1907] HOUSE—NEW CONVOLVULACEAE 409 
obtuse base, apex acute or the larger leaves obtuse and somewhat 
3-lobed at apex, 4-6°™ long, 2-4°™ broad, more densely white tomen- 
tulose and pubescent beneath than above: peduncles about 1°™ long, 
the two bracts approximate to the calyx, linear-spatulate or some- 
times subfoliaceous, 14-16™™ long or rarely longer: sepals equal, 
ovate-lanceolate, attenuate, about 15™™ long, glabrous within: corolla 
white, about 6°™ long, pubescent without in bud, strigulose without 
on the margins of the plicae when expanded: stamens less than half 
the length of the corolla; filaments glandular-pubescent and expanded 
below: stigma capitately 2-lobed; ovary 2-celled. 
Mexico: State of Queretaro, Hacienda Ciervo, between San Juan del Rio 
and Cadereyta, Rose and Painter 9660, Aug. 20, 1905;“type, sheet no. 453150 
in U. S. Nat. Herb. Del Ciervo et Cerro de la Messa, Dr. Altamirano 1557, 
Aug. 20, 1905. 
The mature capsules and seeds of this remarkable species have not been seen, 
but it is closely related to a group of species of similar habit abundantly repre- 
sented in the Brazilian flora, with thick-walled ovoid capsules and seeds with a 
coma of hairs on the dorsal angles. In North America its nearest but by no 
means close allies are I. petrophila House and I. longifolia Benth., natives of 
regions much further north. 
Ipomoea glabriuscula, sp. nov.—§ OrtHIPoMOEA; Arborescentes. 
—Erect, woody and probably tree-like, glabrous or nearly so: leaf- 
blades ovate, short-acuminate, shallow cordate, 5-8°™ long, 4-7°™ 
broad below the middle, glabrate above, minutely and sparingly 
pubescent beneath; petioles 3-4°™ long, slender: peduncles exceed- 
ing the subtending petioles, often the blades, 4-12°™ long, branching, 
| 4—many-flowered; pedicels about 1°™ long, not thickened: sepals 
unequal, orbicular, glabrous, the outer ones 4.5-5™™ long, the inner 
6-7™™ long: corolla white, slender funnelform, about 6°™ long, 
glabrous or with some slight pubescence on the plicae without. 
“Guatemata: Enrigue Th. Heyde, 1892; type, sheet no. 256072 in the U.S. 
Nat. Herb. 
Related to I. fistulosa, from which it differs by its glabrous or nearly glabrous 
calyx and corolla, its broader and spetbe shorter leaf-blades, and the young 
parts glabrous. 
Ipomoea nicaraguensis (Donnell Smith).—Ipomoea fistulosa var. 
nicaraguensis Donnell Smith, Bor. GAZETTE 19:256. 1894.—$ ORTH- 
IPOMOEA; Arborescentes.—A small tree with velvety canescent twigs: 
