Selaginella rupestris (L.) Spring - Rock Spikemoss


 

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Selaginella rupestris - (image 1 of 3)

 

Taxonomy

Family: Selaginellaceae

Habitat

On rock or in sandy or gravelly. Can occur on acid substrates but also on limestone.

Associates

 

 Distribution

Southern Greenland to northeast Alberta, south to northern GA and OK.

Morphology

Stems branched and with numerous rhizophores, creeping and erect branches similar; erect stems to 6 cm, with tetragonous cones 1-1.5 cm long; leaves spirally arranged, appressed, firm, subulate, ciliolate, 1.5-2 mm long, with a scabrous slender white bristle 1-1.5 mm at the apex; sporophylls 4-ranked, broader than the leaves; megaspores yellowish, 0.5 mm wide. 

Notes

Spores produced June to July

Wetland indicator: UPL

A drought adapted, mat forming species.

References

Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second Ed.

The New York Botanical Garden. Bronx, NY

 


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 Michael Hough 2018