Weissia occidentalis

(Flowers) A. H. Stoneburner

Bryologist 88: 310. 1986,.

Basionym: Astomum occidentale Flowers Bryologist 76: 286. 1973
Treatment appears in FNA Volume 27. Treatment on page 515. Mentioned on page 513.

Leaves short-lanceolate to elliptic, base weakly or not differentiated in shape, shoulders absent, distal laminal margins sharply incurved or inrolled, apex plane to channeled, acute, mucro usually weak, of 1–3 cells; costal adaxial stereid band smaller than the abaxial; distal laminal cells 7–10 µm wide. Sexual condition autoicous or paroicous. Seta elongate, 0.1–0.15 cm. Capsule cleistocarpic, short-elliptic, operculum not differentiated, peristome absent.


Elevation: High elevations (1800 m).

Discussion

Weissia occidentalis is known only from the type collection (Millard County, House Mountains, Swasey Gulch, 1800 m, Flowers 2339, COLO). It has the leaves typical of W. ligulifolia, these being long-elliptical and sharply incurved distally. Weissia inoperculata is superficially similar in its cleistocarpic capsule and elongate seta, but differs by the longer seta and leaves similar to those of Trichostomum brachydontium—stoutly mucronate, broadly elliptical and nearly plane throughout.

Selected References

None.

Lower Taxa

None.
... more about "Weissia occidentalis"
not differentiated +
long-excurrent +  and short-excurrent +
Acute (?) +, Plane (?) +  and Channeled (?) +
Richard H. Zander +
(Flowers) A. H. Stoneburner +
crescent +
smaller +
rhomboid +  and rectangular +
papillose +  and smooth +
usually slightly wider +
not differentiated +
differentiated +
Astomum occidentale +
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 +
paroicous +, autoicous +  and sexual +
erect +  and incurved +
subquadrate;hexagonal +
High elevations (1800 m). +
differentiated +
multicellular +
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 />) +
short-lanceolate +  and elliptic +
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 +
not differentiated +
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 +
straight +
elongate +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 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 />) +
Astomum +, Hymenostomum +, Weissia sect. Astomum +, Weissia subg. Astomum +  and Weissia subg. Hymenostomum +
Weissia occidentalis +
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 +