LEGUMINOS2. 
SILVA OF NORTH AMERICA. 
ROBINIA VISCOSA. 
Clammy Locust. 
FLoweEnrs pale rose-colored, in crowded oblong racemes. 
Branches and petioles clammy. 
Robinia viscosa, Ventenat, Hort. Cels, 4, t. 4; Mém. de 
PInst. Nat. Sci. Phys. & Math. v. 114. — Cels, Mém. de 
UInst. Nat. Sct. Phys. & Math. v. 110. — Willdenow, 
Spec. iii. 11381; Hnum. 769; Berl. Baumz. 372. — Mi- 
chaux, Fl. Bor.-Am. ii. 65. — Nouveau Duhamel, ii. 64, 
t. 17. — Poiret, Lam. Dict. vi. 222. —B. S. Barton, Bot. 
Appx. 29, t. 21. — Persoon, Syn. ii. 311. — Desfontaines, 
Hist. Arb. ii. 302. — Michaux f. Hist. Arb. Am. iii. 262, 
t. 2.— Pursh, Fl. Am. Sept. ii. 488. — Nuttall, Gen. ii. 
118. — Hayne, Dendr. Fl. 140. — Elliott, Sk. ii. 242. — 
Legume glandular-hispid. 
De Candolle, Prodr. ii. 262.—Guimpel, Otto & Hayne, 
Abbild. Holz. 81, t. 65.— Sprengel, Syst. iii, 247. — 
Don, Gen. Syst. ii. 238.— Spach, Hist. Vég. i. 260. — 
Torrey & Gray, Fl. N. Am. i. 295. — Dietrich, Syn. iv. 
1053. — Chapman, Fl. 94. — Curtis, Rep. Geolog. Surv. 
N. Car. 1860, iii. 49.—Sargent, Forest Trees N. Am. 
10th Census U. S. ix. 56.— Watson & Coulter, Gray’s 
Man. ed. 6, 134. 
Robinia glutinosa, Sims, Bot. Mag. t. 560. — Koch, Dendr. 
i. 59. 
A small tree, thirty or forty feet in height, with a trunk ten or twelve inches in diameter, and 
slender spreading branches; or a low shrub five or six feet in height. The bark of the trunk is 
an eighth of an inch thick, smooth, and dark brown tinged with red. The branchlets are dark reddish 
brown during their first season, and clothed with conspicuous dark glandular hairs, which, like those 
on the petioles and legumes, exude a clammy, sticky substance ;' during their first winter they are 
bright red-brown covered with small black lenticels and very sticky, and in their second year turn 
light brown and become dry. The winter-buds, which are minute and protected by a scale-like 
covering, are immersed in the scars left by the leaves of the previous season, and do not appear until 
the beginning of growth in the spring. The leaves are from seven to twelve inches long, with stout 
nearly terete dark petioles slightly enlarged at the base, and from thirteen to twenty-one leaflets which 
are ovate or sometimes acuminate, mucronate, rounded, or pointed at the apex, and wedge-shaped at the 
base. As they unfold the lower surface is covered with soft silky white pubescence, and the upper 
surface is slightly puberulent ; at maturity they are an inch and a half to two inches long, two thirds 
of an inch broad, dark green and glabrous above, and pale and coated with pubescence below, especially 
along the slender yellow midribs and primary veins and on the stout glandular-hispid petiolules. The 
stipules are subulate, chartaceous, and often deciduous or sometimes develop into stout slender spines. 
The flowers, 
which are two thirds of an inch long, appear in June’ in short ovate crowded grandular-hispid racemes, 
The stipels are very slender, and disappear soon after the leaf has reached its full size. 
and are almost inodorous. The slender pedicels are covered with long pale hairs, and are developed 
from the axils of large lanceolate acuminate dark red bracts contracted at the apex into long setaceous 
points which are exserted beyond the flower-buds, and mostly fall before the flowers open. The calyx 
is dark red and covered on the outer surface and on the margin of the subulate lobes with long pale 
hairs. The corolla is pale rose or flesh color, with a narrow standard marked on the inner surface by a 
pale yellow blotch, and broad side petals. The legume is linear-lanceolate, narrow winged, from two 
to three and a half inches in length, and tipped with the remnants of the long slender style. The 
seed is an eighth of an inch long, dark reddish brown and mottled. 
1 See an article by the French chemist Vauquelin (Mem. de ? A second crop of flowers is often produced in August from 
Inst. Nat. Sci. Phys. & Math. v. 105), entitled Experiences sur la shoots developed early in the summer, especially on vigorously 
substance visqueuse qui se rassemble sur I’écorce du Robinia viscosa. growing young trees or in years of abundant rainfall. 
