Weissia inoperculata

(H. A. Crum) H. A. Crum

Bryologist 67: 164. 1973,.

Basionym: Hymenostomum inoperculatum H. A. Crum Madroño 14: 74, figs. 1–6. 1957
Treatment appears in FNA Volume 27. Treatment on page 518. Mentioned on page 490, 513, 515.

Leaves elliptic, base weakly or not differentiated in shape, shoulders absent, distal laminal margins plane to erect, rarely incurved, apex plane, acute to rounded-acute, mucro usually strong, of (3–) 4–6 (–7) cells; costal adaxial stereid band smaller than the abaxial; distal laminal cells 8–10 (–13) µm wide. Sexual condition dioicous (perigoniate plants mixed with the archegoniate). Seta elongate, 0.2–0.3 cm. Capsule cleistocarpic, short-elliptic, operculum weakly differentiated, peristome absent.


Phenology: Capsules mature Feb.
Habitat: Garden, soil
Elevation: moderate elevation

Discussion

Weissia inoperculata is known only from the type specimen (Stanford University, Santa Clara County). It has a gametophyte much like that of Trichostomum brachydontium and may prove better placed in Trichostomum. The operculum is weakly marked off by a ring of several rows of small cells.

Selected References

None.

Lower Taxa

None.
... more about "Weissia inoperculata"
not differentiated +
long-excurrent +  and short-excurrent +
Richard H. Zander +
(H. A. Crum) H. A. Crum +
crescent +
smaller +
rhomboid +  and rectangular +
papillose +  and smooth +
usually slightly wider +
not differentiated +
differentiated +
Hymenostomum inoperculatum +
obovoid +
cucullate +
cleistocarpous +  and stegocarpous +
monoicous +, dioicous +  and sexual +
flat to bulging +
persistent +
4 (?) +  and 6 (?) +
elongate-rhomboid +  and elongate +
thicker +
tomentose +  and bare +
mucronate +
dioicous +  and sexual +
erect +  and incurved +
subquadrate;hexagonal +
moderate elevation +
differentiated +
multicellular +
Garden, soil +
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 +
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 +
Capsules mature Feb. +
straight +
elongate +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 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 inoperculata +
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 +