156 The Botanical Gazette. [April, 
somewhat different, occurring mostly in Florida. This, in 
view of its comparatively slight variation from the species has 
prompted us to reduce it to a variety. A. Floridana stands 
as a distinct species. Of the inland and western forms there 
seems to be but one polymorphous species, consisting chiefly of 
tall erect plants with small indehiscent utricles (A. ¢amariscina 
tuberculata Mogq.), although the original form of the group 1s 
characterized principally by a dehiscent utricle. According 
to priority these inland forms become A. ¢amariscina. 
Finally, there is the definite shading toward Amaranthus, 
which is seen in certain specimens, which seem to defy all 
attempts at classification. This tendency is seen mostly in 
the appearance of minute sepals, varying in number. As this 
is the principal difference between Acnuida and Amaranthus, 
it would seem that the generic rank of Acnida is not yet 
finally established. 
SYNOPSIS OF THE SPECIES. 
Fruit angled (Atlantic coast). 
Utricle fleshy, turning black. 
r"iong or lee SS A. cannabina australs. 
St04 oon. SS A, eee, 
Utricle thin and small. . . . A. Floridana. 
Fruit not angled, 1™ long (interior). 
Utricle indehiscent. 
Plant erect, inflorescence spicate, A. tamariscina tuberculata. 
Plant erect, spikes glomerulate, A. samariscina concatenata. 
Plant prostrate . . . . . A. tamariscina prostrata. 
Utricle circumscissile . . . <A. tamariscina. 
I, A. CANNABINA L. Sp. Pl. 1027. 1753. 
rusocarpa Mx. F1. Bor.-Am. 2: 234. pl. 50. 1803. 
. Salicifolia Raf. Am. Month. Mag. 2: 43. 1817. 
. obtustfolia Raf. (and vars.) New Fl. N. Am. 1: 53-55. 1836. 
. cannabina salicifolia Mog. DC. Prodr. 137: 278. 1849. 
Tall, with leaves long, lanceolate, tapering at both ends: 
inflorescence naked and slender: bracts short: utricle mostly 
smooth, but sometimes rugose on the angles, orbicular, turn- 
ing black in maturity: stigmas spreading: staminate flow- 
ers large, characterized by the oblong obtuse scarcely mucro- 
nate sepals.—-River-banks and salt marshes in the Atlantic 
Coast Region from New England to South Carolina. Type 
unknown. 
by Dafa 
