32 SOUTHERN CALIFORNIA ACADEMY OF SCIENCE!:^. 



Widely distributed, but nowhere abimdant: ascending the 

 mountains to 5,000 feet altitude, and reaching the borders of 

 the Mojave Desert. Strawberry Valley, San Jacinto ]\Iount- 

 ains: 2623 Hall. San Juan Hot Springs; Xevin. Wet sand 

 banks, Lytle Creek, near San Bernardino, and Mojave River, 

 near Hesperia : Parish. From Ontario and British Columbia to 

 Florida and Mexico. 



W Scales acute or obtuse, without setaceous tips; stamtns j ; 

 umbel with elongated rays, or rarely condensed. 



II Wings scarious, soon separating from the rachis to the base ; 

 annuals. 

 ^ 5. Cyperus erythrorhizos, ]Muhl. Gram. 20. 



Culms rather stout, 1-lOm. tall: leaves about 5mm. wide, 

 rough margined, usually exceeding the culms, those of the in- 

 volucre 4-6, one or two of them much exceeding the rays: 

 umbel simple or compound, few-rayed: spikelets 1-1. 5mm long, 

 linear, acute, numerous in the elongated oblong spikes : scales 

 narrowly oblong, 5mm. long, acute, mucronulate, bright chest- 

 nut; achenes sharply three angled, oblong; pointed at both 

 ends ; half the length of the scale. 



Reported in the Botany of California to have been collected 

 ""in the Colorado Valley," by Newberry. An immature speci- 

 men of Alderson's from San Diego Co.. may belong here. From 

 Northern ^Mexico to the borders of British America. 

 ^'^ 6. Cyperus Parishii, Britton, n. sp. 



"Annual with fibrous roots: culms tufted, slender, 1-2. 5dm. 

 tall: 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, 

 but sometimes congested, the rays 0.5-5cm. long, slender ; spike- 

 lets numerous, densely short-spicate, linear, acute, 12-20mm. 

 long, about 2mm. wide: rachis at length wingless, the narrow 

 wings early deciduous; scales oblong, lanceolate, purple-green, 

 obtuse, about 2mm. long, several-nerved; achenes narrowly ob- 

 ovoid-oblong, nearly black, obtuse, mucronulate, about half as 

 long as the scale, obtusely trigonous. 



"Southern California to Arizona and New Mexico. T}^e, 

 Parish, n. 3816, vicinity of San Bernardino, California, October 

 15th, 1895." (Britton in' lit.) 



Growing in wet sand, on the banks of streams. Besides 

 the type, we have it from Rock Creek, Los Angeles Co. ; David- 

 son, and Edgar Canon, 3,500 feet altitude, San Bernardino 

 :\rountains; 1887 Parish. 



Plate III. Plant collected at San Bernardino, X , '2 -a. Scale Xfo. 

 b — Achene X 25. 



