Weissia ludoviciana

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

Bryologist 68: 282. 1965,.

Basionym: Phascum ludovicianum Sullivant in A. Gray, Manual ed. 2, 616. 1856
Synonyms: Astomum ludovicianum (Sullivant) Sullivant
Treatment appears in FNA Volume 27. Treatment on page 516. Mentioned on page 513, 517.

Leaves longlanceolate, base long-elliptic or narrowly ovate, shoulders absent, distal laminal margins plane or erect, apex broadly channeled, acute, mucro very strong, of 7–10 (–14) cells; costal adaxial stereid band smaller than the abaxial; distal laminal cells 8–10 (–12) µm wide. Sexual condition rhizautoicous. Seta short, 0.08–0.015 cm not including the vaginula. Capsule cleistocarpic, ovoid with a short-rostrate apiculus.


Phenology: Capsules mature fall–spring.
Habitat: Moist soil, fields, among grasses, roadside banks
Elevation: low to moderate elevations

Distribution

V27 742-distribution-map.gif

Ala., Ark., Fla., Ky., La., Miss., N.C., S.C., Tex., Va., W.Va.

Discussion

The gametophyte of Weissia ludoviciana is quite like that of W. brachycarpa. If it has a hybrid origin, then the archegoniate parent is the latter species. Weissia ludoviciana, W. muehlenbergiana, and W. phascopsis are similar in the short-seta, cleistocarpic capsules and long-lanceolate leaves, but differ most constantly in the traits given in the key. Additional differences observed, which may prove inconstant on revision, are: W. ludoviciana is rhizautoicous, with antheridia in extremely small, serrate-leaved buds, on soil near base of the archegoniophore, the capsule has stomates and a weakly differentiated annulus of 3–4 rows of smaller cells, and the calyptra is ca. 1 mm; W. muehlenbergiana is cladautoicous, the capsule lacks stomates and an annulus is not distinguishable, and the calyptra is 0.5–0.6 mm; W. phascopsis is cladautoicous, the capsule has stomates and the annulus somewhat differentiated as a ridge, and the calyptra is 1.2–1.4 mm. The hybrid Weissia ludoviciana × W. controversa was reported by W. D. Reese and B. E. Lemmon (1965).

Selected References

None.

Lower Taxa

None.
... more about "Weissia ludoviciana"
not differentiated +
long-excurrent +  and short-excurrent +
Acute (?) +  and Channeled (?) +
short-rostrate +
Richard H. Zander +
(Sullivant) W. D. Reese & B. A. E. Lemmon +
crescent +
smaller +
rhomboid +  and rectangular +
papillose +  and smooth +
usually slightly wider +
ovate;long-elliptic +
differentiated +
Phascum ludovicianum +
obovoid +
cucullate +
cleistocarpous +  and stegocarpous +
monoicous +, dioicous +  and sexual +
flat to bulging +
persistent +
7 (?) +  and 10 (?) +
elongate-rhomboid +  and elongate +
thicker +
tomentose +  and bare +
mucronate +
erect +  and incurved +
subquadrate;hexagonal +
Ala. +, Ark. +, Fla. +, Ky. +, La. +, Miss. +, N.C. +, S.C. +, Tex. +, Va. +  and W.Va. +
low to moderate elevations +
differentiated +
multicellular +
Moist soil, fields, among grasses, roadside banks +
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 fall–spring. +
straight +
elongate +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.015 cm0.15 mm <br />1.5e-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 ludovicianum +
Weissia ludoviciana +
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 +