Weissia jamaicensis

(Mitten) Grout

Moss Fl. N. Amer. 1: 157. 1938,.

Basionym: Tortula jamaicensis Mitten J. Linn. Soc., Bot. 12: 147. 1869
Synonyms: Trichostomum jamaicense (Mitten) A. Jaeger
Treatment appears in FNA Volume 27. Treatment on page 514. Mentioned on page 493, 499, 512, 513, 642.

Leaves longlanceolate, base strongly differentiated, rectangular, shoulders strong, distal laminal margins strongly and sharply incurved or inrolled, apex usually somewhat cucullate, acute or narrowly obtuse, mucro usually weak, of 1–3 cells; costa adaxial stereid band almost as large as or larger than the abaxial; distal laminal cells 8–11 µm wide. Sexual condition dioicous (archegoniate plants). Sporophytes absent in range of the flora.


Habitat: Sandy and calcareous soil or rock, ravine banks, roadsides, fields
Elevation: low to moderate elevations

Distribution

V27 735-distribution-map.gif

Ala., Ariz., Ark., Fla., Ga., La., Miss., Mo., Okla., Tenn., Tex., Mexico, West Indies, Central America, South America

Discussion

West Indian specimens of Weissia jamaicensis are distinct in the adaxial stereid band larger than the abaxial, the adaxial surface of the costa strongly bulging, and the strongly differentiated, sheathing leaf base with distinct shoulders and thick-walled medial cells bordered by thin-walled marginal cells running up the leaf in a V (as in Tortella). In the flora area, W. jamaicensis may exhibit an adaxial stereid band not as large as the abaxial band, and a poorly differentiated leaf base (as in Texas, Redfearn 30559, MO). Such specimens may be distinguished from the similar T. crispulum, however, by the sharply incurved distal leaf margins and bulging adaxial costal surface.

Selected References

None.

Lower Taxa

None.
... more about "Weissia jamaicensis"
not differentiated +
long-excurrent +  and short-excurrent +
Obtuse (?) +, Acute (?) +  and Cucullate (?) +
Richard H. Zander +
(Mitten) Grout +
crescent +
rhomboid +  and rectangular +
papillose +  and smooth +
usually slightly wider +
rectangular +
differentiated +
Tortula jamaicensis +
obovoid +
cucullate +
cleistocarpous +  and stegocarpous +
monoicous +, dioicous +  and sexual +
flat to bulging +
persistent +
1 (?) +  and 3 (?) +
elongate-rhomboid +  and elongate +
thicker +
tomentose +  and bare +
mucronate +
dioicous +  and sexual +
erect +  and incurved +
subquadrate;hexagonal +
Ala. +, Ariz. +, Ark. +, Fla. +, Ga. +, La. +, Miss. +, Mo. +, Okla. +, Tenn. +, Tex. +, Mexico +, West Indies +, Central America +  and South America +
low to moderate elevations +
differentiated +
multicellular +
Sandy and calcareous soil or rock, ravine banks, roadsides, fields +
yellow +  and orange-red or red +
1 +  and 2 +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
concave;keeled;channeled;ovoid;lanceolate or lingulate +
long-ligulate +
spiraled +  and contorted +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
triangular +  and oblong +
reduced +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
dentate +  and entire +
short-conic;short-rostrate +
photosynthetic +
2 +  and 6 +
dioicous +, monoicous +  and sexual +
spiculiform +  and 2-fid +
lateral +  and terminal +
lateral +  and terminal +
red +, orange +  and yellow +
oblong-truncate +  and long-triangular +
Moss Fl. N. Amer. +
straight +
elongate +
0.1 cm1 mm <br />0.001 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
2 +  and 1 +
yellow +  and laminal +
rounded-triangular +  and rounded-pentagonal +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Trichostomum jamaicense +
Weissia jamaicensis +
species +
elliptical;short-ovate or cylindric +
0.1 cm1 mm <br />0.001 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
semicircular +  and circular +
orange +  and yellow +
stemless +  and perigoniate +
brown;tan or yellow +
plant +  and cespitose +
occasionally smaller than the perichaetiate +