Hygrohypnum closteri

(Austin) Grout

Bryologist 13: 14. 1910.

Endemic
Basionym: Hypnum closteri Austin Musci Appalach., 439. 1870
Synonyms: Amblystegium holzingeri Renauld & Cardot H. malacocladum Cardot & Thériot
Treatment appears in FNA Volume 28. Treatment on page 273. Mentioned on page 271.

Plants soft, spindly, dirty green. Stems to 15 cm, frequently denuded basally, irregularly branched; hyalodermis absent, epidermal-cells small, walls thick, similar to subadjacent cortical cells, central strand well developed. Leaves somewhat erect-spreading, uniformly straight, markedly shrunken and twisted when dry, loosely patent when moist, narrowly ovate, ovatelanceolate, or lanceolate, plane or rarely weakly concave, (0.3–) 0.6–0.9 (–1.7) × (0.2–) 0.3–0.4 (–0.8) mm; margins plane, entire; apex acute; costa usually single to 1/3–1/2 leaf length, much less frequently double and short, or single and 2-fid; alar region usually little differentiated, or cells few, quadrate or short-rectangular; basal laminal cells similar to medial cells or shorter, wider; medial cells fusiform or rhombic, straight or flexuose, sometimes linear-flexuose, (23–) 30–50 (–63) × (4–) 6–7 (–13) µm; apical cells shorter; marginal cells rarely longer than 55 µm. Sexual condition autoicous; perigonia and perichaetia occurring individually or in 1-sexual or 2-sexual pairs; perichaetial inner leaves triangular-lanceolate, not plicate, margins plane, costa single. Seta yellowish or yellowish red, 0.7–1 cm. Capsule with endostome cilia 1–3.


Habitat: Irrigated or submerged rock in streams
Elevation: low to moderate elevations (20-1500 m)

Distribution

V28 426-distribution-map.gif

D.C., Maine, N.Y., N.C., Pa., Vt.

Discussion

Hygrohypnum closteri is so unlike the main body of Hygrohypnum that it is surely ill-placed in the genus; the author and others have noted its Amblystegium-like appearance. The prostrate to somewhat ascending stems have distantly spaced leaves.

Selected References

None.

Lower Taxa

None.

No values specified."narrower" is not a number.

... more about "Hygrohypnum closteri"
not differentiated +
not +  and separating +
David W. Jamieson +
(Austin) Grout +
decurrent +
Hypnum closteri +
cucullate +
curved +  and straight +
inclined +  and erect +
ovoid +  and oblong-cylindric +
bright red +, reddish-brown +, brown +, yellowbrown +  and hyaline +
little +  and undifferentiated +
short-rectangular +  and quadrate +
enlarged +
differentiated +
appendiculate +
single +, 0 +  and 1/3-1/2 +
stout +  and slender +
D.C. +, Maine +, N.Y. +, N.C. +, Pa. +  and Vt. +
low to moderate elevations (20-1500 m) +
brownish +  and yellowbrown +
short +  and narrow +
Irrigated or submerged rock in streams +
falcate-secund +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
straight +
patent +  and erect-spreading +
2-fid +, concave +, plane +, lanceolate +, ovatelanceolate +  and ovate +
shrunken +
1 cm10 mm <br />0.01 m <br /> (?) +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
autoicous +  and sexual +
linear-flexuose +, flexuose +  and straight +
multistratose +  and 1-stratose +
fusiform +  and short-rhombic +
short-rostrate +, rostrate +  and conic +
2-sexual +  and 1-sexual +
obovate +, oblong +, ovate +  and lanceolate +
large +  and small +
differentiated +
warty-papillose +  and smooth +
warty-papillose +  and smooth +
yellowish red +  and yellowish +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0 cm0 mm <br />0 m <br /> (15 cm150 mm <br />0.15 m <br />) +
Amblystegium holzingeri +  and H. malacocladum +
Hygrohypnum closteri +
Hygrohypnum +
species +
incrassate +
small +  and large +
transitional +