60 CYPERACEAE. 



2. C. bromoides (Clarke) Britton. Annual with slender stems 

 4-8 dm. high, exceeding the leaves; spikelets 4-12, lanceolate, 

 flattened, 10-20-flowered; involucral leaves 2-4; scales acute, 4 mm. 

 long, yellowish brown, green on the 3-nerved keel, scarious-margined; 

 stamens 3; styles 2-cleft; achenes ovoid, black, 1-1.5 mm. long, 

 lenticular. 



Cienega, near Los Angeles according to Parish. 



3. C. laevigatus L. Perennial, with slender creeping rhizomes; 

 stems tufted, slender, 8-15 cm. high, terete, with 2-3 short brown 

 sheaths at the base, the upper bearing a short, erect, subtriangular 

 leaf, otherwise naked; involucre of usually 2 leaf-like bracts, 1 a 

 continuation of the stem, erect, the other spreading, 3 cm. long or 

 less; umbel sessile, capitate, apparently lateral; spikelets sessile, 

 many-flowered, 4-6 mm. long, pale green; scales broad, obtuse, 

 about 2 mm. long; rachis deeply pitted transversely; stamens 3; 

 style 2-cleft; achene broadly obovate, 12 mm. long. 



Occasional in moist places about Los Angeles and San Bernardino. 



4. C. inflexus Muhl. Stems very slender, tufted, 3-15 cm. high; 

 leaves 2 mm. wide or less, nearly equaling the stems, those of the 

 involucre 2-3, exceeding the umbel; umbel sessile, usually capitate; 

 spikelets linear-oblong, 4-6 mm. long, 6-10-fiowered; scales pale 

 brown, lanceolate, firm, tapering into a long recurved awn; stamen 1 ; 

 style 3-cleft; rachis narrowly winged, the wings persistent; achene 

 3-angled, narrowly obovoid or oblong, obtuse, mucronulate. (C. 

 aristatus Boeckl.) 



In moist sandy soil. Laguna, San Joaquin Hills, Orange County; 

 Bear Valley, San Bernardino Mountains. 



5. C. esculentus L. Perennial by scaly horizontal tuber-bearing 

 rootstocks; stems rather stout, 3-6 dm. high; leaves light green, 

 4-8 mm. wide, usually longer than the stem, with prominent mid- 

 vein, those of the involucre 3-6, the longer much exceeding the 

 umbel; umbel 4-10-rayed, usually compound; spikelets numerous 

 in loose spikes, straw-colored or yellowish brown, spreading, 12-24 

 mm. long, 3 mm. wide, many-flowered; scales ovate-oblong, sub- 

 acute, 3-5-nerved; rachis narrowly winged; stamens 3; style 3-cIeft; 

 achene obovoid, obtuse, 3-angled. 



Frequent in river bottoms about Los Angeles, Santa Ana and 

 San Bernardino. 



6. C. parishii Britton. Annual with fibrous roots; culms tufted, 

 slender, 1-2.5 dm. high; leaves 2-5 mm. wide, shorter than the culm, 

 those of the involucre 2-7, the longer ones exceeding the inflorescence; 

 umbel simple or somewhat compound, usually several-rayed, the 

 rays 5-50 mm. long, slender; spikelets densely short-spicate, linear, 

 acute, 12-20 mm. long, about 2 mm. wide; rachis at length wing- 

 less, the narrow wings early deciduous; scales oblong-lanceolate, 

 purple green, obtuse, about 2 mm. long; achenes narrowly ovoid- 

 oblong, nearly black, about half as long as the scale. 



Growing in wet sand, on the banks of streams, in the vicinity of 

 San Bernardino. 



7. C. speciosus Vahl. Annual with stems 1-5 dm. high; leaves 

 shorter than the stems, 4-6 mm. wide, scabrous margined; involucral 



