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Botrychium Minganense
''Botrychium minganense'' is a species of fern in the family Ophioglossaceae known by the common name Mingan moonwort. It is native to North America from Alaska and northern Canada to Arizona, where it is uncommon throughout most of its range, appearing at scattered spots in coniferous forests and marshy areas such as swamps. Description This is very small plant growing from an underground caudex and sending one thin leaf above the surface of the ground. The leaf is up to 10 centimeters tall and is divided into a sterile and a fertile part. The sterile part of the leaf has fan-shaped or spoon-shaped leaflets. The fertile part of the leaf is very different in shape, with grape-like clusters of sporangia by which it reproduces. It is a fern that is between 8 and 25 centimeters tall. It is divided into two parts, the portion which has spores (the sporophore) and the sterile blade (the trophophore). The blade is yellowish-green, clearly stalked, and has up to ten pairs of pinnae (fe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marie-Victorin
Brother Marie-Victorin, F.S.C. (April 3, 1885 – July 15, 1944), was a Canadian member of Brothers of the Christian Schools and a noted botanist in Quebec, Canada. He is known as the father of the Botanical Garden of Montreal. Biography He was born Joseph-Louis-Conrad Kirouac to Cyrille Kirouac, a flower merchant, and Philomène Luneau in Kingsey Falls, Quebec. Prior to taking religious vows and becoming Brother Marie-Victorin, he was known as Conrad. Although Brother Victorin is on record as having suggested that Montreal build its own botanical gardens as early as 1919,Le frère Marie-Victorin : l’âme du Jardin botanique by Yves Gingras, in ''Quatre-Temps'', vol. 30, June 2006; pp. 16-19 the Garden was not authorized until 1929 when Montreal Mayor |
Botrychium Neolunaria
''Botrychium'' is a genus of ferns, seedless vascular plants in the family Ophioglossaceae. ''Botrychium'' species are known as moonworts. They are small, with fleshy roots, and reproduce by spores shed into the air. One part of the leaf, the trophophore, is sterile and fernlike; the other, the sporophore, is fertile and carries the clusters of sporangia or spore cases. Some species only occasionally emerge above ground and gain most of their nourishment from an association with mycorrhizal fungi. The circumscription of ''Botrychium'' is disputed between different authors; some botanists include the genera ''Botrypus'' and '' Sceptridium'' within ''Botrychium'', while others treat them as distinct. The latter treatment is provisionally followed here. Taxonomy * – pointed moonwort * – Alaska moonwort * – upswept moonwort, triangle-lobed moonwort, upward-lobed moonwort * – northern moonwort * – prairie moonwort, prairie dunewort, Iowa moonwort * – dainty ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uvularia Grandiflora
''Uvularia grandiflora'', the large-flowered bellwort or merrybells, is a species of flowering plant in the family Colchicaceae, native to eastern and central North America. Description Growing to tall by broad, it is a rhizomatous herbaceous perennial with pendent leaves which are hairy on the undersides. It blooms in mid- to late spring, producing large yellow, solitary or paired, bell-shaped, pendent flowers. The top parts of the plant tend to bend downward due to the weight of the leaves and flowers. The light green stems are round, glabrous, and glaucous and the leaves are perfoliate since the stem appears to come through the leaves at the base. In late summer three capsuled ovaries split open releasing the seeds. The Latin specific epithet ''grandiflora'' means "large flowered". This plant differs from '' Uvularia sessilifolia'' in that the leaves of the latter grow from the stem and its flowers are smaller. ''U. grandiflora'' also differs from '' Uvularia perfoliata,' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tilia Americana
''Tilia americana'' is a species of tree in the family Malvaceae, native to eastern North America, from southeast Manitoba east to New Brunswick, southwest to northeast Oklahoma, southeast to South Carolina, and west along the Niobrara River to Cherry County, Nebraska. It is the sole representative of its genus in the Western Hemisphere, assuming ''T. caroliniana'' is treated as a subspecies or local ecotype of ''T. americana''. Common names include American basswood and American linden. Description The American basswood is a medium-sized to large deciduous tree reaching a height of exceptionally with a trunk diameter of at maturity. It grows faster than many North American hardwoods, often twice the annual growth rate of American beech and many birch species. Life expectancy is around 200 years, with flowering and seeding generally occurring between 15 and 100 years, though occasionally seed production may start as early as eight years. The crown is domed, the branches s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acer Saccharum
''Acer saccharum'', the sugar maple, is a species of flowering plant in the soapberry and lychee family Sapindaceae. It is native to the hardwood forests of eastern Canada and eastern United States. Sugar maple is best known for being the primary source of maple syrup and for its brightly colored fall foliage. It may also be known as "rock maple", "sugar tree", "birds-eye maple", "sweet maple", "curly maple", or "hard maple", particularly when referring to the wood. Description ''Acer saccharum'' is a deciduous tree normally reaching heights of , and exceptionally up to . A 10-year-old tree is typically about tall. As with most trees, forest-grown sugar maples form a much taller trunk and narrower canopy than open-growth ones. The leaves are deciduous, up to long and wide, palmate, with five lobes and borne in opposite pairs. The basal lobes are relatively small, while the upper lobes are larger and deeply notched. In contrast with the angular notching of the silver ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Botrychium
