494 PROCEEDINGS OF THE AMERICAN ACADEMY. 
+ + Tubercle distinctly narrower than the achene. 
E. ovata, R. Br. — Figs. 8 to 10. — Habitally resembling 7. obtusa, 
the narrower but obtuse scales darker colored: the deltoid-conical often 
somewhat depressed tubercle about four sevenths as broad and about 
three sevenths as high as the body of the obovate or inverted-pyriform 
achene. — Prodr. Fl. N. Holl. 224 in adn. ; Roemer & Schultes, Syst. ii. 
‘152; Reichenb. Fl. Germ. Excurs. 77 (Heleocharis); Nees, Gen. Fl. 
Germ., ii. t. 18, f. 17-20; Ledeb. Fl. Ross. iv. 245 (Hlaeocharis) ; 
Béckeler, Linnea, xxxvi. 462 (as Heleocharis, excluding H. obtusa); 
Nyman, Consp. Fl. Europ. 766; C. B. Clarke, Jour. Bot. xxv. 268 
(excluding E. obtusa and its syn.); Terracciano, Malpighia, ii. 310 
(excluding Z. obtusa); Richter, Enum. Pl. Europe, i. 143. Scirpus 
capitatus, Schreb. Spic. Fl. Lips. 60 (according to various European 
authors), not Willd. S. ovatus, Roth, Tent. Fl. Germ. ii. pt. 2, 562, 
& Cat: i. 5; Sturm, FI. iii. Heft 10, with plate; Host. Gram. iii. 56; Fl 
Dan. xi. t. 1801; Reichenb. Ic. Fl. Germ. viii. 37, t. 295, £. 700, 7015 
Anders. Cyp. Scand. 11, t.2, £25. 8. compressus, Moench, Meth. 34°. 
S. annuus, Thuill. Fl. Bav. ed. 2, i, 22 (acc. to European authors). 
S. nutans, Bergeret, Fl. Pyren. i. 43 (acc. to European authors). solo- 
niensis, Dubois, Meth. Orl. 249 (ace. to European authors). S. multt- 
caulis, Gmel. Fl. Badens, i. 96. S. turgidus, Pers. Syn. i. 66. Bulbostylis 
ovata, Steven, Mém. Soc. Imp. Nat. Mose. v. 355. Clavula ovata, Dumort. 
Fl. Belg. 143. Eleogenus ovatus, Nees, Linnea, ix. 294.— The com" 
mon form of the species in central Europe. In America definitely known 
from only four stations: ditches and boggy ground, Campbellton, a 
Brunswick, Sept. 4, 1882 (John Macoun) ; shallow pool, Masardis, Maine, 
Sept. 10, 1897 (AL L. Fernald, no. 2837); Middlebury, Vermont, July 
6, 1878 (Zzra Brainerd); muddy places with Z. obtusa, Keweenaw 
County, Michigan, Aug., 1886 (0. A. Farwell, no. 547, in part). Prob. 
ably of wider distribution in Canada and the northern States. 
Var. Hevsert, Uechtritz. — Figs. 15 to 22.— Culms very numerous 
slender and flexuous, often recurved or prostrate, from 3 cm. to 3 dm. 
long, of very different lengths on the same individual : heads dark chest 
nut-brown or purplish; the acutish scales more spreading than im * 
species: tubercles generally less depressed. — Uechtritz in Garcke, ill. 
Fl. Deutschl. Aufl. 17, 625. Z. olivacea, Britton, Jour. N. Y- eae 
Soe. v. 101, in part (as to Dedham plant), not Torr. — Common 1? te 
or springy places or even in shallow water in northern Maine, apparently 
less abundant in eastern Massachusetts. Collected by the writer at the 
