so SOUTHERN CALIFORNIA ACADEMY OF SCIENCE^. 



bromoides, C. B. Clarke, Jour. Linn. Soc. 21 :60. Britton. Bull. 

 Torr. Club. 13 :206. 



Culms slender, 4-8dm. tall, exceeding the few rough-mar- 

 gined leaves; spikelets 4-12, lanceolate, flattened, 10-20-flower- 

 ed, 8-18mm. long; involucral leaves 2-4, the longest 1-1. 5dm. 

 long; scales acute, yellow-bro^vn, the green keel 3-nerved, and 

 the margins scarious, about 4mm. long : stamens 3 : achenes 

 ovoid, black, about one-third as long as the scale. 



Cienega, Los Angeles Co., 1884; Oliver. Near Los Angeles, 

 Aug. 24, 1888, Dr. Hasse. The first of these specimens is in the 

 Grav Herbarium of Harvard University; the second is in the 

 Herbarium of the New York Botanical Garden. The plant is 

 widely spread through ^Mexico and Central America, but in 

 the United States is known only from the above collections. 

 ^LATE II. Drawn from Dr. Hasse's specimen. 



-«-f Scales concave, only slightly carinate ; achenes biconvex ; inflor- 

 escence a sessile and apparently lateral cluster of few spikelets. 

 1/ 3. Cyperus laevigatus, Linn. ]\rant. 2 :179. 



Perennial from a wiry rootstock : culms few from each 

 node, subterete, about 1dm. tall, hardly surpassing the erect 

 filiform leaves ; spikelets 1-3, ovate, 3-8mm. long, 6-18-flowered ; 

 involucral leaves 2, one erect and apparently continuous with 

 the culm, the other very short ; scales broadly ovate, obtuse, 

 nearly nerveless, 2mm. long, pale and more or less tinged with 

 rich broAvn ; stamens 3 ; achenes ovoid, 1.25mm. long, brown 

 and shining, rachis broad, deeply pitted transversely. 



Along streams in wet sand. Los Angeles ; Davidson. San 

 Bernardino, below 2,000 feet altitude, and Big ^Morongo, in the 

 Colorado Desert, 3,000 feet altitude ; Parish. A species widely 

 distributed in warm countries, but in the United States knoAvn 

 only from our region. 

 "^ ^^^^ Styles j-cleft ; achenes j-angled, 



-»- Scales falling away at'ntaturity frotn the persistent rachis of 

 the flattened spikelet. 



l Scales tapering into a curved setaceous tip ; wings inconspic- 

 uous ; stamen i. 



t 4. Cyperus inflexus, ^luhl. Cram. 16 Britt. & Brown, 

 Stamen 7. 111. Fl. 1:137. C. artistatus, Boeckl. Linnaea. 35:500, 

 not Rottb. Watson, Bot. Cal. 2 :214. 



Annual; culms numerous, slender, 2-6cm. tall, about equal- 

 ling the narrow leaves ; inflorescence in a dense head , or 

 2-3-rayed; involucral leaves 2-3, moderately unequal. l-6cm. 

 long ; scales lanceolate, concave, strongly nerved, green, 

 l-5mm long; achenes oblong-obovoid. nuicronulate. bro"wn. dull. 

 1-1. 5mm. long. 



