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Diphasiastrum
Also called False Diphasium, Ground Cedar, Ground Cedars
Diphasiastrum is a genus of clubmosses in the plant family Lycopodiaceae. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), it is placed in the subfamily Lycopodioideae. It is closely related to the genus Lycopodium, and some botanists treat it within a broad view of that genus as a section, Lycopodium sect. Complanata. Plants of the World Online (POWO), for example, considers Diphasiastrum to be a synonym of the genus Lycopodium. The genus was first proposed by Josef Holub in 1975, who characterized the species by their dorsiventral structure of branchlets, their chromosome number, and their special type of prothallium. Some species superficially resemble diminutive gymnosperms and have been given common names such as ground-pine or ground-cedar.
The genus has a subcosmopolitan distribution, in much of the Northern Hemisphere, south in mountains to South America (reaching furthest south in Jujuy Province, northwest Argentina), New Guinea and the Marquesas Islands in the Pacific Ocean, but confined to climates with high humidity for most or all of the year (or, in cool climates, protected by snow cover in winter).
Alpine clubmoss · Complanate clubmoss · Fan Clubmoss · Diphasiastrum issleri · Diphasiastrum multispicatum · Savinleaf Groundpine · Alaskan Clubmoss · Deeproot Clubmoss
Text excerpted from the Wikipedia article Diphasiastrum by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
