Triquetrella californica

(Lesquereux) Grout

Moss Fl. N. Amer. 3: 201. 1934,.

Basionym: Anomodon californicus Lesquereux Mem. Calif. Acad. Sci. 1: 30. 1868
Treatment appears in FNA Volume 27. Treatment on page 581. Mentioned on page 557.

Stems to 2.5 cm, rounded-triangular to rounded-pentagonal in cross-section. Leaves ovate, very short-acuminate, 1.3—1.7 mm, spreading when moist, margins entire, decurrent, papillae short-columnar; costa adaxial stereid band absent or weak, guides cells usually 2. Sporophytes not seen.


Habitat: Roadsides, hillsides, rocky slopes, fields, chaparral
Elevation: low to moderate elevations (50-500 m)

Discussion

Triquetrella californica in distinctive in its distal leaf margins sharply crenulate by projecting papillae (but not by projecting cell walls as in Didymodon nigrescens), and distal medial laminal papillae tall, branching from the base, and centered over each lumen. The leaves are decurrent on the margins, and arranged in 3 distinct rows on the stem—either straight or weakly spiraling in either direction. This rare species is easily confused with Didymodon ferrugineus, which has a rounded-pentagonal stem cross section, leaves in 3–5 rows, leaf margins weakly recurved, leaf cells smaller, and abaxial surface of the costa less papillose. Perigoniate plants have not been found in the flora area.

Selected References

None.

Lower Taxa

None.
... more about "Triquetrella californica"
channeled +  and keeled +
2 cm20 mm <br />0.02 m <br /> (?) +
of 1-2 rows +  and differentiated +
long-excurrent +  and short-excurrent +
Richard H. Zander +
(Lesquereux) Grout +
crescentic +  and circular +
papillose +  and smooth +
usually slightly wider +
Anomodon californicus +
obovoid +
mitrate +  and cucullate +
cleistocarpous +  and stegocarpous +
orange +  and yellowish orange +
weakly convex +  and distinctly bulging +
thick-walled +
Few (?) +  and Several (?) +
elongate-rhomboid +  and elongate +
tomentose +  and bare +
entire +  and weakly serrulate +
rhombic;quadrate +
Calif. +  and Oreg. +
low to moderate elevations (50-500 m) +
differentiated +
multicellular +
Roadsides, hillsides, rocky slopes, fields, chaparral +
yellow +  and orange-red or red +
1 +  and 3 +
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 +
short-acuminate +  and ovate +
reduced +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
decurrent +
short-conic;short-rostrate +
photosynthetic +
simple +  and spiculose +
short-columnar +
lateral +  and terminal +
lateral +  and terminal +
red +, orange +  and yellow +
consisting of 16 mostly 2 times cleft spiculose striate or papillose lanceolate teeth , , , , +  and rudimentary +
porose +  and thick-walled +
1 (?) +, 2 (?) +  and 4 (?) +
Moss Fl. N. Amer. +
straight +
elongate +
2 +  and 1 +
rounded-triangular +  and rounded-pentagonal +
0 cm0 mm <br />0 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Triquetrella californica +
Triquetrella +
species +
ovoid;cylindric +
red +  and yellow +
stemless +  and perigoniate +
blackish;brown;,;blackish green;yellowish +
occasionally smaller than the perichaetiate +