12. SOUTHERN CALIFORNIA ACADEMY OF SCIENCES 
ovate-oblong, 3 mm. long, the mid-vein excurrent from the ob- 
tuse, cillolate apex as a short rough awn; achenes lead-colored, 
shining, obovoid, mucronate, 2 mm. long, equalled by the 
bristles. 
In brackish marshes of the coastal subregion; less abundant 
than the preceding species, and, like it, known as Tule. Los 
Angeles; Nevin. Océanside, Compton; Parish. North to Sae- 
ramento, east to Florida, south to Mexico, Central and South 
America. 
6. HEMICARPHA, Nees & Arn. Edin. New Patil. Fourn. 
17-203. 
Low annual herbs, with filiform culms and narrow leaves. 
Spikelets 1-3, terminal, subtended by a 1-3 leaved involucre. 
‘Seales spirally imbricated, deciduous, all subtending perfect 
flowers. Perianth a minute hyaline seale at the base of the 
flower and next to the rachis. Stamens 1-3, style 2-cleft, de- 
ciduous; achenes turgid or lenticular. 
A genus of but three species, natives of temperate and 
tropical regions; two of them North American. 
1. Hemicarpha occidentalis, Gray, Proc. Am. Acad. 7:391. 
Culms 5-25mm. tall, flattened; leaves conduplicate, exceed- 
ing the culms, those of the involucre similar, 1-2 of them sur- 
passing the infloresence; spikelets 1-2, squarrose, ovoid to glo- 
bose, 2-4mm. high; scales 1-2mm. long, scarious, ovate, obliquely 
truneate, the thickened midvein prolonged into a stout, long 
tip; floral scales obovate, truneate or erose, 2-4 nerved, less 
than half as long as the achene, deciduous, or rudimentary; » 
achenes 0.5mm. long, oblong-obovoid, mucronulate, minutely 
roughened. 
Growing in small tufts, in wet sand, at Bluff Lake, 7,400 ft. 
alt., in the San Bernardino Mts., June 20, 1894, 3268 Parish. 
This is the southern known limit of the species, which extends © 
in the Sierra Nevada northward to Washington. The type was 
collected by Bolander in the Yosemite. 
ths (GLEZEUDULM, JZ, SBP, IES (Ts IBA, 
Perennial herbs with stout rootstocks. Culms, stout, erect, 
3-angled or terete, leafy with elongated channeled leaves. 
Spikelets small, few-flowered, variously clustered. Scales about 
5, closely imbricated, the lower empty, the middle subtending 
imperfect flowers, the upper fertile. Stamens 2-3. Style 2-3 
cleft, deciduous from the apex of the achene. Achene ovoid 
or globose, without a tubercle. 
A genus of 25 or more species, of tropical or temperate coun- 
tries; only the following widely distributed species occurring 
in our region. 