''Botrychium'' is a genus of ferns, seedless vascular plants in the family Ophioglossaceae. ''Botrychium'' species are known as moonworts. They are small, with fleshy roots, and reproduce by spores shed into the air. One part of the leaf, the trophophore, is sterile and fernlike; the other, the sporophore, is fertile and carries the clusters of sporangia or spore cases. Some species only occasionally emerge above ground and gain most of their nourishment from an association with mycorrhizal fungi. The circumscription of ''Botrychium'' is disputed between different authors; some botanists include the genera ''Botrypus'' and ''Sceptridium'' within ''Botrychium'', while others treat them as distinct. The latter treatment is provisionally followed here. Taxonomy * – pointed moonwort * – Alaska moonwort * – upswept moonwort, triangle-lobed moonwort, upward-lobed moonwort * – northern moonwort * – prairie moonwort, prairie dunewort, Iowa moonwort * – dainty moo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Botrychium Spathulatum
''Botrychium'' is a genus of ferns, seedless vascular plants in the family Ophioglossaceae. ''Botrychium'' species are known as moonworts. They are small, with fleshy roots, and reproduce by spores shed into the air. One part of the leaf, the trophophore, is sterile and fernlike; the other, the sporophore, is fertile and carries the clusters of sporangia or spore cases. Some species only occasionally emerge above ground and gain most of their nourishment from an association with mycorrhizal fungi. The circumscription of ''Botrychium'' is disputed between different authors; some botanists include the genera '' Botrypus'' and '' Sceptridium'' within ''Botrychium'', while others treat them as distinct. The latter treatment is provisionally followed here. Taxonomy * – pointed moonwort * – Alaska moonwort * – upswept moonwort, triangle-lobed moonwort, upward-lobed moonwort * – northern moonwort * – prairie moonwort, prairie dunewort, Iowa moonwort * – dainty moo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rachis
In biology, a rachis (from the grc, ῥάχις [], "backbone, spine") is a main axis or "shaft". In zoology and microbiology In vertebrates, ''rachis'' can refer to the series of articulated vertebrae, which encase the spinal cord. In this case the ''rachis'' usually forms the supporting axis of the body and is then called the spine or vertebral column. ''Rachis'' can also mean the central shaft of pennaceous feathers. In the gonad of the invertebrate nematode ''Caenorhabditis elegans'', a rachis is the central cell-free core or axis of the gonadal arm of both adult males and hermaphrodites where the germ cells have achieved pachytene and are attached to the walls of the gonadal tube. The rachis is filled with cytoplasm. In botany In plants, a rachis is the main axis of a compound structure. It can be the main stem of a compound leaf, such as in ''Acacia'' or ferns, or the main, flower-bearing portion of an inflorescence above a supporting peduncle. Where it subdivide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fern
A fern (Polypodiopsida or Polypodiophyta ) is a member of a group of vascular plants (plants with xylem and phloem) that reproduce via spores and have neither seeds nor flowers. The polypodiophytes include all living pteridophytes except the lycopods, and differ from mosses and other bryophytes by being vascular, i.e., having specialized tissues that conduct water and nutrients and in having life cycles in which the branched sporophyte is the dominant phase. Ferns have complex leaves called megaphylls, that are more complex than the microphylls of clubmosses. Most ferns are leptosporangiate ferns. They produce coiled fiddleheads that uncoil and expand into fronds. The group includes about 10,560 known extant species. Ferns are defined here in the broad sense, being all of the Polypodiopsida, comprising both the leptosporangiate ( Polypodiidae) and eusporangiate ferns, the latter group including horsetails, whisk ferns, marattioid ferns, and ophioglossoid fe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sporophore
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Sporangium
A sporangium (; from Late Latin, ) is an enclosure in which spores are formed. It can be composed of a single cell or can be multicellular. Virtually all plants, fungi, and many other lineages form sporangia at some point in their life cycle. Sporangia can produce spores by mitosis, but in nearly all land plants and many fungi, sporangia are the site of meiosis and produce genetically distinct haploid spores. Fungi In some phyla of fungi, the sporangium plays a role in asexual reproduction, and may play an indirect role in sexual reproduction. The sporangium forms on the sporangiophore and contains haploid nuclei and cytoplasm. Spores are formed in the sporangiophore by encasing each haploid nucleus and cytoplasm in a tough outer membrane. During asexual reproduction, these spores are dispersed via wind and germinate into haploid hyphae. Although sexual reproduction in fungi varies between phyla, for some fungi the sporangium plays an indirect role in sexual re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
