Taeniatherum

Nevski
Treatment appears in FNA Volume 24. Treatment on page 257.
 TaxonIllustrator 
FNA24 P102 Taeniatherum pg 258.jpegTaeniatherum caput-medusaeLinda Ann Vorobik
Hana Pazdírková

Plants annual. Culms (5) 10-55 (70) cm, erect, glabrous; nodes 3-6. Leaves evenly distributed; sheaths open, usually glabrous; auricles 0.1-0.5 mm, rarely absent; ligules membranous, truncate; blades flat to involute. Inflorescences spikes, erect; nodes 4-24 (28), each with 2 (3, 4) spikelets; internodes 0.5-3.5 mm. Spikelets with 2 (3) florets, the lowest floret in each spikelet bisexual, the distal floret (s) highly reduced, sterile; disarticulation above the glumes. Glumes 5-80 mm, equal, awnlike, erect to spreading or reflexed, bases connate. Bisexual florets: lemmas 5-veined, glabrous or scabrous, margins flat, scabrous, apices terminally awned, awns 20-110 mm, longer than the lemmas, divergent, often cernuous; paleas as long as the lemmas, keels antrorsely ciliate, apices truncate; lodicules 2, lobed, ciliate. Reduced florets: lemmas 3-veined, awned; paleas absent; anthers 3, yellow to purple. Caryopses narrowly elliptic, with an adaxial groove, apices pubescent, x = 7. Haplome Ta.

Distribution

Wash., N.Y., Conn., Utah, Calif., Oreg., Mont., Pa., Idaho, Nev.

Discussion

Taeniatherum includes only one species. It is native to Eurasia.

"decumbent" is not a number.

... more about "Taeniatherum"
membranous +  and scarious +
yellow +  and purple +
truncate +  and awned +
toothed +, lobed +  and entire +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
J.K. Wipff +
Nevski +
1 (?) +  and 3 (?) +
basal +  and apical +
2 cm20 mm <br />0.02 m <br /> (11 cm110 mm <br />0.11 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
connate +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
not evident +
flat +  and involute +
spikelike +
hairy +  and glabrous +
not branching +
10 cm100 mm <br />0.1 m <br /> (55 cm550 mm <br />0.55 m <br />) +
not woody +
Wash. +, N.Y. +, Conn. +, Utah +, Calif. +, Oreg. +, Mont. +, Pa. +, Idaho +  and Nev. +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
laterally compressed +  and terete +
reduced +
shorter than to longer than the adjacent florets +
erect +  and spreading or reflexed +
subtending +
awnlike +
unequal +
0.5 cm5 mm <br />0.005 m <br /> (8 cm80 mm <br />0.08 m <br />) +
uncinate +
solid +  and hollow +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
distributed +
3-veined +  and 5-veined +
scabrous +  and glabrous +
keeled +, lanceolate +  and rectangular +
stiffly membranous +  and coriaceous +
membranous +
inconspicuous +
fleshy +  and membranous +
concealed +  and prominent +
4 +  and 24 +
2 +  and 1 +
hairy +  and glabrous +
well-developed +
slightly longer +
subequal +
dry +  and fleshy +
spikelike +
frederiksen1986a +  and humphries1978a +
subsessile +  and sessile +
4 +, 3 +  and 2 +
terete +  and compressed +
1 +  and 3 +
simple +  and compound +
2 (?) +  and 3 (?) +
not papillate +
Gramineae +
Taeniatherum +
Poaceae tribe Triticeae +
membranous +
inconspicuous +
aquatic +  and terrestrial +