Ptychomitrium drummondii

(Wilson) Sullivant in A. Gray

in A. Gray, Manual ed. 2, 636. 1856,.

Basionyms: Grimmia drummondii Wilson J. Bot. (Hooker) 3: 90. 3. 1841
Treatment appears in FNA Volume 27. Treatment on page 309. Mentioned on page 307, 310.

Plants small, cespitose, dull, yellowish to dark green. Stems erect, to 0.5 cm. Leaves erect-appressed and straight or slightly flexuous when dry, broadly acuminate, 1.5–2 mm; margins mostly obscurely serrate distally, erect proximally; apex subcucullate. Specialized asexual reproduction absent. Seta 1 per perichaetium, 2–3 mm. Capsule ovoid, 0.75–1 mm, smooth to obscurely striate-ribbed when dry; peristome teeth undivided, papillose. Calyptra lobes one third to one half length of calyptra.


Phenology: Capsules mature Sep–May.
Habitat: Tree bark, rarely rock and soil, humid sites
Elevation: low to moderate elevations (0-300 m)

Distribution

V27 424-distribution-map.gif

Ala., Ark., Del., Fla., Ga., Ill., La., Miss., Mo., N.C., Okla., S.C., Tenn., Tex., Va., W.Va.

Discussion

The leaves of Ptychomitrium drummondii are erect-appressed and straight or only a little curved when dry and, together with the bark substrate, make this dull dark green little moss easy to recognize. Sporophytes are very frequent and abundant. In urban areas in the southeastern United States, P. drummondii is often frequent and abundant on trees in parks and campuses and along city streets.

Selected References

None.

Lower Taxa

None.

"broad" is not a number.

... more about "Ptychomitrium drummondii"
specialized +
William D. Reese† +
(Wilson) Sullivant in A. Gray +
Grimmia drummondii +
plicate +, smooth +  and naked +
lobed +  and mitrate +
smooth;obscurely striate-ribbed +
ribbed +  and symmetric +
smooth;wrinkled +
0.075 cm0.75 mm <br />7.5e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Ala. +, Ark. +, Del. +, Fla. +, Ga. +, Ill. +, La. +, Miss. +, Mo. +, N.C. +, Okla. +, S.C. +, Tenn. +, Tex. +, Va. +  and W.Va. +
low to moderate elevations (0-300 m) +
branched +, 1-seriate +  and axillary +
Tree bark, rarely rock and soil, humid sites +
flexuous +  and straight +
acuminate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
2-stratose +  and 1-stratose +
papillose +  and smooth +
autoicous +  and sexual +
Capsules mature Sep–May. +
in A. Gray, Manual ed. +
reddish-brown +
inconspicuous +
straight +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
spheric +
0 cm0 mm <br />0 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Ptychomitrium drummondii +
Ptychomitrium +
species +
papillose +  and smooth +
divided +
slender +
yellowish +  and dark green +
plant +  and cespitose +