Weissia muhlenbergiana

(Swartz) W. D. Reese & B. A. E. Lemmon

Bryologist 68: 282. 1965 (as muehlenbergiana),.

Basionym: Phascum muhlenbergianum Swartz Adnot. Bot., 74. 1829
Synonyms: Astomum muhlenbergianum (Swartz) Grout
Treatment appears in FNA Volume 27. Treatment on page 517. Mentioned on page 513, 516.

Leaves longlanceolate, base little differentiated to triangular or narrowly elliptic, shoulders absent, distal laminal margins plane or erect, apex broadly channeled or plane, acute, mucro very strong, of 6–10 (–14) cells; costal adaxial stereid band smaller than the abaxial; distal laminal cells 8–10 µm wide. Sexual condition cladautoicous. Seta very short, less than 0.05 cm not including the vaginula. Capsule cleistocarpic, round, with a short-rostrate or conic, occasionally angled or curved apiculus.


Phenology: Capsules mature winter–spring.
Habitat: Soil, lawns, fields, among grasses, roadsides
Elevation: moderate elevations

Distribution

V27 743-distribution-map.gif

Man., N.S., Ont., Que., Sask., Ala., Ariz., Fla., Ill., Iowa, Kans., Ky., La., Mass., Mich., Miss., N.Y., N.C., Ohio, Okla., Pa., S.C., Tenn., Tex., Va., Wis., e Asia

Discussion

As with Weissia ludoviciana, the gametophyte of W. muhlenbergiana is like that of W. brachycarpa, but differs to some extent in the distal leaf margins occasionally sharply inflexed. If the sporophyte has a hybrid origin, then the archegoniate parent has characteristics of both W. controversa and W. brachycarpa. The hybrid W. muehlenbergiana × W. controversa was reported by C. Williams (1966).

Selected References

None.

Lower Taxa

None.
... more about "Weissia muhlenbergiana"
not differentiated +
long-excurrent +  and short-excurrent +
Acute (?) +, Plane (?) +  and Channeled (?) +
angled +, conic +  and short-rostrate +
Richard H. Zander +
(Swartz) W. D. Reese & B. A. E. Lemmon +
crescent +
smaller +
rhomboid +  and rectangular +
papillose +  and smooth +
usually slightly wider +
elliptic;triangular +
differentiated +
Phascum muhlenbergianum +
obovoid +
cucullate +
cleistocarpous +  and stegocarpous +
monoicous +, dioicous +  and sexual +
flat to bulging +
persistent +
6 (?) +  and 10 (?) +
elongate-rhomboid +  and elongate +
thicker +
tomentose +  and bare +
mucronate +
cladautoicous +  and sexual +
erect +  and incurved +
subquadrate;hexagonal +
Man. +, N.S. +, Ont. +, Que. +, Sask. +, Ala. +, Ariz. +, Fla. +, Ill. +, Iowa +, Kans. +, Ky. +, La. +, Mass. +, Mich. +, Miss. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, S.C. +, Tenn. +, Tex. +, Va. +, Wis. +  and e Asia +
moderate elevations +
differentiated +
multicellular +
Soil, lawns, fields, among grasses, roadsides +
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 +
Capsules mature winter–spring. +
straight +
elongate +
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 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 muhlenbergianum +
Weissia muhlenbergiana +
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 +