Agrostis viridis Gouan
Poaceae (Grass Family)
Perennial with long creeping and rooting stolons; culms decumbent at the base;
short horizontal leaf blades, somewhat scabrous, 2-10 cm. long, ligules
truncate, dentate and sometimes scaberulous, 2-6 mm. long; panicle contracted,
lobed, verticillate, light green or purplish, 3-15 cm. long, the branches
ascending; spikelets usually falling entire; glumes scabrous on back and keel;
lemma 1 mm. long and awnless, palea nearly as long; the grain is amber colored,
pointed toward the apex, rounded at the base and with a distinct groove along
Moist ground, along irrigation ditches and near the coast, Mendocino Co.
S. to S. Calif., Santa Catalina Id.; May-June
Greek, polus, many, and pogon,
beard , because of the bristly infl. (Munz, Flora
So. Calif. 995). Agrostis is Greek for a kind of grass. (Jaeger 11). New
Latin, verticillatus, whorled.
(Jaeger 280). Latin, viridis,
green. (Jaeger 281).
Common in the study area. Photographed
at North Star Beach and along Back Bay Dr. at the north end of Eastbluff.
(my comments). Agrostis
is traditionally defined as including plants with awnless glumes and spikelets,
which disarticulate above the glumes. In
Agrostis semiverticillata, however,
the articulation is below the glumes, and the spikelets therefore fall entire.
(Mason 131). It
appears that for the reasons described by Mason, Munz reclassified this species
from A. semiverticillata to Polypogon
semiverticillatus as it is in the genus Polypogon
that the spikelets fall entire. A.
semiverticillata is no longer listed in the Agrostis
key of A Flora of Southern California,
however, it is listed after A. scabra
on P. 943 as an unnumbered species. (my
1993 Jepson Manual lists the new name, A.
viridis. (Hickman, Ed. 1230).
Agrostis species have been
known to cause hay fever and asthma. (Fuller
383). About 10 species of temperate regions. (Munz, Flora So. Calif.
Robbins et al. 52;Hickman, Ed. 1230; Mason 131; Munz, Calif Flora 1520; Munz,
Flora So. Calif. 996; Robbins
et al. 52; Roberts 45.
May 5 83 #23; May 3 84 #16.
Identity: by R. De Ruff, confirmed by F. Roberts.
Computer Ref: Plant Data 37.
Have plant specimen.
Last edit 4/8/03.