Brachymenium mexicanum

Montagne

Ann. Sci. Nat., Bot., sér. 2, 9: 54. 1838.

Treatment appears in FNA Volume 28. Treatment on page 124. Mentioned on page 122, 123.

Plants in open to dense turfs, green, yellow-green, or golden, often lustrous. Stems 0.5–1 (–2) cm, gemmiform to somewhat rosulate. Leaves strongly imbricate, slightly twisted when dry, concave, 1–2 (–3) mm; margins plane to weakly recurved proximally, entire to serrulate distally, limbidium absent; apex acute; costa short to long-excurrent, awn present; proximal laminal cells abruptly quadrate to short-rectangular; medial and distal cells rhomboidal to elongate-hexagonal, 40–60 × 10–16 µm, 3–4: 1. Specialized asexual reproduction absent. Sporophytes unknown.


Habitat: Dry rock outcrops, soil covered crevices
Elevation: moderate elevations (1000 m)

Distribution

V28 190-distribution-map.gif

Ariz., Mexico, Central America

Discussion

Brachymenium mexicanum is distinguished from B. macrocarpum by its more or less imbricate leaves, lack of limbidium, and absence of rhizoidal tubers. The leaf bases are not decurrent.

Selected References

None.

Lower Taxa

None.

"narrower" is not a number."narrow" is not a number.

... more about "Brachymenium mexicanum"
John R. Spence +
Montagne +
pigmented +
denticulate +
reduced +
curved +  and straight +
decurrent +
cucullate +
erect +  and suberect +
long-exserted +
elongate-ovate +  and subcylindric +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
quadrate +  and long-rectangular +
appendiculate +
rudimentary +
long-excurrent +
subpercurrent +
hexagonal;rhomboidal +
Ariz. +, Mexico +  and Central America +
moderate elevations (1000 m) +
hyaline;pale-yellow +
pale-brown +  and redbrown +
Dry rock outcrops, soil covered crevices +
polyoicous +, monoicous +, dioicous +  and sexual +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
concave +
vegetative +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
entire +  and serrulate +
1 (?) +, 3 (?) +  and 4 (?) +
rhomboidal +  and elongate-hexagonal +
short-rectangular +  and quadrate +
long-conic +
lateral +  and terminal +
lateral +  and terminal +
diplolepidous-alternate +
abruptly quadrate +  and short-rectangular +
Ann. Sci. Nat., Bot., sér. +
differentiated +
smooth;papillose +
not perforate +
straight +
elongate +
pale tan +  and brown +
germinating +
erect-spreading +
gemmiform +
smaller +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Brachymenium mexicanum +
Brachymenium +
species +
linear-lanceolate +
distinct +
thickness +
straight +
specialized +
dioicous +  and sexual +
sinuate +
thin to somewhat +
golden +, yellow-green +  and green +