476 Supplement 



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

 leaves longer than the rays; spikelets in usually crowded 

 umbels, narrowly linear, 5 cm. long; scales ovate, acutish, 

 2 mm. long, greenish or pale with brown margins, readily 

 separating from the axis; wings broad, scarious, wholly 

 adnate to the rachis and enclosing the achenes; stamens 3; 

 achenes pale, oblong-ovoid, 1 mm. long. 



Los Angeles River, Braunton, Davidson. 



I 



Cyperus lougispicatus Norton. Insert after the preceding. 

 Resembling the last; leaves channeled; umbel compound, 

 loose and spreading or rarely congested; spikelets linear, 

 1-1.5 cm. long; fertile scales oblong, 3 mm. long, obtuse; 

 achenes oblong, 1-1.25 mm. long, obtusely 3-angled, mucron- 

 ulate at the apex. 



Elsinore Lake, Parish. 



Scirpus pacificus Britton. Page 69, substitute for Sf. 

 robustH8, Stems scabrous above; leaves rough-margined; 

 styles 2-cleft. 



Carex comosa Boott. Page 73, substitute for C. pseudo- 

 cy perns amcrlcana. 



Carex lanugmosa Michx. Page 74, substitute for C. fili- 

 formis latifolia. 



Carex senta Boott. Page 75, insert above C. triquetra. 

 Stems slender, 3 dm. high, scabrous on the sharp angles; 

 leaves shorter than the stems, 2-4 mm. wide; staminate spikes 

 1-2; pistillate spikes 2-3, on short peduncles, 3-5 cm. long, 

 4-5 mm. thick; scales narrowly lanceolate; perigynia ovoid or 

 obovoid; achenes light brown, orbicular, smooth, mucronulate. 



Near San Fernando, Breiver ; Cienega, Davidson, according to 

 Parish. 



Carex Hassei Bailey. Insert after the preceding. Stolon- 

 iferous by slender rootstocks; stems slender or filiform, 

 25-50 cm. high; leaves thin, 2-4 mm. wide, much shorter than 

 the stems, long-pointed; staminate spike oblong, acute, 1 cm. 

 long, pedunculate; pistillate spikes 1-5, cylindrical, the lowest 

 remote and usually on a long peduncle; scales green, brown 



