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Selaginella
''Selaginella'', also known as spikemosses or lesser clubmosses, is a genus of lycophyte. It is usually treated as the only genus in the family Selaginellaceae, with over 750 known species. This family is distinguished from Lycopodiaceae (the clubmosses) by having scale-leaves bearing a ligule and by having spores of two types. They are sometimes included in an informal paraphyletic group called the " fern allies". The species '' S. moellendorffii'' is an important model organism. Its genome has been sequenced by the United States Department of Energy's Joint Genome Institute. The name ''Selaginella'' was erected by Palisot de Beauvois solely for the species '' Selaginella selaginoides'', which turns out (with the closely related '' Selaginella deflexa'') to be a clade that is sister to all other ''Selaginellas'', so any definitive subdivision of the species into separate genera leaves two taxa in ''Selaginella'', with the hundreds of other species in new or resurrected gen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spikemoss Selaginella Tamariscina Curled Up
''Selaginella'', also known as spikemosses or lesser clubmosses, is a genus of lycophyte. It is usually treated as the only genus in the family Selaginellaceae, with over 750 known species. This family is distinguished from Lycopodiaceae (the clubmosses) by having scale-leaves bearing a ligule and by having heterospory, spores of two types. They are sometimes included in an informal paraphyletic group called the "fern ally, fern allies". The species ''Selaginella moellendorffii, S. moellendorffii'' is an important model organism. Its genome has been sequenced by the United States Department of Energy's Joint Genome Institute. The name ''Selaginella'' was erected by Palisot de Beauvois solely for the species ''Selaginella selaginoides'', which turns out (with the closely related ''Selaginella deflexa'') to be a clade that is sister to all other ''Selaginellas'', so any definitive subdivision of the species into separate genera leaves two taxa in ''Selaginella'', with the hundre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Selaginella Kraussiana
''Selaginella kraussiana'' is a species of vascular plant in the family Selaginellaceae. It is referred to by the common names Krauss' spikemoss, Krauss's clubmoss, or African clubmoss, and is found naturally in parts of Sub-Saharan Africa and in Macaronesia. It is sometimes given the misnomer of “peacock fern”, due to its lacy leaf structure, despite having no relation to actual ferns; rather, it belongs to the very ancient lineage of plants known as the clubmosses. Description Growing to just high, it is a low-growing, mat-forming evergreen perennial with primitive fern-like leaves, that spreads via rooting stems. Seginella kraussiana.jpg, Illustrating greener coloration when grown in brighter light Selaginella kraussiana OB10.1.jpg, Close-up of the foliage Distribution Its native distribution is the Macaronesia, and parts of south and east Africa. Its native distribution in the Azores was controversial up until 2005, when spores of this species were discover ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Selaginella Deflexa
''Selaginella deflexa'', commonly known as deflexed spikemoss, is a non-flowering species of plant in the spikemoss genus ''Selaginella'' and is in the subgenus of the same name. It is closely related to '' Selaginella selaginoides'' which is the only other member in its subgenus. This subgenus is unique in that it lacks the rhizophores typically seen along the stems of other ''Selaginella'' species. It is endemic to Hawaii and grows primarily in the wet tropical biome. This plant gets its name from its reflexed leaves which point outwards. Description ''Selaginella deflexa'' is a small vascular plant that grows to in height. It has needle-like leaves that bend downwards and exhibit a lanceolate or ovate-lanceolate shape. ''Selaginella deflexa'' additionally have spiky, helical strobili in which the sporangia-bearing sporophylls are embedded. The plant tends to have a yellowish-green color, and its roots can be found attached to a swollen region of a long hypocotyl base. Rep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Selaginella Moellendorffii
''Selaginella moellendorffii'' is a lycophyte that is an important model organism, especially in comparative genomics. ''S. moellendorffii'' is a member of an ancient vascular plant lineage that first appeared in the fossil record some 400 million years ago. They would later form a dominant part of the world's flora during the Carboniferous period. They have a number of unusual and/or "primitive" features, such as rudimentary leaves ( microphylls), ubiquitous dichotomous branching, heterospory, and the ligule. As the earliest diverging group of modern vascular plants, they are essential to understanding the evolution of plants as a whole. Morphology and anatomy ''Selaginella moellendorffii'' exhibits unique morphological features characteristic of lycophytes. The plant possesses microphylls—small leaves with a single unbranched vein—and displays dichotomous branching patterns. Its vascular system comprises protosteles, and roots arise from specialized structures called rhiz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Selaginella Selaginoides
''Selaginella selaginoides'' is a non-flowering plant of the spikemoss genus ''Selaginella'' with a wide distribution around the Northern Hemisphere. It resembles a moss in appearance but is a vascular plant belonging to the division Lycopodiophyta. It has a number of common names including lesser clubmoss, club spikemoss, northern spikemoss, low spikemoss and prickly mountain-moss. This plant has one close relative, ''Selaginella deflexa'', native to Hawaii. These two plants form a small clade that is sister to all other ''Selaginella'' species. Description It is a small, delicate, low-growing plant. Its perennial sterile stems are short, slender and irregularly branched reaching up to 15 cm in length. They creep along the ground but usually turn upwards near the tip. They have small, pointed, triangular leaves about 1–2 mm long, each bearing a ligule on its upper surface near the base. The plant also produces annual fertile shoots. They are more robust than the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Selaginella Erythropus
