the second edition of his ‘ Manual of the Botany of the 
N. Un. Sts. (1856).”’ Matters, however, did not end here, 
for it was discovered that the H. doronicoides, Lamk., as 
described by American botanists, included two species, 
that so called, and the true H. tuberosus, Linn., and it was 
not till the publication in 1884 of the Order Composite in 
Gray’s ‘‘ Synoptical Flora of N. America ” that H. tuberosus, 
Linn., was definitely restored to its rank as a substantive 
Species, and the origin of the Jerusalem Artichoke. I 
may add that H. doronicoides differs from tuberosus in the 
leaves being all, or nearly all, opposite, sessile, elliptic, 
never cordate, obscurely crenate, the rays much 
broader, and the ovary and achene glabrous. It is figured 
in this work, t. 2778, under the erroneous name of H. 
pubescens, Vahl. 
It remains to add that H. tuberosus is indigenous in the 
Lake region of Canada, as far west as the Saskatchewan, 
and from thence southward to Arkansas and the middle 
parts of Georgia, Another near ally is H. giganteus, Linn., 
of which a figure has been prepared for this work, which | 
will shortly appear. ae 
_ Descr.—Helianthus tuberosus is distinguished from all 
its congeners, by the sum of the following characters: roots 
tuberous ; stem tall, pubescent, branched above; leaves 
petioled, ovate, acuminate, serrate, scabrous above, puberu- 
lous beneath, the upper alternate; heads large; invol. 
bracts, lanceolate, acuminate ; receptacle convex with 
dorsally hirsute scales; disk and ray-flowers both yellow, 
the latter 12-20 in number; achenes with pubescent tips 
and margins,—J, D. H. 
Fig. 1, Involucral bracts ; 2, achene pappus and base of ray-flower; 3, scale 
of receptacle and disk- flower; 5, stamens; 6, style of disk-flower; 7, ripe 
achene; all but 1 enlarged ; 8, root-tubers half of the natural size. 
