Thelia hirtella

(Hedwig) Sullivant in A. Gray

in A. Gray, Manual ed. 2, 660. 1856.

Basionym: Pterigynandrum hirtellum Hedwig Sp. Musc. Frond., 83, plate 17, figs. 1 – 6. 1801
Treatment appears in FNA Volume 28. Treatment on page 639. Mentioned on page 638.

Stems creeping, sparsely and irregularly 1-pinnate, lightly tomentose, branches simple; paraphyllia subfoliose; pseudoparaphyllia foliose-ciliate. Stem and branch leaves dimorphic. Stem-leaves 1–1.3 mm; margins plane throughout or erect to somewhat incurved basally, plane distally, densely long-ciliate; apex broadly acute, acumen sometimes spreading-piliferous; laminal cells rhombic to fusiform, 14–30 × 3–10 µm, papillae simple. Branch leaves 0.6–0.9 mm; margins dentate-toothed basally, sharply serrate distally; medial and apical laminal cells rhombic, 14–20 × 3–8 µm; juxtacostal basal-cells fusiform, smooth, walls sometimes porose. Seta 0.4–1.2 cm. Capsule 1–2 mm; operculum 0.8–1 mm. Calyptra 2–2.5 mm. Spores 12–16 µm.


Habitat: Tree trunks, rotting stumps, humus, soil, base of trees, rock
Elevation: low to moderate elevations (0-1300 m)

Distribution

V28 1002-distribution-map.gif

N.B., N.S., Ont., Que., Ala., Ark., Conn., Del., Fla., Ga., Ill., Ind., Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., Tenn., Tex., Va., W.Va., Wis., Mexico (Tamaulipas), West Indies (Dominican Republic)

Discussion

Thelia hirtella has the broadest distribution of any Thelia species, ranging from southern Nova Scotia south to Florida and west to eastern Oklahoma, eastern Texas, and northeastern Mexico. The deltoid leaves of T. hirtella are decurrent and abruptly contracted distally into long, piliferous (at times spreading) apices. The stem leaf margins are long-ciliate, but those of the branch leaves are dentate-toothed at base and sharply serrate distally. Thelia hirtella has rhombic distal laminal cells with stout, unbranched, columnar papillae on the dorsal side, but the cell walls are smooth to somewhat bulging on the ventral side. The costae in T. hirtella are faint and often spurred or 2-fid.

Selected References

None.

Lower Taxa

None.

"-fid" is not declared as a valid unit of measurement for this property. "spurred" is not a number.

... more about "Thelia hirtella"
spreading-piliferous +
3-seriate +  and 2-seriate +
Bruce H. Allen +
(Hedwig) Sullivant in A. Gray +
decurrent +
Pterigynandrum hirtellum +
concave +  and erect-swollen +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
erect-ascending +
cucullate +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
smooth;weakly wrinkled +
cylindric;ovoid-cylindric +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
subrectangular +  and quadrate +
2 (?) +  and 1 (?) +
1/2 +  and 3/4 +
N.B. +, N.S. +, Ont. +, Que. +, Ala. +, Ark. +, Conn. +, Del. +, Fla. +, Ga. +, Ill. +, Ind. +, Kans. +, Ky. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, R.I. +, S.C. +, Tenn. +, Tex. +, Va. +, W.Va. +, Wis. +, Mexico (Tamaulipas) +  and West Indies (Dominican Republic) +
low to moderate elevations (0-1300 m) +
Tree trunks, rotting stumps, humus, soil, base of trees, rock +
0.1 cm1 mm <br />0.001 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
deltoid-ovate +
incurved +  and erect to somewhat +
dentate-toothed +  and plane +
oblate;quadrate +
conic-subulate +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
in A. Gray, Manual ed. +
reddish-brown +
red +  and yellowish +
flexuose +
elongate +
0.4 cm4 mm <br />0.004 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
branched +  and 1-pinnate +
ascending +  and creeping +
concave +  and erect-swollen +
Thelia hirtella +
species +
thin;thick +
dark green +, yellowish gray +  and bluish gray +
small;medium-sized +