APPENDIX. 1065 



8a. Eleocharis obtusa Schultes. BLUNT SPIKE-RUSH. Differs from 

 Eleocharis ovata in the pale scales of the spike and in the tubercle, which is 

 nearly or quite as broad and about one-third as high as the achene. In 

 wet soil, N. S. to Fla., Br. Col., Kans. and Texas. 



P. 170, before Eleocharis acicularis, insert: 



loa. Eleocharis Smallii Britton. SMALL'S SPIKE-RUSH. Perennial; 

 alms rather stout, about 6 dm. high and 2-3 mm. thick. Summit of the 

 basal sheath oblique; spikelet cylindric, acute, about 1.5 cm. long, about 

 as thick as the culm; scales narrowly lanceolate-oblong, acuminate; 

 achene dark brown, obovate, turgid-lenticular, somewhat Jiining, 

 1.5 mm. long, rounded at the top; tubercle bulb-like, constricted at the 

 base, one- fourth as long as the achene and about one-half as wide; bristles 

 about as long as the achene and tubercle. Valley of the Susquehanna 

 River, Pa. Aug.-Oct. 



P. 171, after Eleocharis intermedia, insert: 



2ia. Eleocharis Macounii Fernald. MACOUN'S SPIKE-RUSH. Annual, 

 similar to E. intermedia, but with stouter culms, longer, narrower, elliptic- 

 lanceolate, densely flowered spikelets about I cm. long. Scales dark 

 brown; achene compressed-trigonous, obovate, light brown, shining, 

 tubercle deltoid-conic, about half as long as the achene; bristles down- 

 wardly barbed, about as long as the achene and tubercle. Borders of 

 marshes, North Wakefield, Quebec. 



P. 178, after Scirpus validus, insert: 



i5a. Scirpus heterochaetus Chase. UNEQUAL-BRISTLED BULRUSH. Simi- 

 lar to S. validus, but more slender, though about as tall. Umbel com- 

 pound, of 9-17 ovoid-oblong acute spikelets 8-12 mm. long; scales reddish 

 brown, ovate-oblong, emarginate, glabrous, the excurrent midvein sca- 

 brous; style 3-cleft; bristles 2-4, usually 2, unequal, fragile shorter 

 than the achene, retrorsely barbed; achene obovate, trigonous, 2.5-3 

 mm. long. Lakes and ponds, Vt. to N. Y., 111., Minn., Nebr. and Ore. 



P. 179, after Scirpus robustus, insert: 



iga. Scirpus Fernaldi Bicknell. FERNALD'S BULRUSH. Slender, 

 rather pale green, the sharply three-angled culms 4-8 dm. high; leaves 2-6 

 mm. wide, slenderly attenuate, the longer ones often surpassing the culms; 

 primary involucral leaf erect, mostly 1.5-2 dm. long; spikes rather pale, 

 short-ovate or finally broadly ovate, 1-1.5 cm - long, 1-3 in a sessile cluster 

 or stipitate, and 1-5 borne on slender, stiffly flexuous or crinkled, wiry, 

 diverging peduncles 2-7 cm. long; scales finely close-puberulent, the lower 

 ones often somewhat spreading, becoming bifid and finally lacerate, the 

 midvein excurrent in a recurved awn 3-12 mm. long; achene yellowish 

 brown and shining, broadly truncated, obovoid-cuneate, 2.5-3 mm. long 

 and broad, almost equally trigonous or slightly depressed-trigonous with 

 rounded angles or the dorsal swelling more or less umbonate, short- 

 mucronulate; bristles fugacious, shorter than or equal to the achene. 

 Mt Desert, Me., shore of Somes Sound with S. paludosus, Aug. 20, 1898. 



*gb. Scirpus paludosus A. Nelson. Low MARSH BULRUSH. Similar to 

 S. robustus Pursh, but lower and more slender, with shorter, narrower 

 leaves and more densely clustered, sessile, mostly ovate or ovate-oblong, 

 dark brown spikes; culms 1.5-6 dm. high, stiff and often very slender, 

 usually growing in close colonies, the leaves 1-4 mm. wide. Resembles 

 S. interior Britton, of the prairie region, but the spikes are much 

 darker, the achenes more truncate-obovate and more bluntly angled. 

 From Can. and New Eng. to N. J. and at alkaline inland stations, flower- 

 ing from 2-4 weeks earlier than S. robustus. 



