|
Purple Trillium
''Trillium erectum'', the red trillium, also known as wake robin, purple trillium, bethroot, or stinking benjamin, is a species of flowering plant in the family Melanthiaceae. The plant takes its common name "wake robin" by analogy with the European robin, which has a red breast heralding spring. Likewise ''Trillium erectum'' is a spring ephemeral whose life-cycle is synchronized with that of the forests in which it lives. It is native to the eastern United States and eastern Canada from northern Georgia to Quebec and New Brunswick. Description ''Trillium erectum'' is a perennial herbaceous plant that grows to about in height with a spread of . It can tolerate extreme cold in winter, surviving temperatures down to . Like all trilliums, its parts are in groups of three, with a 3-petalled flower above a whorl of pointed triple leaves. The petals are dark reddish brown, maroon, purple, pale yellow, or white. The ovary is dark purple to maroon regardless of petal color. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Linnaeus
Carl Linnaeus (; 23 May 1707 – 10 January 1778), also known after his ennoblement in 1761 as Carl von Linné Blunt (2004), p. 171. (), was a Swedish botanist, zoologist, taxonomist, and physician who formalised binomial nomenclature, the modern system of naming organisms. He is known as the "father of modern taxonomy". Many of his writings were in Latin; his name is rendered in Latin as and, after his 1761 ennoblement, as . Linnaeus was born in Råshult, the countryside of Småland, in southern Sweden. He received most of his higher education at Uppsala University and began giving lectures in botany there in 1730. He lived abroad between 1735 and 1738, where he studied and also published the first edition of his ' in the Netherlands. He then returned to Sweden where he became professor of medicine and botany at Uppsala. In the 1740s, he was sent on several journeys through Sweden to find and classify plants and animals. In the 1750s and 1760s, he continued to collect an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semispecies
In biology, a species complex is a group of closely related organisms that are so similar in appearance and other features that the boundaries between them are often unclear. The taxa in the complex may be able to hybridize readily with each other, further blurring any distinctions. Terms that are sometimes used synonymously but have more precise meanings are cryptic species for two or more species hidden under one species name, sibling species for two (or more) species that are each other's closest relative, and species flock for a group of closely related species that live in the same habitat. As informal taxonomic ranks, species group, species aggregate, macrospecies, and superspecies are also in use. Two or more taxa that were once considered conspecific (of the same species) may later be subdivided into infraspecific taxa (taxa within a species, such as bacterial strains or plant varieties), that is complex but it is not a species complex. A species complex is in most cas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Speciation
Speciation is the evolutionary process by which populations evolve to become distinct species. The biologist Orator F. Cook coined the term in 1906 for cladogenesis, the splitting of lineages, as opposed to anagenesis, phyletic evolution within lineages. Charles Darwin was the first to describe the role of natural selection in speciation in his 1859 book ''On the Origin of Species''. He also identified sexual selection as a likely mechanism, but found it problematic. There are four geographic modes of speciation in nature, based on the extent to which speciating populations are isolated from one another: allopatric speciation, allopatric, peripatric speciation, peripatric, parapatric speciation, parapatric, and sympatric speciation, sympatric. Speciation may also be induced artificially, through animal husbandry, agriculture, or laboratory experiments of speciation, laboratory experiments. Whether genetic drift is a minor or major contributor to speciation is the subject of much ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trillium Vaseyi
''Trillium vaseyi'', the sweet wakerobin or sweet beth, is a spring flowering perennial plant which is found only in the southeastern United States, primarily in the southern part of the Appalachian Mountains The Appalachian Mountains, often called the Appalachians, (french: Appalaches), are a system of mountains in eastern to northeastern North America. The Appalachians first formed roughly 480 million years ago during the Ordovician Period. They ... but with a few populations farther south. Sweet wakerobin has among the largest flowers in the trillium family, with red petals up to 7 cm long. It grows in rich woods, sometimes on riverbanks but other times on steep slopes. References *Case, Frederick W. and Case, Roberta B. (1997) ''Trilliums''. External links * * vaseyi Endemic flora of the United States Flora of the Southeastern United States Plants described in 1902 Least concern flora of the United States {{Liliales-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trillium Sulcatum
''Trillium sulcatum'', the furrowed wakerobin, southern red trillium or Barksdale trillium, is a perennial wildflower that blooms in April and May. It is native to the southern Appalachian Mountains and nearby areas from West Virginia to Alabama. ''Trillium sulcatum'' bears its dark reddish flower on a pedicel Pedicle or pedicel may refer to: Human anatomy *Pedicle of vertebral arch, the segment between the transverse process and the vertebral body, and is often used as a radiographic marker and entry point in vertebroplasty and kyphoplasty procedures ... above the leaves, with recurved (bent backwards) petals. The berry is also red. References External links * * (all but the first and last pages) * Wildflowers of the United StatesNorth Carolina Native Plant SocietySoutheastern Flora * sulcatum Flora of the Southeastern United States Flora of the Appalachian Mountains Flora of West Virginia Endemic flora of the United States Least concern flora of the United ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trillium Simile
''Trillium simile'', the jeweled wakerobin, is a spring-flowering perennial plant which is native to southern parts of the Appalachian Mountains in southeastern United States (Tennessee, Georgia (U.S. state), Georgia, North Carolina, North and South Carolina). It is also known as sweet white wake-robin, sweet white trillium and confusing trillium. ''Trillium simile'' prefers to grow in moist humus-rich soils in mature forests at the edges of Rhododendron thickets and at edges of the forest. It is found at elevations of 500 – 700 meters (1,640 - 2,300 feet). Taxonomy ''Trillium simile'' was described by Henry A. Gleason (botanist), Henry A. Gleason in 1906. Bibliography * References External links * * {{Taxonbar, from=Q3024443 Trillium, simile Flora of the Southeastern United States Flora of the Appalachian Mountains Plants described in 1906 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trillium Rugelii
