Sematophyllum demissum

(Wilson) Mitten

J. Linn. Soc., Bot. 8: 5. 1864.

Endemic
Basionym: Hypnum demissum Wilson in J. E. Smith et al., Engl. Bot., suppl. 2: plate 2740. 1832
Synonyms: H. carolinianum Müller Hal. Sematophyllum carolinianum (Müller Hal.) E. Britton
Treatment appears in FNA Volume 28. Treatment on page 574.

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. Specialized asexual reproduction absent. Seta 0.8–1.2 cm. Capsule inclined to horizontal, 1 mm.


Phenology: Capsules mature summer.
Habitat: Wet siliceous rock near streams
Elevation: low to moderate elevations

Distribution

V28 896-distribution-map.gif

N.S., Ala., Ark., Conn., Fla., Ga., Iowa, Kans., La., Mich., Mo., N.Y., N.C., Ohio, Okla., Pa., S.C., Tenn.

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.

Selected References

None.

Lower Taxa

None.
... more about "Sematophyllum demissum"
Wilfred B. Schofield† +
(Wilson) Mitten +
Hypnum demissum +
N.S. +, Ala. +, Ark. +, Conn. +, Fla. +, Ga. +, Iowa +, Kans. +, La. +, Mich. +, Mo. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, S.C. +  and Tenn. +
low to moderate elevations +
Wet siliceous rock near streams +
Capsules mature summer. +
J. Linn. Soc., Bot. +
H. carolinianum +  and Sematophyllum carolinianum +
Sematophyllum demissum +
Sematophyllum +
species +