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154 UNITED STATES AND MEXICAN BOUNDARY. 
Several other species of this difficult genus are in the Mexican Boundary Collection, but they 
cannot at present be determined satisfactorily, either from the imperfection of the specimens, or 
for want of the means of comparison. 
MARGARANTHUS SOLANACEUS, Schlecht. Ind. Sem. Hort. Hal. 1838, p. 8, & Hort. Hal. p. 1, t. 
1; Dunal, l. с. p. 453. Santa Rita del Cobra, New Mexico, July—August; Bigelow. (No. 
1603, Wright.) No. 1220 of Coulter's Mexican Collection. Our New Mexican specimens and those 
of Mr. Wright are considerably smaller than the plant represented by Schlechtendal, but his 
figure was taken from a cultivated specimen. Coulter’s plant agrees exactly with the figure. 
Lycrum PALLIDUM, Miers, IH. S. Amer. PI. 2, р. 108, t£. 67, С. Gravelly hills near the Rio 
Cibolo of the Rio Grande ; also in Chihuahua and near the Copper Mines, New Mexico, April— 
July ; Bigelow. (No. 766; Fendler.) It was also found by Frémont in 1844, on the Rio Virgen, а 
branch of the Colorado, western New Mexico. A shrub 3-4 feet high. Flowers greenish, larger 
than in any other North American species of this genus. It is remarkable for the loose cam- 
panulate calyx, the broad obtuse divisions of which are longer than the tube. 
Lycrum STOLIDUM, Miers, l с. p. 126, t. 71, O. On the Rio Grande, from the Presidio down 
to Laredo, May ; Schott. (Nos. 540 and 1610, Wright.) 
LYCIUM BARBINODE, Miers, 1. c. p. 115, t. 68, E. On the upper Rio Grande and westward to 
the Rio Grande, March—April. А shrub about 5 feet high. ze l- 4.4 22 ss 
LYcIUM BERLANDIERI, Dunal in DC. Prodr. 13, pars 1, p. 521. Borders of the Rio Grande, 
from El Paso to Eagle Pass, March—April. Nos. 1604 and 1608, Wright, seem to be hardly 
distinct. A branching shrub 2-6 feet high. Flowers pale purples E 
DATURA METELOIDES, DC. MSS. ; Dunal, l. с. р. 544. Western Texas, Chihuahua, Sonora, 
and other Mexican States ; common.* (No. 1606, Wright.) 
sigs This fine Datura, which has all the appearance of being indigenous in New Mexico and the adjacent provinces of Mexico, 
must be the D. meteloides named by De Candolle, and described by Dunal in the Prodromus from one of the drawings by 
Мосіпо and Sesse. But the distinctions between it and D. Metel are not well stated ; nor did Dunal himself identify the specie 
in the specimens from Berlandier’s collection, No. 2156, gathered at Victoria, Tamaulipas, but referred them to D. Metel, 
and, in consequence, Alphonse De Candolle, in the Geographie Botanique, 2, p. 135, allowsthem to have considerable weight in 
favor of the American origin of D Metel. The only reason for doubting our New Mexican plant to be De Candolle’s D. mete- 
loides is, that Dunal described it as having a * corolla 10-dentata,’ which our plant has not. But the slight folds answering to 
the sinuses may have been exaggerated and misunderstood. From seeds gathered by Mr. Wright this species has been culti- 
vated in the Cambridge Botanic Garden for several years, бог the past two years by the side of Datura Metel. The leading 
diagnostic characters of the two may be expressed, as follows : 
“D. Meret, Linn : viscidulo-pubescens ; caule subvilloso ; corolle tubo ultra calycem sensim modice dilatato, limbo 10- 
dentata ; basi calycis persistente subcapsula ampla. 
“ D. METELOIDES, DC.: pruinoso-glaucescens, vix заналыг ; flore suaveolente ; corolla supra calycem cylindricum valde 
dilatata, limbo eximie 5-dentato ; basi calycis subcapsula persistente angusta ; foliis integerrimis. 
** D. meteloides, although with us a lower plant than D. Metel, is more showy ; its corollas (tinged with bluish purp' е) are 
more dilated-funnelform and larger, measuring 5 or 6 inches in diameter of the limb, and often 8 inches in length ; and what 
may be called the limb is on each side equal in length to the part of the tube which projects beyond the calyx. In D. Metel 
the throat is much narrower, and the limb proportionally smaller, say 4 or 4! inches in diameter. In D, meteloides there are 
no teeth or projections whatever at the sinuses of the corolla, nor does the slight plaiting there give the appearance of teeth ; but 
the five proper teeth are very salient, narrowly subulate, and half an inch in length. The capsule is nearly glabrous, and with 
shorter prickles than the cultivated D. Mete], but otherwise similar, as are the seeds; the persistent and reflexed base of the 
calyx, however, is much smaller. The herbage has somewhat of the disagreeable odor of D. Metel, but the flowers are sweet- 
scented.” A. Gray. 
