268 



CYPERACEAE 



2. Fimbristylis thermalis S. Wats. 

 Hot Spring Fimbristylis. Fig. 641. 



Finibristylis thermalis S. Wats. Bot. King's Exped. 360. 1871. 



Perennial by short rootstocks. Culms slender, erect, roughish, 

 3-5 dm. long. Leaves more or less pubescent, flat, 1-2.5 mm. 

 wide, shorter than the culm, sometimes involute above, those of the 

 involucre few, short and narrow ; umbel simple or somewhat com- 

 pound ; spikelets few or several, oblong to subcylindric, 8-18 mm. 

 long, many-flowered ; scales dull, puberulent, mucronate or blunt ; 

 style-branches 2 ; achene lenticular, broadly obovate, longitudinally 

 finely striate, about 1.5 mm. long. 



Hot Springs, Sonoran Zones, Inyo, Kern, and San Bernardino Coun- 

 ties, California; Nevada. Type locality :Ruby Valley, Nevada. 



3. Fimbristylis miliacea (Thunb.) Vahl. 

 Grass-like Fimbristylis. 



Fig. 642. 



S'cii't^us niiliacetis Thunb. Fl. Jap. 

 Finibristvlis miliacea Vahl, Enum. 



37. 1784. 

 2: 287. 1806. 



Annual with fibrous roots ; culms weak, tufted, 7 dm. long or 

 less, angled above. Leaves soft, 1.5-4 mm. wide, the basal ones 

 usually about half as long as the culm, long-attenuate at the apex, 

 those of the involucre similar, but much shorter and narrower, 

 shorter than the loose, large, decompound umbel ; spikelets sub- 

 globose, 2-4 mm. long, their lower scales early deciduous ; scales 

 ovate, the midvein broad; style-branches 3; style villous; achene 

 obovoid, trigonous, brownish, minutely tuberculate, less than 

 1 mm. long. 



San Francisco, collected by A. Wood in 1868; I have seen the specimen 

 preserved in the Gray Herbarium; Florida; Cuba; Trinidad; continental 

 tropical America; Old World tropics. Type locality: East Indies. Fim- 

 bristylis junciformis Kunth and F. cyperoidcs R. Br. are erroneously re- 

 corded from Monterey, California. 



5. ERidPHORUM L. Sp. PL hZ. 1753. 



Bog sedges, perennial by rootstocks, the culms erect, triangular or nearly terete, the leaves 

 linear, or 1 or 2 of the upper ones reduced to bladeless sheaths. Spikelets terminal, solitary, 

 capitate or umbeled, subtended by a one- to several-leaved involucre, or naked. Scales 

 spirally imbricated, usually all fertile. Flowers perfect. Perianth of 6 or numerous filiform, 

 smooth soft bristles, wdiich are white or brown, straight or crisped, and exserted much beyond 

 the scales at maturity. Stamens 1-3. Style 3-cleft. Achene 3-angled, oblong, ellipsoid or 

 obovoid. [Greek, signifying wool-bearing, referring to the soft bristles.] 



About IS species, in the northern hemisphere. Besides the following, 7 others occur in northern and 

 eastern North America. Type species, Erio[>horuin fagiuatiiin L. 



Spikelet solitary; no involucre. 1. F. chainissonis. 



Spikelets several, umbeled; involucre 1-4-leaved. 



Leaves triangular-channeled. 2. £. gracile. 



Leaves fiat, at least below the middle. 3. E. angustifolium. 



1. Eriophorum chamissonis C. A. Meyer. 



Russet Cotton-grass. 



Fig. 643. 



70. 



Eriophornin chamissonis C. A. Meyer; Ledel). Fl. Alt. 1: 



1829. 

 Eriophonim russcolnm Fries, Novit. Mant. 3: 67. 1842. 



Stoloniferous ; culms triangular, erect, smooth, 

 longer than the leaves, 1-8 dm. high. LTpper sheath 

 inflated, bladeless, mucronate, or rarely with a short 

 subulate blade usually borne below the middle of the 

 culm; leaves filiform, triangular-channeled, mucro- 

 nate, 2-10 cm. long ; spikelet erect ; involucre none ; 

 scales ovate-lanceolate, acuminate, thin, purplish 

 brown with nearly white margins ; bristles numerous, 

 bright reddish brown, or sometimes white. 3-5 times 

 as long as the scale ; achene oblong, narrowed at each 

 end, apiculate. 



In bogs. Transition and Canadian Zones; Oregon, north 

 to Alaska, east to Montana, Ontario, New Brunswick and 

 Newfoundland. Europe and Asia. Type locality: Unalaska. 



