Pogonatum brachyphyllum

(Michaux) P. Beauvois

Prodr. Aethéogam., 84. 1805,.

Basionym: Polytrichum brachyphyllum Michaux Fl. Bor.-Amer. 2: 295. 1803
Treatment appears in FNA Volume 27. Treatment on page 157. Mentioned on page 155, 156, 158.

Plants small, scattered on a deep-green, persistent protonema, dull green to redbrown with age. Stems 0.2–0.3 cm. Leaves 1.5–3 mm, incurved at the tips when dry, erect-spreading when moist, gradually tapering to the blade; sheath oblong, entire, not hyaline-margined, the zone of incrassate hinge-cells at the shoulders not sharply defined; blade lanceolate, broadly and bluntly pointed, appearing turgid and fleshy, entire; marginal lamina erect, narrow, 1-stratose; costa ending in the tip, smooth abaxially; lamellae 25–40, entire in profile, 7–12 cells high, the marginal cells in section rounded, often thicker-walled, smooth; sheath cells short-rectangular; cells on the abaxial surface of blade 14–17 µm wide, thick-walled, longitudinally elongate in the median portion, subquadrate to either side. Seta (0.5–) 1.5–2.5 cm, reddish, often twisted below the capsule. Capsule 2–2.5 mm, ± asymmetric, suberect to inclined to almost horizontal; operculum with a convex base and a short, rather blunt beak; exothecium mammillose, the cells short-rectangular, thick-walled; peristome to 300 µm, deeply divided almost to the capsule rim, the teeth reddish with hyaline margins. Spores 13–18 µm.


Habitat: Bare sandy or clayey soil on banks of ditches or streams, usually in open situations
Elevation: low to moderate elevations

Distribution

V27 195-distribution-map.gif

Ala., Ark., Fla., Ga., Ill., Ind., Kans., La., Md., Miss., Mo., N.J., N.Y., N.C., S.C., Tenn., Tex., Va.

Discussion

Pogonatum brachyphyllum is endemic to eastern North America, and it has a more southerly distribution than P. pensilvanicum. The leaves of P. brachyphyllum are entire, short and broad, and appear succulent because of tall, closely packed lamellae. The calyptra is yellowish to reddish brown, contrasting with the rich, green protonemal mat.

Selected References

None.

Lower Taxa

None.

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

... more about "Pogonatum brachyphyllum"
prominent +
Gary L. Smith Merrill +
(Michaux) P. Beauvois +
Polytrichum brachyphyllum +
turgid +, pointed +  and lanceolate +
broadened +
differentiated +
thick-walled +
monoicous +, dioicous +, sexual +  and vegetative +
sparsely ciliate;smooth +
cucullate +
regular to somewhat +  and regular +
horizontal;suberect;inclined +
terete +, ovoid +  and short-cylindric +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
toothed +
undifferentiated +
Ala. +, Ark. +, Fla. +, Ga. +, Ill. +, Ind. +, Kans. +, La. +, Md. +, Miss. +, Mo. +, N.J. +, N.Y. +, N.C. +, S.C. +, Tenn. +, Tex. +  and Va. +
low to moderate elevations +
with a single papillate projection +  and mamillate +
Bare sandy or clayey soil on banks of ditches or streams, usually in open situations +
incrassate +
delimited +  and indistinct +
not differentiated +
photosynthetic +
7 +  and 12 +
serrate +, crenulate +  and serrulate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
membranous +
1(-3)-stratose +
cuticular-papillose +  and smooth +
entire +, toothed +  and serrate +
shape +  and size +
dioicous +  and sexual +
differentiated +  and not differentiated +
persistent +
reddish pigmented +
Prodr. Aethéogam., +
underground +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
not hyaline-margined +
short-rectangular +
differentiated +
larger +  and minute +
branched +  and simple +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Pogonatum brachyphyllum +
Pogonatum +
species +
erect-spreading +
tapering +
unjointed +
obliterated +
green +  and redbrown +
female +  and male +