Sematophyllum demissum |
Sematophyllum marylandicum |
|
---|---|---|
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 |
AL; AR; CT; FL; GA; IA; KS; LA; MI; MO; NC; NY; OH; OK; PA; SC; TN; NS |
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 | ||
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) |
Web links |