Melica geyeri

Munro Munro
Common names: Geyer's oniongrass
Endemic
Treatment appears in FNA Volume 24. Treatment on page 93.

Plants cespitose, rhizomatous. Culms 65-200 cm, glabrous, forming corms, corms sessile on the rhizomes; internodes smooth. Sheaths scabridulous to scabrous, sometimes sparsely pilose, particularly at the throat and collar; ligules 0.8-5 mm; blades 2-8 mm wide, abaxial surfaces scabridulous, adaxial surfaces with hairs. Panicles 10-30 cm; branches 3-11 cm, divergent to reflexed, flexuous, with 1-6 spikelets; pedicels straight; disarticulation above the glumes. Spikelets 8-24 mm, with 4-7 bisexual florets, base of the distal florets exposed at anthesis; rachilla internodes 2-3 mm, not swollen when fresh, not wrinkled when dry. Glumes usually less than 1/2 the length of the spikelets; lower glumes 3.5-7 mm long, 1.5-2 mm wide, 5-9-veined; upper glumes 5-11 mm long, 2-2.5 mm wide, 5-11-veined; lemmas 7.5-12.5 mm, glabrous or scabrous, 7-veined, veins inconspicuous, apices rounded to acute, sometimes toothed, unawned or awned, awns to 2 mm; paleas about as long as the lemmas; anthers 3, 2.5-4 mm; rudiments 3-7 mm, tapering, resembling the bisexual florets. Caryopses 3-4 mm. 2n =18.

Distribution

Calif., Oreg., B.C., Mont., Nev.

Discussion

Melica geyeri grows to 2000 m, primarily in dry, open woods, in Oregon and California. Its large size and open panicle distinguish M. geyeri from most other North American species of Melica.

Selected References

None.

Key

1 Lemma apices awned, awns 0.5-2 mm long Melica geyeri var. aristulata
1 Lemma apices unawned Melica geyeri var. geyeri

"decumbent" is not a number.

... more about "Melica geyeri"
membranous +  and scarious +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
toothed +, rounded +  and acute +
Mary E. Barkworth +
Munro Munro +
1 (?) +  and 3 (?) +
straight +
basal +  and apical +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
persistent +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
hairy +  and glabrous +
folded +  and flat +
0.2 cm2 mm <br />0.002 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
3 cm30 mm <br />0.03 m <br /> (11 cm110 mm <br />0.11 m <br />) +
Geyer's oniongrass +
not branching +
ascending +  and erect +
65 cm650 mm <br />0.65 m <br /> (200 cm2,000 mm <br />2 m <br />) +
not woody +
Calif. +, Oreg. +, B.C. +, Mont. +  and Nev. +
0 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
sometimes longer +
4 +  and 7 +
compressed +
reduced +
shorter than to longer than the adjacent lemmas +
subtending +
0 +  and 1/2 +
chartaceous +  and membranous +
uncinate +
scabrous +  and glabrous +
0.75 cm7.5 mm <br />0.0075 m <br /> (1.25 cm12.5 mm <br />0.0125 m <br />) +
coriaceous +  and membranous +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
inconspicuous +
lanceolate +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
1.5mm +  and 2mm +
concealed +  and prominent +
2 +  and 1 +
well-developed +
reduced +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
scabrous +  and strigose +
dry +  and fleshy +
scabridulous to scabrous +
not viviparous +
compressed +
0.8 cm8 mm <br />0.008 m <br /> (2.4 cm24 mm <br />0.024 m <br />) +
1 +  and 3 +
simple +  and compound +
collar-like +
2 (?) +  and 3 (?) +
Gramineae +
Melica geyeri +
species +
membranous +
0.5 cm5 mm <br />0.005 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
2mm +  and 2.5mm +
inconspicuous +
plant +  and cespitose +
aquatic +  and terrestrial +