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Guizotia Jacksonii
''Guizotia jacksonii'' is a low, creeping, perennial plant with ovate leaves and yellow flowerheads belonging to the family Asteraceae. This species is endemic to Kenya, and grows in along roads and other open treaded places in the forest zones the central highlands of Kenya. Taxonomy In 1902, Spencer Le Marchant Moore was the first to describe this species of sunfleck as ''Coreopsis jacksonii'', based on a specimen collected by Frederick John Jackson from the Kiambu County in Kenya in 1899. John Hutchinson assigned a plant collected by Battiscombe from the Aberdare Range in Nyandarua County to the genus ''Guizotia'' and called it ''G. reptans''. Earl Edward Sherff described in 1923 a plant from the western slopes of Mount Kenya, found by Mearns, as ''Bidens spathulata''. By 1926 he had realised it was identical to Moore's species, but as he thought it better placed in ''Bidens'', he made the new combination ''B. jacksonii''. Robert Elias Fries collected a slightly different sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perennial Plant
A perennial plant or simply perennial is a plant that lives more than two years. The term ('' per-'' + '' -ennial'', "through the years") is often used to differentiate a plant from shorter-lived annuals and biennials. The term is also widely used to distinguish plants with little or no woody growth (secondary growth in girth) from trees and shrubs, which are also technically perennials. Perennialsespecially small flowering plantsthat grow and bloom over the spring and summer, die back every autumn and winter, and then return in the spring from their rootstock or other overwintering structure, are known as herbaceous perennials. However, depending on the rigours of local climate (temperature, moisture, organic content in the soil, microorganisms), a plant that is a perennial in its native habitat, or in a milder garden, may be treated by a gardener as an annual and planted out every year, from seed, from cuttings, or from divisions. Tomato vines, for example, live several y ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clumping (biology)
Clumping is a behavior in an organism, usually sessile, in which individuals of a particular species group close to one another for beneficial purposes. Clumping can be caused by the abiotic environment surrounding an organism. Barnacles, for example, group together on rocks that are exposed for the least amount of time during the low tide. Usually, clumping in sessile animals starts when one organism binds to a hard substrate, such as rock, and other members of the same species attach themselves afterwards. Herbivorous snails are known to clump around where sufficient algae are present. The clumping of mussels (shown right) has been found to be influenced by competition with other species. The mussels attach themselves by byssal threads to potential competitors for space. Causes Predation avoidance Clumping and increased locomotion has been found to occur with organisms such as blue mussels ( ''Mytilus edulis'') due to risks from predators such as the European lobster (''Homaru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plants Described In 1902
Plants are predominantly photosynthetic eukaryotes of the kingdom Plantae. Historically, the plant kingdom encompassed all living things that were not animals, and included algae and fungi; however, all current definitions of Plantae exclude the fungi and some algae, as well as the prokaryotes (the archaea and bacteria). By one definition, plants form the clade Viridiplantae (Latin name for "green plants") which is sister of the Glaucophyta, and consists of the green algae and Embryophyta (land plants). The latter includes the flowering plants, conifers and other gymnosperms, ferns and their allies, hornworts, liverworts, and mosses. Most plants are multicellular organisms. Green plants obtain most of their energy from sunlight via photosynthesis by primary chloroplasts that are derived from endosymbiosis with cyanobacteria. Their chloroplasts contain chlorophylls a and b, which gives them their green color. Some plants are parasitic or mycotrophic and have lost the ability ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Millerieae
Millerieae is a tribe of flowering plants belonging to the Asteroideae subfamily. Of all the genera, only ''Galinsoga'', ''Guizotia'', and ''Sigesbeckia'' have species native to the Old World. Subtribes and genera Millerieae subtribes and genera recognized by the Global Compositae Database as of April 2022: *Subtribe Desmanthodiinae **'' Desmanthodium'' *Subtribe Dyscritothamninae **''Dyscritothamnus'' *Subtribe Espeletiinae **''Espeletia'' **''Ichthyothere'' **'' Smallanthus'' **''Tamananthus'' *Subtribe Galinsoginae **'' Alepidocline'' **'' Alloispermum'' **'' Aphanactis'' **''Bebbia'' **''Cymophora'' **''Faxonia'' **''Freya (plant), Freya'' **''Galinsoga'' **''Oteiza (plant), Oteiza'' **''Sabazia'' **''Schistocarpha'' **''Selloa'' **''Tridax'' *Subtribe Guardiola (plant), Guardiolinae **''Guardiola (plant), Guardiola'' *Subtribe Jaegeriinae **''Jaegeria'' *Subtribe Melampodiinae **''Acanthospermum'' **''Lecocarpus'' **''Melampodium'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Kenya
Mount Kenya (Kikuyu: ''Kĩrĩnyaga'', Kamba, ''Ki Nyaa'') is the highest mountain in Kenya and the second-highest in Africa, after Kilimanjaro. The highest peaks of the mountain are Batian (), Nelion () and Point Lenana (). Mount Kenya is located in the former Eastern and Central provinces of Kenya; its peak is now the intersection of Meru, Embu, Laikipia, Kirinyaga, Nyeri and Tharaka Nithi counties, about south of the equator, around north-northeast of the capital Nairobi. Mount Kenya is the source of the name of the Republic of Kenya. Mount Kenya is a volcano created approximately 3 million years after the opening of the East African Rift. Before glaciation, it was high. It was covered by an ice cap for thousands of years. This has resulted in very eroded slopes and numerous valleys radiating from the peak. There are currently 11 small glaciers, which are shrinking rapidly, and may disappear by 2050. The forested slopes are an important source of water for much of Keny ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mau Forest