''Selaginella erythropus'' is a species of spike moss in the family Selaginellaceae. It is native to Central and tropical South America, and may be native or introduced in the West Indies The West Indies is an island subregion of the Americas, surrounded by the Atlantic Ocean, North Atlantic Ocean and the Caribbean Sea, which comprises 13 independent island country, island countries and 19 dependent territory, dependencies in thr .... It has been introduced to Tanzania. It grows up to in height, and the upper surface of the fronds is green and the underside is a bright, ruby red color. It likes plentiful water and humidity and enjoys temperatures of . References erythropus {{lycophyte-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Selaginella Rupestris
''Selaginella rupestris'', the northern selaginella sometimes locally known as ledge spike-moss or rock spike-moss, is a species of spike-moss occurring in dry rocky places in eastern North America, including one locality in Greenland Greenland is an autonomous territory in the Danish Realm, Kingdom of Denmark. It is by far the largest geographically of three constituent parts of the kingdom; the other two are metropolitan Denmark and the Faroe Islands. Citizens of Greenlan .... It has a wide but sporadic range. In the absence of water, it rolls into a ball for which, it is also known as bird nest moss. Again, when it comes in contact with water, it opens up. It is listed as imperiled and threatened in the State of Indiana. References External linksFlora of North America rupestris Flora of Northern America Plants described in 1753 Taxa named by Carl Linnaeus Lithophytes {{Lycophyte-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lycophyte
The lycophytes, when broadly circumscribed, are a group of vascular plants that include the clubmosses. They are sometimes placed in a division Lycopodiophyta or Lycophyta or in a subdivision Lycopodiophytina. They are one of the oldest lineages of extant (living) vascular plants; the group contains extinct plants that have been dated from the Silurian (ca. 425 million years ago). Lycophytes were some of the dominating plant species of the Carboniferous period, and included the tree-like Lepidodendrales, some of which grew over in height, although extant lycophytes are relatively small plants. The scientific names and the informal English names used for this group of plants are ambiguous. For example, "Lycopodiophyta" and the shorter "Lycophyta" as well as the informal "lycophyte" may be used to include the extinct zosterophylls or to exclude them. Description Lycophytes reproduce by spores and have alternation of generations in which (like other vascular plants) the sporop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ligule
A ligule (from "strap", variant of ''lingula'', from ''lingua'' "tongue") is a thin outgrowth at the junction of leaf A leaf (: leaves) is a principal appendage of the plant stem, stem of a vascular plant, usually borne laterally above ground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leav ... and leafstalk of many grasses (family Poaceae) and sedges (family Cyperaceae). A ligule is also a strap-shaped extension of the corolla, such as that of a ray floret in plants in the daisy family Asteraceae. Poaceae and Cyperaceae The ligule is part of the leaf that is found at the junction of the blade and sheath of the leaf. It may take several forms, but it is commonly some form of translucent membrane or a fringe of hairs. The membranous ligule can be very short 1–2 mm ( Kentucky bluegrass, ''Poa pratensis'') to very long 10–20 mm ( Johnson grass, ''Sorghum halepense''), it can also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lycopodiaceae
The Lycopodiaceae (class Lycopodiopsida, order Lycopodiales) are an old family of vascular plants, including all of the core clubmosses and firmosses, comprising 17 accepted genera and about 500 known species. This family originated about 380 million years ago in the early Devonian, though the diversity within the family has been much more recent. "Wolf foot" is another common name for this family due to the resemblance of either the roots or branch tips to a wolf's paw. Description Members of Lycopodiaceae are not spermatophytes and so do not produce seeds. Instead they produce spores, which are oily and flammable, and are the most economically important aspects of these plants. The spores are of one size (i.e. the plants are isosporous) and are borne on a specialized structure at the apex of a shoot called a strobilus (plural: strobili), which resembles a tiny battle club, from which the common name derives. Members of the family share the common feature of having a microphy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poikilohydry
Poikilohydry is the lack of ability (structural or functional mechanism) to maintain and/or regulate water content to achieve homeostasis of cells and tissue connected with quick equilibration of cell/tissue water content to that of the environment. The term is derived from Ancient Greek ποικίλος (poikílos, “spotted or variegate” Tolerance to desiccation has been utilized in the Archaea, Bacteria, and Eukaryote kingdoms to take advantage of ecological niches. The tolerance to desiccation is often combined with other abiotic stress factors such as temperature extremes, malnutrition, vitamin imbalances, salinity content, and ultraviolet radiation. Many plants control desiccation tolerance through non-specialized structures such as vegetative tissues or specialized structures such as spores, seeds, and tubers. Desiccation tolerance is distributed among Bryophytes that have no Plant cuticle, cuticle or stomata, nine Pteridophyte families and ten Angiosperm families, vascula ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
