486 PROCEEDINGS OF THE AMERICAN ACADEMY. 
9 to 12 dm. high. The closely and incisely toothed leaves, the rather 
small blue fiowers, a little over 13 mm. in length, render this species 
readily recognizable. 
SoLanum mARGINATUM, L. f. Suppl. 147. Complete specimens 
agreeing in every detail with this interesting Old World species were 
collected by Mr. C. G. Pringle in the Valley of Mexico, 23 August, 
1896, no. 7336, and at Coutreras, Valley of Mexico, altitude 2400 m., 
14 August, 1897, no. 6667; also by Professor A. Dugés, in “ Ravin 
(cafiada) de Esperanza & 6 km. de Guanajuato” in the summer of 1897. 
The species is well illustrated in Jacq. Ic. Rar. t. 45. 
Datura pruinosa. Herbaceous: stems, at least above, covered 
with a fine short close pubescence: leaves ovate or ovate-oblong, 3 to 
8 cm. long, one half to two thirds as broad, repand-dentate, acute oF ob- 
tusish at the apex, unequal at the base, puberulent on the upper surface, 
pruinose-pubescent beneath: petioles 1 to 4 cm. long, pubescent: flowers 
erect, pedicellate: pedicels during anthesis 4 to 8 mm. long, later be- 
coming slightly elongated and reflexed: calyx tubular, 5-lobed, 3 10 
4 cm. long, densely pubescent especially toward the base; lobes ovate- 
lanceolate, acute, somewhat unequal: corolla white, 5 to 6 cm. long, 
glabrous or nearly so; lobes tipped with a slender acumination: stamens 
included ; filaments glabrous, adnate to the corolla-tube for one half its 
length: capsule pendulent on the reflexed pedicels, subglobose or slightly 
these 
light brown, pitted. — Collected by Rev. Lucius C. Smith, Cuicatlan, 
Oaxaca, altitude 550 m., 16 October, 1894, and 7 October, 1895, no- 9435 
also by C. G. Pringle, Valley of Oaxaca, altitude 1540 m., 8 July, 1897, 
no. 6732. A species readily recognized by the small flowers. and the 
fine close pruinose pubescence of the young leaves and the tips of the 
young branches. Most nearly related to D. Metel, L. : : 
Distictis laxiflora. Pithecoctenium laxiflorum, DC. Prodr. ™* 
195. Having at hand numerous and perfect specimens of the above 
species, it is evident, from the fruiting characters, that its affinity . 
with the genus Distictis rather than Pithecoctenium. To DeCandolles 
excellent description, drawn, however, from a flowering specime 
may be appended the following : — climbing: flowers, ev 
‘specimen, from 4 to nearly 10 cm. long, purple or violet: caps 
oblong or lance-oblong, narrowed at either end, in the dried state id 
9m. long, about 4 cm. broad, often slightly curved, smooth, glabral®, 
longitudinally ridged along the midrib and margins of the valves, Ar 
les ovate 
