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Jeffreycia
''Jeffreycia'' is a genus of African flowering plants in the family Asteraceae. They are in the tribe Vernonieae. It is native to Tropical eastern Africa and also Sri Lanka. It is found in the countries of Ethiopia, Kenya, Madagascar, Mozambique, Somalia and Tanzania. Description ''Jeffreycia'' are small to moderate-sized, branching, often scrambling shrubs. They have woody stems, with narrow and solid pith. The leaves are arranged alternate with petioles (leaf stalks) distinct and short to elongated. The leaf blades are ovate to elliptic or panduriform (fiddle-shaped) usually with basal auricles (ear-shaped lobe). They are to about long and about wide. They have crenated (rounded teeth) or serrated margins and the apices (leaf-tips) are acute to scarcely acuminate (tapering gradually to a point) and rarely obtuse. The upper surface of the leaf is sparsely pilosulous (covered with soft, weak, thin and clearly separated hairs) or hispidulous (bearing long, erect, rigid hairs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asteraceae Genera
, Plants of the World Online listed 1,706 accepted genera in the family Asteraceae. Those genera are listed with their author citations. Taxonomic synonyms are not included. A List of genera is from Plants of the World Online unless otherwise cited. *''Abrotanella'' Cass. *'' Acamptopappus'' A.Gray – goldenhead *'' Acanthocephalus'' Kar. & Kir. *'' Acanthocladium'' F.Muell. *'' Acanthodesmos'' C.D.Adams & duQuesnay *'' Acanthospermum'' Schrank – starburr *'' Acanthostyles'' R.M.King & H.Rob. *'' Achillea'' L. – yarrow *'' Achnophora'' F.Muell. *'' Achnopogon'' Maguire, Steyerm. & Wurdack *'' Achyrachaena'' Schauer – blow wives *'' Achyranthemum'' N.G.Bergh *'' Achyrocline'' (Less.) DC. *'' Achyropappus'' Kunth *'' Acilepidopsis'' H.Rob. *'' Acilepis'' D.Don *'' Acmella'' Rich. ex Pers. *'' Acomis'' F.Muell. *'' Acourtia'' D.Don – desert peony *'' Acrisione'' B.Nord. *'' Acritopappus'' R.M.King & H.Rob. *'' Actinobole'' Endl. *'' Acunniana'' Orchard *'' Adei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vernonieae
Vernonieae is a tribe of about 1300 species of plants in the aster family. They are mostly found in the tropics and warmer temperate areas, both in the Americas and the Old World. They are mostly herbaceous plants or shrubs, although there is at least one tree species, '' Vernonia arborea''. Taxonomy Vernonieae is considered sister to the tribe Liabeae. The tribe originated in southern Africa or Madagascar, and spread to the Americas in at least two different events. In many works some 80% of the species in this tribe are classified in the genus ''Vernonia''. Other authors, like Harold E. Robinson, divide the tribe into a larger number of small genera. Genera Genera accepted by the Global Compositae Database as of March 2023: *'' Acanthodesmos'' *'' Acilepidopsis'' *'' Acilepis'' *'' Adenoon'' *'' Aedesia'' *'' Ageratinastrum'' *'' Albertinia'' *'' Ambassa'' *'' Ananthura'' *'' Anteremanthus'' *'' Baccharoides'' *'' Bechium'' *'' Bishopalea'' *'' Blanchetia'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Jeffrey (botanist)
Charles Jeffrey (10 April 1934 – 29 March 2022) was a British botanist. He was born in Kensington, England, and went to school in Walthamstow. During his National service he learnt Russian at the Joint Services School for Linguists. After his National Service he went up to Sidney Sussex College, Cambridge, graduating in 1957. He then worked as a taxonomist at the Herbarium, Royal Botanic Gardens, Kew, until he retired in 1994. He wrote on Botanical nomenclature and in 1969 translated 'Flowering plants: origin and dispersal' by Armen Takhtajan into English. His main research interests were in the Cucurbitaceae and Compositae. His interest in plant systematics led him in 1982 to propose a five-kingdom classification. He also collected plants, such in Gabon (1957), the Seychelles (1962/63), Kenya (1963), Mongolia (1970), and Venezuela (1977). After the International Compositae Conference of July 1994 he moved to St. Petersburg, Russia, where he was based at the Komarov Botanica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anther
The stamen (: stamina or stamens) is a part consisting of the male reproductive organs of a flower. Collectively, the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filament and an anther which contains sporangium, microsporangia. Most commonly, anthers are two-lobed (each lobe is termed a locule) and are attached to the filament either at the base or in the middle area of the anther. The sterile (i.e. nonreproductive) tissue between the lobes is called the Connective (botany), connective, an extension of the filament containing conducting strands. It can be seen as an extension on the dorsal side of the anther. A pollen grain develops from a microspore in the microsporangium and contains the male gametophyte. The size of anthers differs greatly, from a tiny fraction of a millimeter in ''Wolfia'' spp up to five inches (13 centimeters) in ''Canna iridiflora'' and ''Strelitzia nicolai''. The stamens in a flower ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flora Of East Tropical Africa
Flora (: floras or florae) is all the plant life present in a particular region or time, generally the naturally occurring ( indigenous) native plants. The corresponding term for animals is ''fauna'', and for fungi, it is '' funga''. Sometimes bacteria and fungi are also referred to as flora as in the terms ''gut flora'' or ''skin flora'' for purposes of specificity. Etymology The word "flora" comes from the Latin name of Flora, the goddess of plants, flowers, and fertility in Roman mythology. The technical term "flora" is then derived from a metonymy of this goddess at the end of the sixteenth century. It was first used in poetry to denote the natural vegetation of an area, but soon also assumed the meaning of a work cataloguing such vegetation. Moreover, "Flora" was used to refer to the flowers of an artificial garden in the seventeenth century. The distinction between vegetation (the general appearance of a community) and flora (the taxonomic composition of a community) wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PhytoKeys
