Dasypyrum

(Coss. & Durieu) T. Durand
Treatment appears in FNA Volume 24. Treatment on page 256.
Revision as of 01:57, 30 July 2020 by imported>Volume Importer
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 TaxonIllustrator 
FNA24 P101 Dasypyrum pg 257.jpegDasypyrum villosumCindy Roché

Plants annual or perennial; shortly rhizomatous if perennial. Culms 20-100 cm. Sheaths open; auricles present, often inconspicuous; ligules 0.3-1 mm, membranous, truncate; blades 1-5 mm wide, flat, linear, central vein distinct on the abaxial side. Inflorescences terminal spikes, 4-12 cm long including the awns, 0.6-2 cm wide excluding the awns, compressed, dense, with 1 spikelet per node; rachis internodes flat, margins ciliate, hairs white; middle internodes 1-3 mm; disarticulation in the rachises, at the nodes beneath each spikelet. Spikelets 25-75 mm including the awns, 7-22 mm excluding the awns, more than 3 times the length of the rachis internodes, usually divergent, sometimes ascending, laterally compressed, with 2-4 florets, the lower 2 florets usually bisexual, the terminal florets sterile; rachilla internodes below the lower florets shorter than those below the terminal florets. Glumes equal, to 40 mm including the awns, to 8 mm excluding the awns, coriaceous, usually 5-veined, strongly 2-keeled, keels with 1-3 mm hairs, margins unequal, stiff, translucent, apices tapering into scabrous awns; bisexual lemmas 9-13 mm excluding the awns, lanceolate, keeled, usually 5-veined, apices acuminate, awned, awns to 60 mm; sterile lemmas smaller, awns to 10 mm; paleas narrowly lanceolate, membranous, 2-veined, 2-keeled; lodicules 2, free, membranous, ciliate or glabrous; anthers 3, 4-7 mm, yellow; ovaries pubescent; styles 2, free to the base, x = 7. Haplome V.

Discussion

Dasypyrum is a Mediterranean genus of two species; only one has been collected in the Flora region. The hairy, 2-keeled glumes make the genus easily distinguishable from other genera in the Triticeae.

Lower Taxa

"decumbent" is not a number."+timesthelengthof" is not declared as a valid unit of measurement for this property.

... more about "Dasypyrum"
membranous +  and scarious +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
acuminate +  and tapering +
Signe Frederiksen +
(Coss. & Durieu) T. Durand +
1 (?) +  and 3 (?) +
basal +  and apical +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
not evident +
cross +, linear +  and narrowly lanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
spikelike +
hairy +  and glabrous +
not branching +
20 cm200 mm <br />0.2 m <br /> (100 cm1,000 mm <br />1 m <br />) +
not woody +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
2 +  and 4 +
laterally compressed +  and terete +
shorter than to longer than the adjacent florets +
subtending +
2-keeled +
unequal +
0 cm0 mm <br />0 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
coriaceous +
uncinate +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
4 cm40 mm <br />0.04 m <br /> (?) +  and 12 cm120 mm <br />0.12 m <br /> (?) +
0.6 cm6 mm <br />0.006 m <br /> (2 cm20 mm <br />0.02 m <br />) +
solid +  and hollow +
sterile +  and bisexual +
keeled +  and lanceolate +
smaller +
0.9 cm9 mm <br />0.009 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
stiffly membranous +  and coriaceous +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
membranous +
inconspicuous +
glabrous +  and ciliate +
lanceolate +
concealed +  and prominent +
2 +  and 1 +
well-developed +
slightly longer +
2-keeled +  and lanceolate +
subequal +
membranous +
dry +  and fleshy +
spikelike +
frederiksen1991b +
subsessile +  and sessile +
bisexual +  and sterile +
compressed +
0.7 cm7 mm <br />0.007 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
1 +  and 3 +
simple +  and compound +
2 (?) +  and 3 (?) +
not papillate +
Gramineae +
Dasypyrum +
Poaceae tribe Triticeae +
membranous +
inconspicuous +
perennial +  and annual +
aquatic +  and terrestrial +