Spinulum

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Spinulum
Lycopodium annotinum 161102a.jpg
Spinulum annotinum
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Lycophytes
Class: Lycopodiopsida
Order: Lycopodiales
Family: Lycopodiaceae
Subfamily: Lycopodioideae
Genus: Spinulum
A.Haines [1]
Species

See text.

Spinulum is a genus of club mosses in the family Lycopodiaceae. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), it is placed in the subfamily Lycopodioideae. [1] Some sources do not recognize the genus, sinking it into Lycopodium . [2] Spinulum annotinum is widespread in the temperate Northern Hemisphere. [2]

Species

As of June 2024, the Checklist of Ferns and Lycophytes of the World recognized two species: [3]

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Huperzia is a genus of lycophyte plants, sometimes known as the firmosses or fir clubmosses; the Flora of North America calls them gemma fir-mosses. This genus was originally included in the related genus Lycopodium, from which it differs in having undifferentiated sporangial leaves, and the sporangia not formed into apical cones. The common name firmoss, used for some of the north temperate species, refers to their superficial resemblance to branches of fir (Abies), a conifer. As of 2020, two very different circumscriptions of the genus were in use. In the Pteridophyte Phylogeny Group classification of 2016, Huperzia is one of three genera in the subfamily Huperzioideae of the family Lycopodiaceae. Most species in the subfamily are placed in the genus Phlegmariurus. Huperzia is left with about 25 species, although not all have been formally transferred to other genera. Other sources recognize only Huperzia, which then has about 340 species.

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Spinulum annotinum, synonym Lycopodium annotinum, known as interrupted club-moss, or stiff clubmoss, is a species of clubmoss native to forests of the colder parts of North America, as well as Asia, and most of Europe. It is an evergreen perennial pteridophyte. The genus Spinulum is accepted in the Pteridophyte Phylogeny Group classification of 2016, but not in other classifications, which submerge the genus in Lycopodium.

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References

  1. 1 2 PPG I (2016). "A community-derived classification for extant lycophytes and ferns". Journal of Systematics and Evolution. 54 (6): 563–603. doi: 10.1111/jse.12229 . S2CID   39980610.
  2. 1 2 "Spinulum A.Haines", Plants of the World Online, Royal Botanic Gardens, Kew, retrieved 2019-12-09
  3. Hassler, Michael. "Spinulum". World Ferns. Retrieved 2024-06-02.