Gemmabryum coronatum

(Schwagrichen) J. R. Spence & H. P. Ramsay

Phytologia 87: 66. 2005.

Basionym: Bryum coronatum Schwägrichen Sp. Musc. Frond. Suppl. 1(2): 103, plate 71 [top]. 1816
Treatment appears in FNA Volume 28. Treatment on page 134. Mentioned on page 133.

Plants green or yellow-green. Stems 0.5–1(–2) cm, gemmiform to evenly foliate. Leaves ovate-lanceolate to triangular, weakly concave, 0.5–1.5(–2) mm; margins revolute to mid leaf or beyond; apex acute to acuminate; costa short-excurrent; proximal laminal cells abruptly quadrate to short-rectangular, 1–2:1; medial and distal cells 8–12(–16) µm wide, 3–4:1. Specialized asexual reproduction by leaf axil bulbils, bulbils 1 (or 2) per axil, elongate-ovate, 250–750 µm, primordia present, broadly triangular, acute, arising from just below mid bulbil or near base. Capsule nutant, purple-red at maturity, 1–3(–4) mm; hypophysis strongly thickened, inflated, strongly rugose; peristome well developed; endostome not adherent to exostome, basal membrane high, segments well developed, perforations ovate, cilia long, appendiculate.

Phenology: Capsules mature Apr–Jul (spring–summer).
Habitat: Moist soil, soil over rock
Elevation: low to moderate elevations (0-500 m)


V28 210-distribution-map.gif

Ala., Fla., Ga., La., Miss., S.C., Tex., Mexico, West Indies, Central America, South America, se Asia (including Indonesia), Africa, Pacific Islands, Australia.


Gemmabryum coronatum is similar to G. dichotomum but tropical-subtropical to warm-temperate in distribution, with strongly revolute leaf margins and often triangular leaves. Another feature is the strongly thickened hypophysis, almost as though inflated and distinctly rugose, which in G. dichotomum is less thickened and more or less smooth.

Selected References


Lower Taxa

... more about "Gemmabryum coronatum"
John R. Spence +
(Schwagrichen) J. R. Spence & H. P. Ramsay +
Bryum coronatum +
Ala. +, Fla. +, Ga. +, La. +, Miss. +, S.C. +, Tex. +, Mexico +, West Indies +, Central America +, South America +, se Asia (including Indonesia) +, Africa +, Pacific Islands +  and Australia. +
low to moderate elevations (0-500 m) +
Moist soil, soil over rock +
Capsules mature Apr–Jul (spring–summer). +
Gemmabryum coronatum +
Gemmabryum sect. Gemmabryum +
species +