Flora of North America species comparison

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Sematophyllum demissum

Sematophyllum adnatum

sematophyllum moss

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

0.5–2.5 cm, branches sometimes ascending.

2–3 cm, branches 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.

erect to erect-spreading, sometimes homomallous, oblong-lanceolate, tapering gradually to apex, 1–1.5 mm;

margins reflexed;

apex gradually acuminate;

alar cells enlarged, inflated, yellow, in 1 row, supra-alar cells several in 2 rows, quadrate to short-rectangular;

laminal cells long-rhomboidal.
Seta

0.8–1.2 cm.

0.4–0.8 cm.
Capsule

inclined to horizontal, 1 mm.

erect, 1 mm.
Specialized

asexual reproduction absent.

asexual reproduction rare, by axillary propagula, 1-seriate, rough, branched or unbranched.

Sematophyllum demissum

Sematophyllum adnatum
Phenology Capsules mature summer. Capsules mature fall.
Habitat Wet siliceous rock near streams Logs, bark of tree bases, rock, swamps
Elevation low to moderate elevations 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
from FNA
AL; CA; GA; LA; NC; NY; OH; PA; SC; TN; VA; WV; Mexico; Central America; South America
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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.)

Sematophyllum adnatum resembles Pylaisia (Hypnaceae) in habit, but is distinguished by its strongly differentiated, elongate (not isodiametric) alar cells. The species is introduced in California.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 28, p. 574. FNA vol. 28, p. 574.
Parent taxa Sematophyllaceae > Sematophyllum Sematophyllaceae > Sematophyllum
Sibling taxa
S. adnatum, S. marylandicum, S. subpinnatum
S. demissum, S. marylandicum, S. subpinnatum
Synonyms Hypnum demissum, H. carolinianum, S. carolinianum Leskea adnata
Name authority (Wilson) Mitten: J. Linn. Soc., Bot. 8: 5. (1864) (Michaux) E. Britton: Bryologist 5: 65. (1902)
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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