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sematophyllum moss

Maryland sematophyllum moss

Habit Plants small to medium-sized, green to yellow-green, glossy. Plants medium-sized to large, green, yellow-green, or golden brown, glossy.
Stems

0.5–2.5 cm, branches sometimes ascending.

3–5 cm, branches creeping.

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, oblong-ovate, tapering gradually to apex, 1.5–2 mm;

margins plane;

apex sometimes apiculate;

alar cells conspicuously enlarged, inflated, yellow to yellow-orange or unpigmented, in several rows, supra-alar cells few, rhomboid;

laminal cells flexuose.

Seta

0.8–1.2 cm.

1–2 cm.

Capsule

inclined to horizontal, 1 mm.

inclined to horizontal, 1–1.2 mm.

Specialized

asexual reproduction absent.

asexual reproduction absent.

Sematophyllum demissum

Sematophyllum marylandicum

Phenology Capsules mature summer. Capsules mature spring.
Habitat Wet siliceous rock near streams Wet rock, by streams, cliffs
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; CT; GA; KY; MD; NC; NY; OH; PA; TN; VT; WV; NF; 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. FNA vol. 28, p. 574.
Parent taxa Sematophyllaceae > Sematophyllum Sematophyllaceae > Sematophyllum
Sibling taxa
S. adnatum, S. marylandicum, S. subpinnatum
S. adnatum, S. demissum, S. subpinnatum
Synonyms Hypnum demissum, H. carolinianum, S. carolinianum Hypnum marylandicum
Name authority (Wilson) Mitten: J. Linn. Soc., Bot. 8: 5. (1864) (Müller Hal.) E. Britton: Bryologist 5: 66. (1902)
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