Pleuropogon californicus
Pleuropogon californicus var. davyi
annual semaphoregrass, California semaphoregrass, semaphore grass
annual semaphoregrass, Davy's semaphore grass
15-95 cm, erect or geniculate at the base, sometimes rooting at the lower nodes;
nodes 3-6.
glabrous;
ligules 2-6 mm;
blades 3-29 cm long, 3-8 mm wide, adaxial surfaces slightly scabridulous.
8-35 cm, with 6-13 spikelets;
internodes 1-6 cm;
pedicels 1-5.5(9) mm, ascending to spreading.
15-60 mm, ascending to spreading, with 7-20(30) florets, lower florets bisexual, upper florets pistillate, terminal florets sterile.
25-60 mm.
lanceolate to broadly ovate;
lower glumes 1-4.5 mm;
upper glumes 2-6.5 mm, 1-3-veined;
rachilla internodes 1-2.8 mm long, 0.2-0.5 mm thick, with a glandular swelling at the base;
lemmas 4.5-7.5 mm, 7(9)-veined, veins distinct, often prominent, apices truncate or emarginate, unawned or awned, awns to 11 mm;
paleal keels scabridulous, each with a 0.5-2.5 mm triangular, winglike appendage, often denticulate beyond the appendage;
anthers 2.5-4 mm.
2.5-3.1 mm.
unawned, sometimes mucronate, mucros to 1.5 mm;
paleal appendages 0.5-1 mm.
= 16.
Pleuropogon californicus
Pleuropogon californicus var. davyi
Pleropogon californicus var. davyi is the more restricted of the two varieties, being known only from vernal pools, sloughs, and marshy grasslands in Mendocino and Lake counties, California.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Plants annual or facultative perennials; lemmas usually with awns 5-11 mm long, rarely unawned; paleal appendages 0.5-2.5 mm long; spikelets 15-30 mm long | var. californicus |
1. Plants perennial; lemmas unawned, sometimes mucronate, mucros to 1.5 mm long; paleal appendages 0.5-1 mm long; spikelets 25-60 mm long | var. davyi |
CA
WildflowerSearch
iNaturalist
USDA Plants Database
