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Pentagramma Triangularis
''Pentagramma'' is a small genus of North American ferns in the family Pteridaceae. Until 1990 members of this genus were included in ''Pityrogramma'', and there has been considerable disagreement regarding the species' taxonomy. In the most recent treatment, six diploid species are recognized. The distribution of ''P. triangularis'' (goldback fern) extends from British Columbia through the western United States into Baja California in northwestern Mexico.C.Michael Hogan, ed. 2010.‘’Pentagramma triangularis’’ . Encyclopedia of Life./ref> ''Pentagramma maxonii'' occurs in New Mexico, Arizona, Sonora, Baja California Sur, California, and Baja California. All other species are restricted to California and Baja California. Members of the genus ''Pentagramma'' produce a powdery-waxy secretion on their lower leaf surfaces, called Epicuticular wax#Farina, farina. This character is shared with the related genus ''Notholaena''and other members of the Cheilanthoideae. Species , ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fern
The ferns (Polypodiopsida or Polypodiophyta) are a group of vascular plants (plants with xylem and phloem) that reproduce via spores and have neither seeds nor flowers. They differ from mosses 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 leaf, leaves called megaphylls that are more complex than the microphylls of clubmosses. Most ferns are leptosporangiate ferns. They produce coiled Fiddlehead fern, 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 (plant), Polypodiidae) and eusporangiate ferns, the latter group including horsetails, Psilotaceae, whisk ferns, marattioid ferns, and ophioglossoid ferns. The fern crown group, consisting of the leptosporangiates and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pteridaceae
Pteridaceae is a family of ferns in the order Polypodiales, including some 1150 known species in ca 45 genera (depending on taxonomic opinions), divided over five subfamilies. The family includes four groups of genera that are sometimes recognized as separate families: the adiantoid, cheilanthoid, pteridoid, and hemionitidoid ferns. Relationships among these groups remain unclear, and although some recent genetic analyses of the Pteridales suggest that neither the family Pteridaceae nor the major groups within it are all monophyletic, as yet these analyses are insufficiently comprehensive and robust to provide good support for a revision of the order at the family level. Description Members of Pteridaceae have creeping or erect rhizomes. The leaves are almost always compound and have linear sori that are typically on the margins of the leaves and lack a true indusium, typically being protected by a false indusium formed from the reflexed margin of the leaf. Taxonomy Tra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pityrogramma
''Pityrogramma'', the silverback ferns, or goldback ferns, is a fern genus in the subfamily Pteridoideae of the family Pteridaceae. Species , ''Plants of the World Online Plants of the World Online (POWO) is an online taxonomic database published by the Royal Botanic Gardens, Kew. History Following the Convention on Biological Diversity, the Royal Botanic Gardens in Kew launched Plants of the World Online i ...'' recognized the following species and hybrids: Other species: *'' P. aurantiaca'' (Hieron.) C.Chr. *'' P. chrysoconia'' Maxon ex Domin *'' P. chrysophylla'' Link (Island goldback fern) *'' P. dealbata'' (C.Presl) Domin *'' P. dukei'' Lellinger *'' P. eggersii'' Maxon *'' P. elongata'' (C.Chr.) Pic.Serm. *'' P. euchrysa'' (Ekman ex Christensen) Ekman ex Testo *'' P. ferruginea'' (Kunze) Maxon * ''P.'' ×''herzogii'' (Rosenst.) L.D.Gómez *'' P. hirsuta'' Testo *'' P. humbertii'' C.Chr. *'' P. jamesonii'' (Baker) Domin *'' P. lehmannii'' (Hieron.) R.M.Tryon * ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Columbia
