Leptopterigynandrum

Müller Hal.

Hedwigia 36: 114. 1897.

Etymology: Greek, leptos, slender, and genus Pterigynandrum y
Treatment appears in FNA Volume 28. Treatment on page 346. Mentioned on page 341, 342, 646.
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 TaxonIllustrator 
LeskLeptopterigynandrumAustroalpinum.jpegLeptopterigynandrum austroalpinumPatricia M. Eckel

Plants small, in slender, flat mats, light green or brown. Stems irregularly branched; paraphyllia absent; rhizoids often on adaxial costa at base. Stem and branch leaves similar. Stem-leaves strongly appressed, imbricate when dry, erect-spreading when moist, ovate, not plicate; margins plane, entire or somewhat serrulate toward apex; apex abruptly acuminate, hairpoint absent; costa variable, 2-fid from base or just beyond short base, weak but distinct, 1/3–1/2 leaf length, straight, not obscure distally; alar cells quadrate to oblate-rectangular; proximal laminal cells 1–2: 1, walls not or obscurely pitted; medial cells short-rhomboidal, papillae many, exceedingly fine, walls firm. Specialized asexual reproduction absent. Sexual condition probably autoicous; perichaetial leaves green, erect, margins often serrulate at apex, apex subulate. Sporophytes unknown.

Distribution

w North America, e Mexico, South America, Eurasia, s Africa

Discussion

Species 7 (1 in the flora).

Selected References

None.

"straight" is not a number."broad" is not a number.

... more about "Leptopterigynandrum"
subulate +  and acuminate +
William A. Weber +
Müller Hal. +
adherent +  and free +
monopodial +  and branching +
spreading;erect +
flagelliform +
cucullate +
asymmetric-curved +
erect;horizontal +
long-exserted +
oblong;pyriform +
quadrate;oblate-rectangular +
rudimentary +
excurrent +  and percurrent +
specialized +
distinct +
1/3 +  and 1/2 +
autoicous +, dioicous +  and sexual +
w North America +, e Mexico +, South America +, Eurasia +  and s Africa +
Greek, leptos, slender, and genus Pterigynandrum y +
linear-lanceolate +  and lanceolate +
serrulate;serrulate;entire +
slender +
long-rostrate +  and conic +
branched +  and unbranched +
stoloniferous +
peglike +  and linear +
keeled;linear +
curved +  and straight +
elongate +
asymmetric +  and symmetric +
erect-spreading +
slender +
differentiated +
Leptopterigynandrum +
Leskeaceae +
specialized +
autoicous +, sexual +  and asexual +
thick +  and thin +
brown +  and light green +