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Jeffreycia Zanzibarensis
''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 ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jeffreycia Zanzibarensis
''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 ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lance
A lance is a spear designed to be used by a mounted warrior or cavalry soldier ( lancer). In ancient and medieval warfare, it evolved into the leading weapon in cavalry charges, and was unsuited for throwing or for repeated thrusting, unlike similar weapons of the javelin and pike family typically used by infantry. Lances were often equipped with a vamplate, a small circular plate to prevent the hand sliding up the shaft upon impact, and beginning in the late 14th century were used in conjunction with a lance rest attached to the breastplate. Though best known as a military and sporting weapon carried by European knights and men-at-arms, the use of lances was widespread throughout Asia, the Middle East, and North Africa wherever suitable mounts were available. Lancers of the medieval period also carried secondary weapons such as swords, battle axes, war hammers, maces and daggers for use in hand-to-hand combat, since the lance was often a one-use-per-engagement weapon; assumi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flora Of East Tropical Africa
Flora is all the plant life present in a particular region or time, generally the naturally occurring (indigenous) native plants. Sometimes bacteria and fungi are also referred to as flora, as in the terms '' gut flora'' or '' skin flora''. 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) was first made by Jules Thurmann (1849). Prior to this, the two terms were used indiscriminately.Thurmann, J. (1849). ''Essai de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asteraceae Genera
The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae were first described in the year 1740. The number of species in Asteraceae is rivaled only by the Orchidaceae, and which is the larger family is unclear as the quantity of extant species in each family is unknown. Most species of Asteraceae are annual, biennial, or perennial herbaceous plants, but there are also shrubs, vines, and trees. The family has a widespread distribution, from subpolar to tropical regions in a wide variety of habitats. Most occur in hot desert and cold or hot semi-desert climates, and they are found on every continent but Antarctica. The primary common characteristic is the existence of sometimes hundreds of tiny individual florets which are held together by protective involucres in flower heads, or more technically ... [...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, St. Petersburg) and China (Kunming Institute of Botany, Kunming). Important Articles *Feb, 2015: The discovery of ''Thismia hongkongensis''. *Apr, 2022: The rediscovery of Gasteranthus extinctus ''Gasteranthus extinctus'' is a species of flowering plant in the family Gesneriaceae. It is endemic to Ecuador. Its natural habitat is subtropical or tropical moist montane forests. The species is a small herb that produces bright orange flower .... References External links All ''PhytoKeys'' issues Botany journals Open access journals Pensoft Publishers academic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cucurbitaceae
The Cucurbitaceae, also called cucurbits or the gourd family, are a plant family consisting of about 965 species in around 95 genera, of which the most important to humans are: *''Cucurbita'' – squash, pumpkin, zucchini, some gourds *''Lagenaria'' – calabash, and others that are inedible *''Citrullus'' – watermelon (''C. lanatus'', ''C. colocynthis'') and others *''Cucumis'' – cucumber (''C. sativus''), various melons and vines *''Momordica'' – bitter melon *''Luffa'' – the common name is also luffa, sometimes spelled loofah (when fully ripened, two species of this fibrous fruit are the source of the loofah scrubbing sponge) *''Cyclanthera'' – Caigua The plants in this family are grown around the tropics and in temperate areas, where those with edible fruits were among the earliest cultivated plants in both the Old and New Worlds. The family Cucurbitaceae ranks among the highest of plant families for number and percentage of species used as human food. The name ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Jeffrey (botanist)
Charles Jeffrey (10 April 1934, Kensington – 29 March 2022 Saint Petersburg, St Petersburg) was a British botanist. He was born in Kensington, London, and went to school in Walthamstow. During his National service he learnt Russian language, Russian at the Joint Services School for Linguistics. After his National Service he went up to Sidney Sussex College, Cambridge, graduating in 1957. He then worked as a Taxonomy (biology), 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 Asteraceae, 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 Confere ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pappus (botany)
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] |
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 fl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gynoecium
Gynoecium (; ) 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 of a flower; it consists of (one or more) ''pistils'' and is typically surrounded by the pollen-producing 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, liverworts, and hornworts. The corresponding terms for the male parts of those plants are clusters of antheridia within the androecium. Flowers that bear a gynoecium but no stamens are called ''pi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thecae
In biology, a theca (plural 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. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anther
The stamen (plural ''stamina'' or ''stamens'') is the pollen-producing reproductive organ 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 ''microsporangia''. Most commonly anthers are two-lobed and are attached to the filament either at the base or in the middle area of the anther. The sterile tissue between the lobes is called the 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 stamens in a flower are collectively called the androecium. The androecium can consist of as few as one-half stamen (i.e. a single locule) as in '' Canna'' species or as many as 3,482 stamens which have been counted in the saguaro (''Carnegiea gigantea''). The androecium in var ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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