peru, but it is also its second-most populous department after Department of Piura, Piura and its second-m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sánchez Carrión Province
Sánchez is a Spanish family name. Historical origins "The illustrious Sanchez Family... is descended from one of a number of Gothic knights (caballeros) who in the year 714 escaped from the ‘barbara furia’ of the Mohammedan invasion and took up their residence in the hills of Leon, Galicia, Asturia, Burgos, and the Pyrenees. They took part under the Gothic king of the Asturias Pelayo (Pelagius), in the battle of Covadonga (730?) against the Mohammedans, and then returned to the Pyrenees where they elected as their leader Don Garcia Ximenez. From here they passed down into Navarre and Aragon..." In the 8th century, Duke Lupus Sanchez assisted the first Holy Roman Emperor, Charlemagne, in capturing the fortress city of Barcelona from the Muslims. Duke Lupus Sanchez commanded military assets comparable to or greater than those of Alfred the Great of Wessex (England) and was able to mobilize a militia of 27,000 or more to garrison the fortress cities of Gascony. There were ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apex (botany)
In cell biology, the meristem is a structure composed of specialized tissue found in plants, consisting of stem cells, known as meristematic cells, which are undifferentiated cells capable of continuous cellular division. These meristematic cells play a fundamental role in plant growth, regeneration, and acclimatization, as they serve as the source of all differentiated plant tissues and organs. They contribute to the formation of structures such as fruits, leaves, and seeds, as well as supportive tissues like stems and roots. Meristematic cells are totipotent, meaning they have the ability to differentiate into any plant cell type. As they divide, they generate new cells, some of which remain meristematic cells while others differentiate into specialized cells that typically lose the ability to divide or produce new cell types. Due to their active division and undifferentiated nature, meristematic cells form the foundation for the formation of new plant organs and the cont ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unisexual
Dioecy ( ; ; adj. dioecious, ) is a characteristic of certain species that have distinct unisexual individuals, each producing either male or female gametes, either directly (in animals) or indirectly (in seed plants). Dioecious reproduction is biparental reproduction. Dioecy has costs, since only the female part of the population directly produces offspring. It is one method for excluding self-fertilization and promoting allogamy (outcrossing), and thus tends to reduce the expression of recessive deleterious mutations present in a population. Plants have several other methods of preventing self-fertilization including, for example, dichogamy, herkogamy, and self-incompatibility. In zoology In zoology, dioecy means that an animal is either male or female, in which case the synonym gonochory is more often used. Most animal species are gonochoric, almost all vertebrate species are gonochoric, and all bird and mammal species are gonochoric. Dioecy may also describe colonies ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inflorescence
In botany, an inflorescence is a group or cluster of flowers arranged on a plant's Plant stem, stem that is composed of a main branch or a system of branches. An inflorescence is categorized on the basis of the arrangement of flowers on a main axis (Peduncle (botany), peduncle) and by the timing of its flowering (determinate and indeterminate). Morphology (biology), Morphologically, an inflorescence is the modified part of the Shoot (botany), shoot of spermatophyte, seed plants where flowers are formed on the axis of a plant. The modifications can involve the length and the nature of the internode (botany), internodes and the phyllotaxis, as well as variations in the proportions, compressions, swellings, adnations, connations and reduction of main and secondary axes. One can also define an inflorescence as the reproductive portion of a plant that bears a cluster of flowers in a specific pattern. General characteristics Inflorescences are described by many different charact ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cystolith
Cystolith (Gr. "cavity" and "stone") is a botanical term for outgrowths of the epidermal cell wall, usually of calcium carbonate but sometimes of silicon dioxide also, formed in a cellulose matrix in special cell (biology), cells called lithocysts, generally in the leaf of plants. Cystoliths are present in certain Family (biology), families, including in many Genus, genera of Acanthaceae. Plants in the family Urticaceae, known as stinging nettles, also form leaf cystoliths, but only during their later flowering and seed setting stages. Other examples include Cannabis and other plants in the family Cannabaceae, which produce leaf and flower cystoliths, and ''Ficus elastica'', the Indian rubber plant of the family Moraceae. From a 1987 article on cystolith development and structure: References Cell anatomy Plant anatomy {{botany-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petiole (botany)
In botany, the petiole () is the stalk that attaches the leaf blade to the Plant stem, stem. It is able to twist the leaf to face the sun, producing a characteristic foliage arrangement (spacing of blades), and also optimizing its exposure to sunlight. Outgrowths appearing on each side of the petiole in some species are called stipules. The terms wikt:petiolate, petiolate and wikt:apetiolate, apetiolate are applied respectively to leaves with and without petioles. Description The petiole is a stalk that attaches a leaf to the plant stem. In petiolate leaves the leaf stalk may be long (as in the leaves of celery and rhubarb), or short (for example basil). When completely absent, the blade attaches directly to the stem and is said to be Sessility (botany), sessile or apetiolate. Subpetiolate leaves have an extremely short petiole, and may appear sessile. The broomrape family Orobanchaceae is an example of a family in which the leaves are always sessile. In some other plant group ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhizome
In botany and dendrology, a rhizome ( ) is a modified subterranean plant stem that sends out roots and Shoot (botany), shoots from its Node (botany), nodes. Rhizomes are also called creeping rootstalks or just rootstalks. Rhizomes develop from axillary buds and grow horizontally. The rhizome also retains the ability to allow new shoots to grow upwards. A rhizome is the main stem of the plant that runs typically underground and horizontally to the soil surface. Rhizomes have nodes and internodes and auxiliary buds. Roots do not have nodes and internodes and have a root cap terminating their ends. In general, rhizomes have short internodes, send out roots from the bottom of the nodes, and generate new upward-growing shoots from the top of the nodes. A stolon is similar to a rhizome, but stolon sprouts from an existing stem having long internodes and generating new shoots at the ends, they are often also called runners such as in the strawberry plant. A stem tuber is a thickene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
