216 Plants from Sinaloa, Mexico. [ZOE 
Macrosiphonia hypoleuca Muell. Arg. Cerro Colorado. 
Stemmadenia Palmeri Rose. Cofradia. 
Philibertia crassifolia Hemsley. Compared with 4849 of 
Pringle’s collection from Oaxaca, the follicles are slightly more 
pnbescent, the corolla perhaps of thicker texture and less pu- 
bescent. Growing in a single locality on the banks of the 
Tamazula River near Culiacan, where the seed may have been 
brought from the mountains. 
Metastelma cuneata. Twining 2-3 m., glabrous excepting 
the pubescent lines of the stem; leaves ovate-lanceolate, acumi- 
nate, cuneate or nearly obtuse at base, the largest 3 cm. long, 17 
mm. wide, on petioles 7 mm. long; peduncles 1 mm. long 
equalling the 4-9 pedicels; calyx 1 mm. long, the lobes obtuse; 
corolla 2 mm. long parted nearly to the base into 5 linear, acute 
lobes that are glabrous within;. column o.5 mm. long; the 
minute scale of the corona attached at its summit and not exceed- 
ing the anthers; fruit unknown. 
Collected at Yerba Buena near Altata. 
Asclepias Mexicana Cay. Cerro Colorado. 
Asclepias Curassavica 1,. Culiacan and Cofradia. 
Asclepias albicans Watson. Altata. 
Melinia Mexicana. Stems filiform, branching from the root, 
somewhat twining, 3 dm. long, sparingly pubescent; leaves 
opposite, narrowly linear, 2.5 mm. long, distinctly petioled, 
acuminate; peduncles about 4-flowered, 3 mm. long equalling 
the pedicels; flowers campanulate; corolla 5-parted; lobes 2.5 
mm. long, reflexed, puberulent at the tips, linear; sepals lanceo- 
late, acuminate, nearly equalling the corolla; scales of the crown 
distinct, triangular-subulate, half the length of the corolla lobes; 
terminal membrane of the anthers oblong, slightly surpassed by 
the columnar entire beak of the stigma; follicle tapering from 
near the base to the tip, 4 cm. long, 7 mm. wide, glabrous. 
Cerro Colorado. | 
Ipomeea crinita. A climbing woody vine: stems, peduncles 
and petioles pilose with white spreading hairs 4-5 mm. long; 
leaves broadly ovate, 7-nerved at the base, with few hairs on the 
lower face and the nerves of the upper, 3-lobed more or less 
