1905] Fernald,— North American Species of Eriophorum 85 
+ + Flowering spikelet obovoid or subglobose, o.8-1.5 cm. long: anthers 
I-2 mm. long: fruiting spikelet depressed-globose, broader than high. 
++ Upper sheaths distinctly inflated : culm trigonous and (under the lens) 
scabrous at tip: pits of the receptacle with obtusely angled lower walls. 
E. CALLITRIX, Chamisso. Similar to Æ. vaginatum: but with leaves 
generally scabrous in lines; the 1 or 2 upper sheaths less inflated: the 
flowering spikelet shorter. and broader: the anthers shorter: the 
fruiting spikelet depressed-globose, 2.5-5 cm. broad.— Chamisso in 
C. A. Meyer, Mém. Sav. Étrang. Acad. St. Pétersb. i. 203, t. 2 
(1331); Torr., Ann. Lyc. Nat. Hist. N. Y. iii. 337, (1836), in note; 
Ledeb., Fl. Ross. iv. 254 (1853), not Andersson and other European 
Authors. Æ. caespitosum, Pursh, Fl. i. 57 (1814); Eaton, Man. ed. 4, 
294 (1824); not Host. Æ. vaginatum, Torr., Fl. 65 (1824), Ann. Lyc. 
Nat. Hist. N. Y. iii. 335 (1836), and Fl. N. Y. ii. 358, t. 141 (1843); 
Beck, Bot. 427 (1833); Hook., Fl. Bor-Am. ii. 231 (1839), in part; 
Gray, Man. 529 (1848); Macoun, Cat. Can. Pl. ii. 103 (1888), in part; 
Britton & Brown, Ill. Fl. i. 272 (1896); not L. Æ. Chamissonis, C. A. 
Meyer in Ledeb., Fl. Alt. i. 70 (1829) and Mém. Sav. Étrang. Acad. 
St. Pétersb. i. 204 (1831), as to Altai plant, but not description and 
plate, &c. Æ. capitatum, B, Hook., Fl. Bor. Am. ii. 231 (1839). £. 
virginatum, Eaton & Wright, N. A. Bot. 2 37 (1840). Æ. vaginatum, 
var. humile, F. Nylander, Acta Soc. Sc. Fenn. iii (1852), and in 
Andersson, Bot. Not. (1857) 58. Æ. brachyantherum, Trautv. & 
Meyer in Middend., Reise, — Fl. Ochot. 98 (1856); Palla, Bot. Zeit. 
liv. ab 1, 148, 151 (1896).— Baffin Land and Ungava across North 
America to Behring Sea, and in northeastern Asia to the Altai ; south 
in America to Pennsylvania, Michigan, Wisconsin, and Manitoba. 
Flowering, arctic and alpine regions, June, July; southern New Eng- 
land and Pennsylvania, early May: fruiting, arctic regions, July, 
August; southern New England, &c., late May and early June. 
Var. erubescens. Bristles reddish brown. -—— NEWFOUNDLAND, 
sphagnous soil on rocky hill, Channel, July 27-August r, 1901 
(Howe & Lang, no. 899). 
++ ++ Upper sheaths close or scarcely inflated: culm terete, glabrous at tip: 
pits of the receptacle with rounded lower walls. 
E. opacum, n. comb. Loosely caespitose, forming small tufts 
with few very slender terete glabrous culms (3-6 dm. high): basal 
leaves nearly filiform, glabrous; cauline sheaths often with short 
