×arctodupontia

Tzvelev
Treatment appears in FNA Volume 24. Treatment on page 604.
 TaxonIllustrator 
FNA24 P229A xArctodupontia pg 606.jpeg×arctodupontia sclerocladaCindy Roché

Plants perennial; rhizomatous. Culms to 38 cm. Sheaths closed for 1/3-3/4 their length; auricles absent; ligules membranous, acute to truncate, lacerate; blades flat or folded, glabrous. Inflorescences partly open panicles; branches stiff, glabrous, lower branches sometimes reflexed. Spikelets somewhat compressed, with 2-4 florets. Glumes subequal, ovate, membranous, acute; calluses with scant, stiff hairs; lemmas ovate, membranous to subcoriaceous, 1 (3) -veined, apices truncate and lacerate-dentate; paleas 2-keeled, glabrous; anthers indehiscent; ovaries glabrous; lodicules 2, membranous. Caryopses apparently absent.

Discussion

×Arctodupontia is a sterile hybrid between the two monotypic genera Dupontia and Arctophila. It is intermediate between the two parents.

"decumbent" is not a number.

... more about "×arctodupontia"
membranous +  and scarious +
indehiscent +
lacerate-dentate +  and truncate +
Stephen J. Darbyshire +  and Jacques Cayouette +
Tzvelev +
1 (?) +  and 3 (?) +
straight +
basal +  and terminal +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
not evident +
folded +  and flat +
spikelike +
hairy +  and glabrous +
not branching +
ascending +  and erect +
0 cm0 mm <br />0 m <br /> (38 cm380 mm <br />0.38 m <br />) +
not woody +
1/4 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
2 +  and 4 +
sterile +  and bisexual +
compressed +
reduced +
shorter or longer +
subtending +
acute +  and ovate +
subequal +
membranous +
uncinate +
membranous +  and subcoriaceous +
lacerate +, acute +  and truncate +
membranous +
inconspicuous +
lanceolate +
concealed +  and prominent +
2 +  and 1 +
well-developed +
2-keeled +
spikelike +
dry +  and fleshy +
brysting2003a +
1 +  and 60 +
compressed +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1 +  and 3 +
simple +  and compound +
2 (?) +  and 3 (?) +
Gramineae +
×arctodupontia +
Poaceae tribe Poeae +
membranous +
parallel +  and converging +
aquatic +  and terrestrial +