122 NORTH AMERICAN FLORA [VoruME 21 
flowered, erect or drooping spikes 7-15 cm. long and 4-10 mm. thick; sepals 1.5~2 mm. long, 
oval or ovate, scarious, 1-nerved, rounded at the apex, 2-3 times as long as the ovate bracts; 
bracts of the pistillate flowers shorter than the utricle, lanceolate or ovate, green, acute, not 
pungent; stigmas 3-5, short, stout; utricle ovoid, 2 mm. long, fleshy, indehiscent, 3-5-angled; 
seed 1 mm. long, lenticular, turgid, obovate, smooth, dark reddish-brown, lustrous. 
Type collected on the margin of brackish marshes, naa mile Creek, Mobile County, Alabama, 
October 4, 1896, Charles Mohr (U.S. Nat. Herb. no. 7218 
DistRiBuTION: Coast of Alabama and Louisiana. 
6. Acnida altissima Riddell; Moq. in DC. Prodr. 13?: 278, hyponym. 
1849. 
Amaranthus altissimus Riddell, Syn. Fl. W. St. 41. 1835. 
Amaranthus miamiensis Riddell, Syn. Fl. W. St. 41. 1835. 
Acnida tuberculata Moq. in DC. Prodr. 13?: 277, 1849. 
Acnida rusocarpa Mog. in DC. Prodr. 132: 277. 1849. Not A. rusocerpa Michx. 1803. 
Acnida tamariscina tuberculata Uline & Bray, Bot. Gaz. 20: 157. 1895. 
Plants glabrous throughout; stems stout, succulent, 3-30 dm. high, smooth or stlcate, 
green or tinged with red, usually much branched, the branches ascending, often flexuous; 
leaves numerous, the petioles slender, 1-7 cm. long, the blades broadly ovate to lanceolate, or 
the uppermost lance-linear, 2.5-15 cm. long, 0.5-5 cm. wide, usually acute or acuminate, 
sometimes obtuse, broadest below the middle and always narrowed toward the obtuse, often 
emarginate tip, obtuse to cuneate at the base, thin, bright-green or yellowish-green; staminate 
inflorescence a densely leafy, narrow panicle composed of few slender, erect or drooping, 
densely flowered spikes 3-12 em. long and 4-12 mm. thick; pistillate panicles narrow, elongate, 
densely leafy, 1-5 dm. long, composed of numerous rigid, erect or spreading, densely flowered 
spikes 2-10 cm. long and 5-10 mm. thick; sepals 2-3 mm. long, oblong to ovate, acute or obtuse, 
mucronate, scarious, l-nerved, equaling or longer than the linear to lanceolate bracts; bracts 
of the pistillate flowers equaling or longer than the utricle, lanceolate or subulate, acuminate 
or attenuate to a rigid pungent tip, green; stigmas 3, elongate; utricle 1.5 mm. long, globose 
or ovoid, thin, smooth or tuberculate, green or red, irregularly dehiscent or indehiscent; seed 
rotund, lenticular, 0.6-0.8 mm. in diameter, smooth, dark reddish-brown, shining. 
TYPE LOCALITY: On an old prairie near Hamilton, Ohio. 
DISTRIBUTION: Swamps and low ground, Ontario to Colorado and Ohio; on ballast in Maine. 
ILLUSTRATION: Britt. & Brown, Ill. Fl. ed. 2. f. 1672 
7. Acnida subnuda (S. Wats.) Standley. 
Montelia tamariscina concatenata A. Gray, Man. ed. 2. 370, as to description. 1856. 
Acnida tuberculata subnuda S. Wats. in A. Gray, Man. ed. 6. 429. 889. 
Acnida tamariscina subnuda Coult. Mem. Torrey Club 5: 145. 1894. 
Acnida tamariscina concatenata Uline & Bray, Bot. Gaz. 20: 158, as to description. 1895. 
Acnida tamariscina prostrata Uline & Bray, Bot. Gaz. 20: 158. 1895. 
Acnida concatenata Moq.; Small, Fl. SE. U. S. 393, as to description. 1903. Not A. cannabina 
concatenata Moq. 1849. 
Acnida tuberculata prostrata B. I,. Robinson, Rhodora 10: 32. 1908. 
Plants glabrous throughout; stems slender, 1-4 dm. long, prostrate or ascending, green 
or whitish, much branched in the pistillate plants, sparingly branched in the staminate plants; 
leaves numerous, the petioles 3-25 mm. long, the blades rounded-obovate, spatulate, elliptic, 
oblong, or lanceolate, 0.7-7 cm. long, 0.2-4 cm. wide, usually broadest above the middle but 
sometimes narrowed toward the obtuse to broadly rounded apex, acute, cuneate, or attenuate 
‘at the base, pale-green or yellowish-green; staminate spikes slender, erect or drooping, 3-8 cm. 
long, 3-5 mm. in diameter, naked or leafy, small few-flowered clusters present in the axils of 
the upper leaves; pistillate flowers in dense, many-flowered, usually remote, @ometimes approxi- 
mate clusters 5-10 mm. in diameter, these collected in elongate leafy spikes 3-15 cm. long, 
and solitary in the axils of most of the leaves; sepals 1.5-2.5 mm. long, oval to ovate or oblong, 
acute or obtuse, mucronate, scarious, twice as long as the bracts; bracts of the pistillate flowers 
lanceolate to subulate, shorter than the utricle, ‘pungent ; stigmas 3, elongate; utricle globose- 
