132. SOUTHERN CALIFORNIA ACADEMY OF SCIENCES 
** Spikelets several or many, terminal subtended by one or more 
involucral leaves; bristles 1 6; anthers tipped with an appendage, 
which rs hispidulous, except in No. 7; styles 2 clet; achenes plano- 
convex; perennials with stout, scaly horizontal rootstocks. 
“Culms 3-angled,; sheaths nodulose; bristles retrorsely barbed. 
++/nvolucral leaf stiff and erect, apparently continuous with the 
culm, scales obtuse or emarginate, the stout midvein terminating 
in @ short mucro, sprkelets in a sesstle cluster, 
4. Scirpus Ameyicanus, Pers. Syn. 1:68. Britton, Trans. N. 
Y. Acad. 11:78. Britt. & Br. Ill. Fl. 1:265. 8S. pungens, Vahl, 
Enum. 2:255. Watson, Bot. Cal. 2:218. C. triangularis, Mac- _ 
Mill. Met. Minn. Vol. 99. 
Culms 1-5 dm. tall; leaves 2-6, at length divergent, rigid, 
channeled, 1-3 dm. long, 1-3 mm. wide; involueral leaf, 2-20 
em. long, channeled; spikelets 1-4, ovoid to ovoid-oblong, 
acute, 5-10 mm. long; seales dark brown, ovate-oblong, 3-4 
mm. long; stamens 3, appendages conical; achenes brown. 
obovoid, 1 mm. long, mucronate, equaled by the bristles. 
Apparently confined in the Cismontane region to the coastal 
subregion. Los Angeles River; Davidson. San Diego; Chan- 
dler. Wet sand banks, San Pasqual; 1565 Parish. Also re- 
ported in the Botany of the Death Valley Expedition as 
abundant in marshes of the deserts of Inyo County. Through- 
out North America, and in Chile. 
5. Scirpus Olneyi, Gray, Bost. Jour. Nat. Hist. 5:238. 
Culms more or less deeply triquetrous, 3-20 dm. tall, 2-3 em. 
wide; 1-2 of the sheaths usually bearing a thin, broad leaf, 2-5 
em. long, or leafless; involueral leaf, 3-angled, 1-2 em. long; 
spikelets 2-20, oblong-ovoid acute, about 1 em. long; scales 
brown, broadly ovate; stamens 2-3; achenes brown, obovate, 
mucronate, 2 mm. long, equaled by the bristles. 
Very common in marshes of the Cismontane region; oc- 
curring also in the Desert region. Los Angeles; Davidson, 
Nevin. Temecula; Nevin, Parish. San Bernardino; Parish 
Salt Creek and Palmetto Springs, Colorado Desert; Alderson, 
North to Oregon; on the Atlantic Coast from Florida to 
Rhode Island. 
¥ 6. Scirpus Pacificus, n. sp., Britton, in ht. S. maritimus, 
Wats., Bot. Cal. 2:218. 8S. robustus, Jepson, Fl. W. Mid. Cal. 87. 
Abrams, Fi. Los Angeles’’, 69. 
Culms seabrid above, 3-6 dm. tall; leaves rough-margined, | 
3-10 mm. wide, the longest equaling the culms; involucral leaves 
2-5, one of them erect, and 10-15 em. long; spikelets ovoid, 
obtuse, 10-15 mm. long, 3-6 mm. thick; scales brown, puberu- 
leus, ovate, 5-7 mm. long, the mid-vein excurrent from the 
toothed apex as a short, recurved awn; bristles 1-5, weak, 