''PhytoKeys'' is a peer-reviewed, open-access online and print botanical journal. Its stated goal is "to support free exchange of ideas and information in systematic botany". Printed issues of the journal are available in the libraries of the United States (Smithsonian Institution, Missouri Botanical Garden), United Kingdom (Natural History Museum, London, Royal Botanic Gardens, Kew), Russia (Komarov Botanical Institute The Komarov Botanical Institute of the Russian Academy of Sciences () is a leading botanical institution in Russia, It is located on Aptekarsky Island in St. Petersburg, and is named after the Russian botanist Vladimir Leontyevich Komarov (1869– ..., St. Petersburg) and China ( Kunming Institute of Botany, Kunming). Important Articles *March 2025: The discovery of '' Ovicula biradiata''. *Feb, 2015: The discovery of '' Thismia hongkongensis''. *Apr, 2022: The rediscovery of Gasteranthus extinctus. References External links All ''PhytoKeys'' issues Botany j ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cucurbitaceae
The Cucurbitaceae (), also called cucurbits or the gourd family, are a plant family (biology), family consisting of about 965 species in 101 genera.Cucurbitaceae Juss. ''Plants of the World Online''. Retrieved 10 June 2024. Those of most agricultural, commercial or nutritional value to humans include: *''Cucurbita'' – Squash (plant), squash, pumpkin, zucchini (courgette), some gourds. *''Lagenaria'' – calabash (bottle gourd) and other, ornamental gourds. *''Citrullus'' – watermelon (''C. lanatus'', ''C. colocynthis''), plus several other species. *''Cucumis'' – cucumber (''C. sativus''); various melons and vines. *''Momordica'' – Momordica charantia, bitter melon. *''Luffa'' – commonly called 'luffa' or ‘luffa squash'; sometimes spelled loofah. Young fruits may be cooked; when fully ripened, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pappus (botany)
In Asteraceae, the pappus is the modified calyx_(botany), calyx, the part of an individual floret, that surrounds the base of the petal, corolla tube in flower. It functions as a dispersal mechanism for the achenes that contain the seeds. 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. In genera such as ''Bidens'' the pappus has hooks that function in mechanical dispersal. 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 Taraxacum, dandelion plays a vital role in the wind-aided dispersal of its seeds. By cr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Achenes
An achene (; ), also sometimes called akene and occasionally achenium or achenocarp, is a type of simple dry fruit produced by many species of flowering plants. Achenes are monocarpellate (formed from one carpel) and indehiscent (they do not open at maturity). Achenes contain a single seed that nearly fills the pericarp, but does not adhere to it. In many species, what is called the "seed" is an achene, a fruit containing the seed. The seed-like appearance is owed to the hardening of the fruit wall (pericarp), which encloses the solitary seed so closely as to seem like a seed coat. Examples The fruits of buttercup, buckwheat, caraway, quinoa, amaranth, and cannabis are typical achenes. The achenes of the strawberry are sometimes mistaken for seeds. The strawberry is an accessory fruit with an aggregate of achenes on its outer surface, and what is eaten is accessory tissue. A rose produces an aggregate of achene fruits that are encompassed within an expanded hypanthium (aka flo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gynoecium
Gynoecium (; ; : gynoecia) is most commonly used as a collective term for the parts of a flower that produce ovules and ultimately develop into the fruit and seeds. The gynoecium is the innermost whorl (botany), whorl of a flower; it consists of (one or more) ''#Pistil, pistils'' and is typically surrounded by the pollen-producing plant reproductive morphology, reproductive organs, the stamens, collectively called the androecium. The gynoecium is often referred to as the "female" portion of the flower, although rather than directly producing female gametes (i.e. egg cells), the gynoecium produces megaspores, each of which develops into a female gametophyte which then produces egg cells. The term gynoecium is also used by botanists to refer to a cluster of archegonia and any associated modified leaves or stems present on a gametophyte shoot in mosses, Marchantiophyta, liverworts, and hornworts. The corresponding terms for the male parts of those plants are clusters of antheridiu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thecae
In biology, a theca (: thecae) is a sheath or a covering. Botany In botany, the theca is related to plant's flower anatomy. The theca of an angiosperm consists of a pair of microsporangia that are adjacent to each other and share a common area of dehiscence called the stomium. Larry Hufford, "The origin and early evolution of angiosperm stamens" i''The Anther: form, function, and phylogeny'' William G. D'Arcy and Richard C. Keating (editors), Cambridge University Press, 1996, 351pp, p.60, (from Google Books) Any part of a microsporophyll that bears microsporangia is called an anther. Most anthers are formed on the apex of a filament. An anther and its filament together form a typical (or filantherous) stamen, part of the male floral organ. The typical anther is bilocular, i.e. it consists of two thecae. Each theca contains two microsporangia, also known as pollen sacs. The microsporangia produce the microspores, which for seed plants are known as pollen grains. If the polle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
