Flora of North America species comparison

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Sematophyllum demissum

sematophyllum moss
Habit Plants small to medium-sized, green to yellow-green, glossy.
Stems

0.5–2.5 cm, branches sometimes ascending.
Leaves

straight or occasionally homomallous, oblong-ovate, tapering gradually to apex, 1–1.2 mm;

margins reflexed proximally;

apex acute;

alar cells enlarged, inflated, yellow, in 1 row, supra-alar cells few, quadrate to short;

laminal cells rhombic to flexuose.
Seta

0.8–1.2 cm.
Capsule

inclined to horizontal, 1 mm.
Specialized

asexual reproduction absent.

Sematophyllum demissum
Phenology Capsules mature summer.
Habitat Wet siliceous rock near streams
Elevation low to moderate elevations
Distribution
from FNA
AL; AR; CT; FL; GA; IA; KS; LA; MI; MO; NC; NY; OH; OK; PA; SC; TN; NS
Discussion

Sematophyllum demissum resembles Hageniella micans in many respects, but H. micans is distinguished by its strong double costa and toothed acumen. Also, exothecial cells of Sematophyllum are collenchymatous; those of Hageniella are not.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 28, p. 574.
Parent taxa Sematophyllaceae > Sematophyllum
Sibling taxa
S. adnatum, S. marylandicum, S. subpinnatum
Synonyms Hypnum demissum, H. carolinianum, S. carolinianum
Name authority (Wilson) Mitten: J. Linn. Soc., Bot. 8: 5. (1864)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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