1905] Fernald,— North American Species of Eriophorum 87 
long), in anthesis narrow-ovoid, 7-10 mm. long, in fruit 1.5-2 cm. 
long: scales lead-color or blackish, ovate to short-oblong, 2.5-4 mm. 
long, all but the outermost blunt or rounded-tipped: anthers linear, 
1-2 mm. long: achenes linear-oblanceolate, blunt, compressed, 
trigonous, 1.5-2 mm. long: bristles white.— Koch in Roth., Cat. ii. 
259 (1800); Torr., Ann. Lyc. Nat. Hist. N. Y. iii. 341 (1836); Reich., 
Ic. Fl. Germ. viii. t. 290 (1846); Gray, Man. 529 (1848), in part; 
Engl. Bot. Suppl. iv. t. 2886 (1849) aud ed. Syme, x. 74, t. 1607 
(1873); Ett. & Pok., Phys. Pl. Austr. vi. t. 533 (1873) : Watson, Bot. 
Cal. ii. 220 (1880), in part; Palla, Bot. Zeit. liv. ab. 1, 148,151 (1896); 
Britton & Brown, Ill. Fl. i. 273 (1896), in part; A. A. Eaton, Bull. 
Torr. Club, xxv. 340 (1898); Britton, Man. 182 (1901). Linagrostis 
paniculata, B, Lam., Fl. Fr. iii. 555 (1778). Eriophorum triquetrum, 
Hoppe, Taschenb. (1800) 106. Æ. polystachyon, var. tenellum, Gray, 
Gram. & Cyp. pt. 1, no. gr (1834), in part. Æ. angustifolium, Torr., 
Ann. Lyc. Nat. Hist. N. Y. iii. 339 (1836), in part, not Roth. AZ. 
angustifolium, D? brevifolium, Torr., l. c. 340 (1836), in part.— Cold 
swamps and bogs, Gulf of St. Lawrence to Hudson Bay and British 
Columbia, south to Connecticut, Pennsylvania, Michigan, Nebraska, 
and California. Northern Europe and Asia. Flowering, April, May ; 
fruiting May-July. 
Var. caurianum.  Involucre and scales straw-color or brownish: 
achenes 2.5-3 mm. long. — OREGON, subalpine regions, 1886 (W. 
C. Cusick, no. 1450): CALIFORNIA, Sierra County, 1874 (7. G. Lem- 
mon); south side of Mt. Shasta, alt. 5000—10,000 feet, July, 1897 
(12. E. Brown, no. 628). A somewhat coarser plant than true Z. 
gracile, but with the characteristic short blunt upper leaf. 
+ + Upper cauline leaf with the sheath shorter than the blade. 
E. TENELLUM, Nutt. Culms stiff, obtusely trigonous, scabrous 
above. 3-9 dm. high, with long slender green sharp-pointed often 
scabrous basal leaves: sheath of the upper cauline leaf 2.5—8 cm. long; 
the scabrous sharp-pointed blade 3-18 cm. long: involucral bract 
straw-color to reddish-brown at base, 1.5-6 cm. long: spikelets 3 to 
6, mostly on unequal scabrous peduncles (0.5-3.5 cm. long), in fruit 
2—2.8 cm. long: scales greenish straw-color to reddish brown, 2.5-5 
mm. long: achenes linear-oblong, 2.5-3 mm. long, short-beaked : 
bristles whitish. — Gen., Additions (1818); Palla, Bot. Zeit. liv. ab. 
I, 148, 151 (1896). Æ. polystachyon, var. tenellum, Gray, Gram. & 
