136 © UNITED STATES AND MEXICAN BOUNDARY. 
usculis; interdum serrulato-repandis supra scabriuscule pubescentis subtus velutino-tomentosis ; 
pedunculis corymbosis rufo-tomentosis ; calyce cylindraceo-ovato, dentibus subulato-acuminatis ; 
corolla infundibuliformi calyce duplo-longiore glabriuscula. Near Monterey, Mexico; Dr. 
Edwards, Gregg. New Leon; Thurber. May. . Cretaceous hills around Ringgold Barracks 
on the Rio Grande; Schott. (No. 304, Berlandier.) А shrub or small tree, sometimes attaining 
a height of 15 or 20 feet. Leaves 3-4 inches long, and 2-3 inches wide. Flowers in terminal 
corymbs. Corolla an inch and a half long, white, with a yellow centre. Stamens 5, shorter 
than the corolla; filaments slender; anthers oblong. Style twice bifid; the lobes obtuse, 
flattish. Fruit enclosed in the enlarged calyx, oblong, with a thin pulp. Епдосагр thick and 
bony. Albumen none; cotyledons foliaceous, much plicate and veiny. The Mexicans call this 
plant Nacahuita. Dr. Gregg says that the fruit is eaten by cattle and hogs, and that a decoc- 
tion of the leaves is used for pains in the limbs. It is closely allied to C. Sebestena, Linn. (C. 
speciosa, Willd., which grows on Key West); but differs in the soft velvety undersurface of the 
leaves, the shorter calyx with more pointed teeth, etc. 
EHRETIA ELLIPTICA, DC. Prodr. 9, p. 503. Texas; Wright. Near Corpus Christi; Major 
Eaton. Near Monterey, Mexico to Camargo; Gregg. Santa Rosa, Chihuahua; Bigelow. 
Between Ringgold Barracks and the mouth of the Rio Grande; Schott. September. (Nos. 
233, 236 and 900, Berlandier.) A tree 20-30 feet high, and often nearly a foot in diameter, 
with gnarled branches. Flowers sometimes tetramerous. Fruit the size of a large pea, yellow, 
with a thin edible pulp. - | 
PTILOCALYX GREGGII, Torr. Ё Gray, Bot. Pope's Rep. р. 14,4. 8. Rocky places on the Rio 
Grande, from El Paso to the Presidio. (Nos. 492 and 1583, Wright.) A shrub 1-3 feet high, 
with small oval leaves ; remarkable for the spherical clusters of flowers and plumose calyx- 
segments. 
STEGNOCARPUS CANESCENS, Torr. & Gray, l. ce., p 13, t. Т. Coldenia? (Stegnocarpus) canescens, 
DO. Prodr. 9, p. 559. Dry hills near El Paso, etc., March—May. (Nos. 836, 959, 2256, 
2389, Berlandier.) i ° 
TIQUILIA BREVIFOLIA (Nutt. herb.): annua; foliis ovatis, 3-4 veinis; staminibus inclusis. Torr. 
in Bot. U. S. Expl. Exped. ined. t. 12. Desert west of the Colorado, California, March ; Schott. 
This plant was found by Major Emory in 1846, in the same desert; but his specimens were 
collected in the winter, and were too imperfect for determination. T. dichotoma, Pers., (Col- 
denia? dichotoma DC.,) differs in being suffrutescent and in having lanceolate leaves. Late in 
the season the leaves become rigid and hispid. The remarkable character of the lobed coty- 
ledons in this genus was pointed out to my friend Dr. Gray many years ago. It is fully 
described in the Botany of the United States Exploring Expedition. Mr. Bentham has noticed 
it in Hook. Jour. Bot. & Kew Miscell. 3, p. 296. 
Var. PLICATA : foliis oblongis utrinque 5-7-veniis plicato-rugosis. With the preceding. 
Leaves remarkably plicate between the veins. Late in the season the stem of this becomes hard 
and ligneous, so that, without examining the root, the plant might be considered as frutescent. 
Eppya HISPIDISSIMA, Torr. & Gray, Bot. Pope's Rep. p. 110,1. 9. Gravelly hills near El Paso, 
New Mexico; March—May. (Nos. 485 and 1557, Wright.) 
HzLrorRoPIUM CuRassAVICUM, Linn.; DO. Prodr. 9, p. 538. Sandy places, especially on the 
