Bommeria

E. Fournier in Baillon

in Baillon,Dict. Bot. 1: 448. 1877 [Named for the Belgian pteridologist. 1829.

Treatment appears in FNA Volume 2.

Plants terrestrial. Stems prostrate, long-creeping, often branched [short, seldom branched]; scales pale-brown to yellowish, lanceolate, concolored, margins entire. Leaves monomorphic, scattered, 4–30 cm. Petiole chestnut-brown to dark purple, rounded or with single groove adaxially, indument of scales and/or trichomes, especially proximally and distally, with single vascular-bundle. Blade pentagonal, pedately divided into 3 segments, deeply pinnate-pinnatifid, herbaceous, abaxially with scales, unicellular coiled trichomes, and unicellular needlelike trichomes, adaxially dull, not striate, with unicellular needlelike trichomes; rachis straight. Segments of blade sessile, 1–3 (–5) mm wide, distal segment 1–2-pinnatifid in proximal portion, pinnatifid in distal portion; proximal segments usually connected to distal by narrow wing along rachis, inequilaterally elongate-deltate, proximal basiscopic portion elongate, 1–2-pinnatifid; margins not recurved to form false indusia. Veins in segments obscure, free to anastomosing, pinnately branched and divergent distally. False indusia absent. Sporangia borne along veins, covering most veins or somewhat marginally restricted, containing 64 [32] spores, paraphyses and glands absent. Spores brown, globose, trilete, exospore smooth, perispore surfaces crested or reticulate, equatorial flange absent. x = 30.

Distribution

North America, Mexico, Central America

Discussion

Species 5 (1 in the flora).

Lower Taxa

... more about "Bommeria"
Christopher H. Haufler +
E. Fournier in Baillon +
coiled +  and unicellular +
pinnate-pinnatifid +, divided +  and pentagonal +
elongate-deltate +, pinnatifid +  and 1-2-pinnatifid +
North America +, Mexico +  and Central America +
yellow +  and white +
obcordate;reniform +
monomorphic +
recurved +  and reflexed +
noncircinate +  and circinate +
4 cm40 mm <br />0.04 m <br /> (30 cm300 mm <br />0.3 m <br />) +
not recurved +
chestnut-brown;dark purple +
with single groove +  and rounded +
in Baillon,Dict. Bot. +
gastony1976a +  and haufler1979a +
concolored;pale-brown;yellowish +
persistent +
lanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
1 +, 32 +  and 64 +
globose +
long-creeping +  and prostrate +
Bommeria +
Pteridaceae +
crescent--shaped +  and roundish +
branched +  and anastomosing +