204 



CYPERACEAE 



16. S. criniger Gray. (Fig. 24.) Stems % to 3 feet high, triangular anc 

 striate ; leaves l 1 /^ to 4 inches long, 1^ to 2y 2 lines wide ; spikelets 9 to 18, 5 

 7 lines long, congested in a sessile head; filaments slender, much exserted anc 



exceeding the 6 very long bristles; style 3-cleft: 

 achene oblong, sulcate-triangular, shortly beakec 

 1 line long. 



High mountains, Sierra Nevada, north to Sis- 

 kiyou Co., thence south to Mendocino Co. 



Locs. Monarch Creek, Tulare Co., Hall $ Baboock 5699 ; 

 Peregoy Mdw., Yosemite Park, Jepson 4331; Mt. Dana, 

 Congdon; Kennedy Lake, Tuolumne Co., A. L. Grant 508; 

 Heather Lake, El Dorado Co., Jepson 8175; Placer Co., 

 Carpenter; Siskiyou Mts., Blasdale (bristles almost smooth). 



Ref. SCIRPUS CRINIGER Gray, Proc. Am. Acad. 7:392 

 (1887), type loc. Eed Mt., n. Mendocino Co., Bolander. 



a 



Fig. 24. SCI.FUS CRINIGER 



Gray, a, head of flowers, 

 X 1.; ft, achene and bristles, 

 X 3. 



5. ERIOPHORUM L. COTTON-SEDGE. 



Bog perennials with triangular or nearly terete stems from creeping root- 

 stocks. Leaves linear or the uppermost reduced to sheaths. Spikelets terminal 

 on a leafy or naked stem, solitary or clustered or umbellate, subtended by an 

 involucre of leaf-like bracts or none. Scales membranous, 1 to 5-nerved. 

 Perianth-bristles numerous, filiform, silky-white, becoming greatly elongated ii 

 fruit. Stamens 1 to 3. Style very slender and elongated, 3-cleft. Achene 

 triangular. Species 10, northern hemisphere. (Greek erion, wool, phora, crop, 

 ref ering to the woolly heads. ) 



Bibliog. Fernald, M. L., N. Am. Species of Eriophorum (Rhod. 7:81-92, 129-136, 1905). 



1. E. gracile Koch. SLENDER COTTON-SEDGE. Stems subterete, weak and 

 very slender, 1 to 2 feet high, with one or more erect, very narrow, triangular- 

 channeled leaves; involucre of a single erect colored bract much shorter than 

 the inflorescence ; rays 4 to 6 lines long, slightly nodding, roughish-puberulent ; 

 spikelets 2 to 5, oblong, 3 to 4 lines long ; scales lead-color or blackish ; periantl 

 bristles 6 to 7 lines long in fruit. 



Cold swamps, San Francisco and Sonoma 

 Co. northward. Boreal regions around the 

 earth. 



Locs. Santa Rosa (Bot. Cal. 2:220); San Fran- 

 cisco (Zoe, 2:378). Var. CAURIANUM Fern. (Fig. 

 25.) Scales straw-color or brownish. Northern Sierra 

 Nevada and northward; Grass Lake near Luther Pass, 

 El Dorado Co., Jepson 8090; Sisson, Jepson. 



Refs. ERIOPHORUM GRACILE Koch in Roth, Cat. 

 Bot. 2:259 (1800), type European. Var. CAURIANUM 

 Fern. Rhod. 7:87 (1905), based on spins, from Ore. 

 (Cusick) and Cal. (Sierra Co., Lemmon, and Mt. 

 Shasta, Brown). 



6. HEMICARPHA Nees & Arn. 



Dwarf tufted annuals, with almost filiform 

 stems and leaves. Spikelets small, terminal, 

 terete, solitary or clustered, subtended by a 

 1 to 3-leaved involucre. Scales enclosing a 

 minute hyaline bractlet between the flower and the axis of the spikelet. 



Fig. 25. ERIOPHORUM GRACILE Koch 

 var. CAURIANUM Fern. Cluster of 

 spikelets in fruit, X 1. 



Periantl 