British Columbia is the westernmost Provinces and territories of Canada, province of Canada. Situated in the Pacific Northwest between the Pacific Ocean and the Rocky Mountains, the province has a diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, forests, lakes, mountains, inland deserts and grassy plains. British Columbia borders the province of Alberta to the east; the territories of Yukon and Northwest Territories to the north; the U.S. states of Washington (state), Washington, Idaho and Montana to the south, and Alaska to the northwest. With an estimated population of over 5.7million as of 2025, it is Canada's Population of Canada by province and territory, third-most populous province. The capital of British Columbia is Victoria, British Columbia, Victoria, while the province's largest city is Vancouver. Vancouver and its suburbs together make up List of census metropolitan areas and agglomerations in Canada, the third-largest metropolit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epicuticular Wax
Epicuticular wax is a waxy coating which covers the outer surface of the plant cuticle in land plants. It may form a whitish film or bloom on leaves, fruits and other plant organs. Chemically, it consists of hydrophobic organic compounds, mainly straight-chain aliphatic hydrocarbons with or without a variety of substituted functional groups. The main functions of the epicuticular wax are to decrease surface wetting and moisture loss. Other functions include reflection of ultraviolet light, assisting in the formation of an ultra-hydrophobic and self-cleaning surface and acting as an anti-climb surface. Chemical composition Common constituents of epicuticular wax are predominantly straight-chain aliphatic hydrocarbons that may be saturated or unsaturated and contain a variety of functional groups, such as -Hydroxy group, hydroxyl, carboxyl, and -Ketone, ketoyl at the terminal position. This broadens the spectrum of wax composition to Fatty acid, fatty acids, Primary alcohol, primary ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Notholaena
''Notholaena'' is a genus of ferns known as cloak ferns in the family Pteridaceae. Species of this genus are mostly epipetric (growing on rock) or occurring in coarse, gravelly soils, and are most abundant and diverse in the mountain ranges of warm arid or semiarid regions. They typically have a creeping or erect rhizome and leaves that are pinnatifid to pinnate-pinnatifid with marginal sori protected by a false indusium formed from the reflexed margin of the leaf. Members of the genus ''Notholaena'' also has a coating of whitish or yellowish farina (a powdery secretion of lipophilic exudates), primarily on the abaxial {{Short pages monitor [Baidu] |
Cheilanthoideae
Cheilanthoideae is one of the five subfamilies of the fern family Pteridaceae. The subfamily is understood to be monophyletic, but some of the genera as currently defined are not. Most species are xeric-adapted, and the subfamily is most diverse in dry areas. Phylogenic relationships The following phylogram shows a likely relationship between Cheilanthoideae and the other Pteridaceae subfamilies. Although subfamily Cheilanthoideae itself is thought to be monophyletic, many of the genera into which it has been divided (including ''Cheilanthes'', ''Doryopteris'', ''Notholaena'', and ''Pellaea'') have been shown to be polyphyletic. Genera The division of the subfamily Cheilanthoideae into genera and species remains uncertain . Christenhusz et al. (2011), the Pteridophyte Phylogeny Group classification of 2016 (PPG I), and the November 2019 version of the ''Checklist of Ferns and Lycophytes of the World'' (''World Ferns'' 8.11) agree on the following genera: * '' Adiantopsis' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentagramma Glanduloviscida
''Pentagramma'' is a small genus of North American ferns in the family Pteridaceae. Until 1990 members of this genus were included in ''Pityrogramma'', and there has been considerable disagreement regarding the species' taxonomy. In the most recent treatment, six diploid species are recognized. The distribution of ''P. triangularis'' (goldback fern) extends from British Columbia through the western United States into Baja California in northwestern Mexico.C.Michael Hogan, ed. 2010.‘’Pentagramma triangularis’’ . Encyclopedia of Life./ref> ''Pentagramma maxonii'' occurs in New Mexico, Arizona, Sonora, Baja California Sur, California, and Baja California. All other species are restricted to California and Baja California. Members of the genus ''Pentagramma'' produce a powdery-waxy secretion on their lower leaf surfaces, called farina. This character is shared with the related genus ''Notholaena''and other members of the Cheilanthoideae. Species , the ''Checklist of Ferns ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