Mau Forest is a forest complex in the Rift Valley of Kenya. It is the largest indigenous montane forest in East Africa. The Mau Forest complex has an area of . The forest area has some of the highest rainfall rates in Kenya. Mau Forest is the largest drainage basin in Kenya.Daily Nation, July 22, 2008Selfish interests threaten Mau forest Numerous rivers originate from the forest, including the Southern Ewaso Ng'iro, Sondu River, Mara River and Njoro River. These rivers feed Lake Victoria, Lake Nakuru and Lake Natron. The western slopes of the Mau Escarpment are covered by the Mau Forest. Ecology Typical tree species in the Mau Forest include '' Pouteria adolfi-friedericii'', '' Strombosia scheffleri'' and '' Polyscias kikuyuensis''. ''Olea capensis'', ''Prunus africana'', ''Albizia gummifera'', and ''Podocarpus milanjianus'' are also found there. Endemic bird species in the area include Hartlaub's turaco (''Tauraco hartlaubi''), Hunter's cisticola (''Cisticola hunteri'') an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cherangani Hills Forest
View of the hills 100px, A member of the Dorobo, c. 1913, poison-hunters who inhabited small hill villages. Cherangani Hills Forest (Cherangany Hills Forest) is a collection of thirteen forest reserve blocks in western Kenya, located in the Cherangani Hills on the western ridge of the East African Rift. The forested area is about , of which has been gazetted into forest reserves. These forest reserves form the upper catchments of the Kerio and Nzoia and Turkwel rivers. Forest types The three western blocks, Kapkanyar, Kapolet and Kiptaberr, are larger and more consolidated and constitute about 20% of the Cherangani Hills Forest. Most of the rest of the forests are fragmented, cut by grasslands, bushlands, and croplands. The forests themselves are quite varied in composition. To the west, the lower elevations are "''Aningeria''-'' Strombosia''-''Drypetes''" forest, grading into mixed ''Podocarpus milanjianus'' forest on the higher elevations. To the east are "''Juniperus''–''N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Elgon
Mount Elgon is an extinct shield volcano on the border of Uganda and Kenya, north of Kisumu and west of Kitale. The mountain's highest point, named "Wagagai", is located entirely within Uganda."Mount Elgon, Uganda" Peakbagger.com. Retrieved 11 January 2012 Although there is no verifiable evidence of its earliest volcanic activity, geologists estimate that Mount Elgon is at least 24 million years old, making it the oldest extinct volcano in . The mountain's name originates from its name, Elgonyi. Physical f ...
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Pappus (flower Structure)
In Asteraceae, the pappus is the modified calyx, the part of an individual floret, that surrounds the base of the corolla tube in flower. It functions as a wind-dispersal mechanism for the seeds. The term is sometimes used for similar structures in other plant families e.g. in certain genera of the Apocynaceae, although the pappus in Apocynaceae is not derived from the calyx of the flower. In Asteraceae, the pappus may be composed of bristles (sometimes feathery), awns, scales, or may be absent, and in some species, is too small to see without magnification. In genera such as ''Taraxacum'' or ''Eupatorium'', feathery bristles of the pappus function as a "parachute" which enables the seed to be carried by the wind. The name derives from the Ancient Greek word ''pappos'', Latin ''pappus'', meaning "old man", so used for a plant (assumed to be an ''Erigeron'' species) having bristles and also for the woolly, hairy seed of certain plants. The pappus of the dandelion plays a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petiole (botany)
In botany, the petiole () is the stalk that attaches the leaf blade to the stem, and is able to twist the leaf to face the sun. This gives a characteristic foliage arrangement to the plant. Outgrowths appearing on each side of the petiole in some species are called stipules. Leaves with a petiole are said to be petiolate, while leaves lacking a petiole are called sessile or apetiolate. 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. When completely absent, the blade attaches directly to the stem and is said to be sessile. 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 groups, such as the speedwell genus '' Veronica'', petiolate and sessile leaves may occur in different species. In the grasses (Poaceae), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leaf
A leaf ( : leaves) is any of the principal appendages of a vascular plant stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, stem, flower, and fruit collectively form the shoot system. In most leaves, the primary photosynthetic tissue is the palisade mesophyll and is located on the upper side of the blade or lamina of the leaf but in some species, including the mature foliage of ''Eucalyptus'', palisade mesophyll is present on both sides and the leaves are said to be isobilateral. Most leaves are flattened and have distinct upper (adaxial) and lower ( abaxial) surfaces that differ in color, hairiness, the number of stomata (pores that intake and output gases), the amount and structure of epicuticular wax and other features. Leaves are mostly green in color due to the presence of a compound called chlorophyll that is essential for photosynthesis as it absorbs light ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plant Stem
A stem is one of two main structural axes of a vascular plant, the other being the root. It supports leaves, flowers and fruits, transports water and dissolved substances between the roots and the shoots in the xylem and phloem, stores nutrients, and produces new living tissue. The stem can also be called halm or haulm. The stem is normally divided into nodes and internodes: * The nodes hold one or more leaves, as well as buds which can grow into branches (with leaves, conifer cones, or flowers). Adventitious roots may also be produced from the nodes. * The internodes distance one node from another. The term "shoots" is often confused with "stems"; "shoots" generally refers to new fresh plant growth including both stems and other structures like leaves or flowers. In most plants stems are located above the soil surface but some plants have underground stems. Stems have four main functions which are: * Support for and the elevation of leaves, flowers, and fruits. The stems ke ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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