Mandevilla brachysiphon (Torr.) Pichon

Macrosiphonia brachysiphon (Torr.) A. Gray, Syn
Fl. N. Am. 21: 83. 1878.
Eckites brachysiphon Tor. Bot. Mex. Bound. Siurv. 159. 1859.
Erect or diffuse suffrutescent herb, 1-3 dm. tall; leaves ovate to ovate-elliptic, 15-30 mm. long, 7-15 mm. broad, acute at the apex, abruptly rounded to obtuse at the base, minutely puberulent to glabrate on both sides, the petioles 1-2 mm. long; inflorescence bearing 1-3 conspicuous white vespertine flowers, the peduncle obsolete or scarcely manifest; pedicels 5-12 mm. long; caly^c-lobes narrowly oblong, acute to acuminate, 5-7 mm. long, 2-3 mm. broad, somewhat petaloid, minutely puberulent to glabrate; corolla infundibuliform, densely and minutely puberulent-papillate externally, the tube proper 10-15 mm. long, about 1.5 mm. in diameter at the base, the throat narrowly conic or subtubular-conic, 10-12.5 mm. long, about 4 mm. in diameter at the orifice, the lobes obliquely obovate, 7-13 mm. long, widely spreading; follicles slender, continuous or slightly articulate, 8-10 cm. long, minutely puberulent-papillate.
Type locaIvITy: Arroyo de los Janos, Sonera. Distribution: New Mexico, Arizona, and Sonora.

Mandevilla brachysiphon is a plant species with the common name Huachuca Mountain rocktrumpet. It is native to southern Arizona, southwestern New Mexico, Texas, Chihuahua and Sonora. It grows on rocky slopes and plains ion desert and grassland, often on limestone soil.

This is a low plant rarely attaining a height of over 40 cm. It has white, showy flowers that open at night and are very fragrant. The seeds are minutely puberulent.

Mandevilla brachysiphon habitat in the Atascosa Highlands, southern Arizona

Mandevilla brachysiphon là một loài thực vật có hoa trong họ La bố ma. Loài này được (Torr.) Pichon mô tả khoa học đầu tiên năm 1948.