''Trillium rugelii'', also known as the southern nodding trillium or illscented wakerobin, is a species of flowering plant in the family Melanthiaceae. It is native to parts of the southeastern United States. It is found in the Great Smoky Mountains, Fernbank Forest, Steven's Creek Heritage Preserve, and other places of the Piedmont and southern Appalachian Mountains in Alabama, Georgia, South Carolina, North Carolina and Tennessee. It prefers to grow near streams in humus-rich soil under the shade of deciduous trees. ''Trillium rugelii'' is a perennial herbaceous plant that blooms mid April to May. Like some other trillium species (such as ''T. catesbaei'', ''T. cernuum'', and ''T. vaseyi''), its flower hangs below the leaves. In the past, many authors incorrectly cited specimens as ''Trillium cernuum'', which has a similar though smaller flower with shorter stamens and thinner petals. Also, ''T. cernuum'' grows farther north and is less robust. Status As of 2009 the species is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trillium Flexipes
''Trillium flexipes'', known as the nodding wakerobin, bent trillium, or drooping trillium, is a species of flowering plant in the family Melanthiaceae. It is found from Minnesota to Ohio, south to Tennessee, with isolated (and sometimes rare) populations in New York, Pennsylvania, Alabama, and other states. It is an endangered species in Ontario and possibly extirpated in North Carolina. Description ''T. flexipes'' is a perennial herbaceous plant that spreads by means of underground rhizome In botany and dendrology, a rhizome (; , ) is a modified subterranean plant stem that sends out roots and shoots from its nodes. Rhizomes are also called creeping rootstalks or just rootstalks. Rhizomes develop from axillary buds and grow hori ...s. In northern areas, the flower tends to hang below the leaves, while central and southern strains have a large erect flower. The flower petals are normally white but can be reddish or maroon. The fruit is rosy red to purplish and fragran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trillium Cernuum
''Trillium cernuum'' is a species of flowering plant in the bunchflower family Melanthiaceae. The specific epithet ''cernuum'' means "drooping, curving forwards, facing downwards", a distinctive habit of its flower. It is commonly called nodding trillium or nodding wakerobin (not to be confused with ''Trillium flexipes'') since the flower is invariably found nodding beneath the leaves. It is sometimes referred to as the northern nodding trillium to distinguish from ''Trillium rugelii'', a similar nodding species native to the southern Appalachian Mountains. It is also called the whip-poor-will flower since presumably its bloom coincides with the spring arrival of the migrating bird with the same name. ''Trillium cernuum'' was thought to be one of three species of ''Trillium'' described by Swedish botanist Carl Linnaeus in 1753 (the other two being ''Trillium erectum'' and ''Trillium sessile''). The specimen examined by Linnaeus was actually '' Trillium catesbaei'', a nodding sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Style (botany)
The stigma () is the receptive tip of a carpel, or of several fused carpels, in the gynoecium of a flower. Description The stigma, together with the style and ovary (typically called the stigma-style-ovary system) comprises the pistil, which is part of the gynoecium or female reproductive organ of a plant. The stigma itself forms the distal portion of the style, or stylodia, and is composed of , the cells of which are receptive to pollen. These may be restricted to the apex of the style or, especially in wind pollinated species, cover a wide surface. The stigma receives pollen and it is on the stigma that the pollen grain germinates. Often sticky, the stigma is adapted in various ways to catch and trap pollen with various hairs, flaps, or sculpturings. The pollen may be captured from the air (wind-borne pollen, anemophily), from visiting insects or other animals ( biotic pollination), or in rare cases from surrounding water (hydrophily). Stigma can vary from long and slen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ovary (botany)
In the flowering plants, an ovary is a part of the female reproductive organ of the flower or gynoecium. Specifically, it is the part of the pistil which holds the ovule(s) and is located above or below or at the point of connection with the base of the petals and sepals. The pistil may be made up of one carpel or of several fused carpels (e.g. dicarpel or tricarpel), and therefore the ovary can contain part of one carpel or parts of several fused carpels. Above the ovary is the style and the stigma, which is where the pollen lands and germinates to grow down through the style to the ovary, and, for each individual pollen grain, to fertilize one individual ovule. Some wind pollinated flowers have much reduced and modified ovaries. Fruits A fruit is the mature, ripened ovary of a flower following double fertilization in an angiosperm. Because gymnosperms do not have an ovary but reproduce through double fertilization of unprotected ovules, they produce naked seeds that do not ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stigma (anatomy)
A stigma, also called macula pellucida, in mammalian reproductive anatomy, refers to the area of the ovarian surface where the Graafian follicle will burst through during ovulation and release the ovum. As the follicle matures, the area between the follicle and the ovarian surface begins to thin and weaken under the influence of the luteinizing hormone and local cytokines. At ovulation the stigma ruptures and the secondary oocyte is released along with surrounding granulosa cells, from the region of the cumulus oophorus, and follicular fluid. The secondary oocyte needs to be captured by the fallopian tube where it could be fertilized by a sperm cell. The stigma will heal and the residual follicle is transformed into the corpus luteum The corpus luteum (Latin for "yellow body"; plural corpora lutea) is a temporary endocrine structure in female ovaries involved in the production of relatively high levels of progesterone, and moderate levels of estradiol, and inhibin A. It is t . ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Speciation")
_(255_30)_Tulip;_cross-section.jpg "Click for more on -> Ovary (botany)")