224 
246. Cortaderia Stapf—Pampas-grass. 
A TEXT-BOOK OF GRASSES 
RR. Lemmas bifid 
at apex, often ~ 
awned from 
between the 
teeth; spikelets 
large, some- 
times com- 
pressed and (Par. 258). 
keeled........BRomuUS 
The orna- 
mental species, C. argentea (Nees) Stapf (Fig. 50), is a 
large reed growing in clumps, the blades numerous, long 
and narrow, drooping, the flower-stalk tall and slender, 
bearing a large silvery white or rosy plume 1 to 2 feet 
long. A native of Argentina, cultivated for ornament 
and, in California, on a commercial scale for the plumes. 
Another species, C. jubata (Lem.) Stapf, with smaller and more 
lax lavender-colored plume, is occasionally cultivated. A related 
plant, the uva-grass Gynerium sagittatum (Aubl.) Beauv. (G. sac- 
Fia. 50. 
tea. 
greatly 
pistillate spikelet (a), 
of pistillate spikelet (b), glumes 
Cortaderia argen- 
A group of inflorescences 
reduced; glumes of 
florets 
(c), and florets (d) of staminate 
spikelet, X1. (U.S. Dept. Agr., 
Div. Agrost., Bull. 20.) 
charoides Humb. & Bonpl.), sometimes 
cultivated, is a tall coarse leafy reed, 
12 to 30 feet high, with creeping root- 
stocks, the lower leaves soon dropping, 
leaving the stem naked below. Tropi- 
cal America; not hardy. 
247. Arundo L.—Giant-reed. 
The species found in the United 
States, A. Donax L., is a tall 
stout reed, 5 to 10 feet high, with 
somewhat woody finally much- 
branched stem, broad clasping 
blades and large plumes or pani- 
cles. A native of the Mediter- 
ranean region, cultivated in the 
southern states for ornament. It 
has escaped along irrigation 
