Timmiella crassinervis

(Hampe) L. F. Koch

Leafl. W. Bot. 6: 11. 1950,.

Basionym: Trichostomum crassinerve Hampe Linnaea 30: 456. 1860
Synonyms: Timmiella flexiseta var. vancouveriensis (Brotherus) Grout Timmiella
Treatment appears in FNA Volume 27. Treatment on page 482.

Stems commonly unbranched. Leaf base distinctly and rather abruptly wider than the limb. Sexual condition dioicous. Seta 0.8–1.2 cm. Capsule with theca usually 2–2.8 mm, operculum 0.6–1 mm, peristome not or slightly twisted.


Phenology: Sporophytes mature spring–summer.
Habitat: Soil, clay, roadside banks
Elevation: low to moderate elevations (150-1500 m)

Distribution

V27 698-distribution-map.gif

B.C., Ariz., Calif., Mont., Oreg., Wash., Pacific Islands (Hawaii)

Discussion

Timmiella crassinervis is very similar to the European T. flexiseta (Bruch) Limpricht, and commonly matches the key traits (stems to ca. 1 cm, leaf margins dentate only near apex, peristome teeth short-filiform, erect) of T. diminuta (Müller Hal.) P. C. Chen of Asia as given by Li X. J. et al. (2001). Revision may result in synonymy. Sterile plants of the two species of the flora are not easily distinguishable even by the leaf base characteristics; see discussions by R. H. Zander (1994b) and D. H. Norris and J. R. Shevock (2004). Although several authors indicate that T. crassinervis differs from T. anomala by a peristome that is straight while that of the latter is twisted at least once, E. Lawton (1971) described the peristome as “slightly twisted” and distinguished T. crassinervis by its smaller size, unbranched stem, and dioicous condition. According to Norris and Shevock, in California where the two species co-occur, T. crassinervis is more common in the humid northwest of the state.

Selected References

None.

Lower Taxa

None.

"um" is not declared as a valid unit of measurement for this property.

... more about "Timmiella crassinervis"
3-stratose +  and 2-stratose +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
distinct +
of 1;several layers +
of 1-2 rows +  and differentiated +
long-excurrent +  and short-excurrent +
Richard H. Zander +
(Hampe) L. F. Koch +
crescent--shaped +
papillose +  and smooth +
usually slightly wider +
usually ovate;oblong +
broadened +
Trichostomum crassinerve +
obovoid +
cucullate +
stegocarpous +
monoicous +, dioicous +  and sexual +
flat to bulging +
vesiculose +  and 2-stratose +
specialized +
monoicous +, dioicous +  and not asexual +
elongate-rhomboid +  and elongate +
tomentose +  and bare +
tapering +
broadened +
serrate +  and serrulate +
denticulate +  and plane +
quadrate;rounded-hexagonal +
B.C. +, Ariz. +, Calif. +, Mont. +, Oreg. +, Wash. +  and Pacific Islands (Hawaii) +
low to moderate elevations (150-1500 m) +
differentiated +
multicellular +
Soil, clay, roadside banks +
yellow +  and orange-red or red +
1-stratose +  and 2-stratose +
1 +  and several +
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 +
dioicous +  and sexual +
rather abruptly wider +
lanceolate +
reduced +
rounded +
dentate +  and entire +
long-conic;rostrate +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
photosynthetic +
compound +, simple +, hollow +  and solid +
flattened +  and 2-fid +
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 +
Sporophytes mature spring–summer. +
1 (?) +, 3 (?) +  and 4 (?) +
Leafl. W. Bot. +
straight +
elongate +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
2 +  and 1 +
yellow +  and laminal +
rounded-triangular +  and rounded-pentagonal +
0 cm0 mm <br />0 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Timmiella flexiseta var. vancouveriensis +  and Timmiella +
Timmiella crassinervis +
Timmiella +
species +
ventricose;long-elliptic;cylindric +
0.2 cm2 mm <br />0.002 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
straight +
hyaline +  and yellowish +
wasp-waisted +  and lanceolate +
stemless +  and perigoniate +
plant +, loosely cespitose +  and cushion-forming +
occasionally smaller than the perichaetiate +