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Porter's melicgrass

Porter melic, Porter's melic, Porter's melicgrass

Habit Plants not or loosely cespitose, shortly rhizomatous.
Culms

55-100 cm, not forming corms;

internodes smooth, basal internodes not thickened.

Sheaths

often scabrous on the keels, otherwise smooth;

ligules 1-7 mm;

blades 2-5 mm wide, both surfaces glabrous, scabridulous.

Panicles

narrow;

branches straight, appressed.

13-25 cm;

branches 1-9 cm, straight and appressed or flexible and ascending to strongly divergent, with 1-12 spikelets;

pedicels sharply bent below the spikelets;

disarticulation below the glumes.

Spikelets

8-16 mm long, 1.5-5 mm wide, parallel-sided when mature, with 2-5 bisexual florets;

rachilla internodes 1.9-2.1 mm.

Glumes

green or pale.

green, pale, or purplish-tinged;

lower glumes 3.5-6 mm long, 2-3 mm wide, 3-5-veined;

upper glumes 5-8 mm long, 2-3 mm wide, 5-veined;

lemmas 6-10 mm, glabrous, chartaceous on the distal 1/3, 5-11-veined, veins conspicuous, apices rounded to acute, unawned;

paleas about 2/3 the length of the lemmas;

anthers 1-2.5 mm;

rudiments 1.8-5 mm, acute to acuminate, resembling the bisexual florets.

2n

= 18.

Melica porteri var. porteri

Melica porteri

Distribution
from FNA
AZ; CO; KS; NM; TX; UT
[BONAP county map]
from FNA
AZ; CO; KS; NM; TX; UT
[WildflowerSearch map]
[BONAP county map]
Discussion

Melica porteri var. porteri grows from northern Colorado to Arizona and central Texas, and south to the Sierra Madre Occidental, Mexico.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Melica porteri grows on rocky slopes and in open woods, often near streams. It grows from Colorado and Arizona to central Texas and northern Mexico. Living plants are sometimes confused with Bouteloua curtipendula; the similarity is superficial.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Panicle branches flexible, ascending to strongly divergent; glumes purplish-tinged
var. laxa
1. Panicle branches straight, appressed; glumes green or pale
var. porteri
Source FNA vol. 24, p. 98. FNA vol. 24, p. 98.
Parent taxa Poaceae > subfam. Pooideae > tribe Meliceae > Melica > Melica porteri Poaceae > subfam. Pooideae > tribe Meliceae > Melica
Sibling taxa
M. porteri var. laxa
M. altissima, M. aristata, M. bulbosa, M. californica, M. ciliata, M. frutescens, M. fugax, M. geyeri, M. harfordii, M. imperfecta, M. montezumae, M. mutica, M. nitens, M. smithii, M. spectabilis, M. stricta, M. subulata, M. torreyana
Subordinate taxa
M. porteri var. laxa, M. porteri var. porteri
Name authority unknown Scribn.
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