Physematium neomexicanum, the New Mexican cliff fern, is a fern species native to the Southwestern United States and northern Mexico.
| Physematium neomexicanum | |
|---|---|
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Division: | Polypodiophyta |
| Class: | Polypodiopsida |
| Order: | Polypodiales |
| Suborder: | Aspleniineae |
| Family: | Woodsiaceae |
| Genus: | Physematium |
| Species: | P. neomexicanum
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| Binomial name | |
| Physematium neomexicanum (Windham) Li Bing Zhang, N.T.Lu & X.F.Gao
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| Synonyms[1] | |
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Distribution edit
The core of its range is in Coahuila, Nuevo León, Zacatecas, New Mexico, southeastern Utah, Arizona, western Texas and southern Colorado, with isolated populations reported from Oklahoma and South Dakota. The plant usually grows in cracks in the sides of cliffs, on top of rocks, etc.[2][3][4]
Description edit
Physematium neomexicanum has stems that are largely obscured by the persistent bases of scales and dead leaf bases. Leaves are up to 30 cm long, pinnate with pinnatifid pinnules (leaflets) with scattered hairs.[2]
The indusia have narrow, thread-like segments. Spores average about 50 μm in diameter.[2][5][6]
References edit
- ^ Hassler, Michael. "Physematium neomexicanum". World Ferns. Retrieved 13 June 2023.
- ^ a b c Flora of North America vol 2
- ^ Mickel, J. T. & A. R. Smith. 2004. The Pteridophytes of Mexico. Memoirs of The New York Botanical Garden 88: 1–1054.
- ^ BONAP, Biota of North America Project, Floristic Synthesis map
- ^ Windham, Michael D. 1993. Contributions from the University of Michigan Herbarium 19: 52, f. 6.
- ^ photo of isotype of Physematium neomexicanum at Missouri Botanical Garden
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