254 
ANNALS NEW YORK ACADEMY OF SCIENCES 
Convolvulus lacunosus Spreng. Syst. 1: 597. 1825. 
Convolvulus micranthus Riddell, Syn. FI. W. St. 70. 1835. 
Type locality: Carolina. 
Distribution: Moist thickets, Pennsylvania to South Carolina, west 
to Illinois, Mississippi and Texas. 
156. Ipomoea trifida (H. B. K.) G. Don, Gen. Syst. 4: 280. 1838.— A. 
Gray, Syn. FI. N. Am. 2 1 : 212. 1878.— Small, 1. c. 963. 
Convolvulus trifidus H. B. K. Nov. Gen. & Sp. 3: 107. 1819. 
Convolvulus hepaticifolius Willd.; Roem. & Schult. Syst. 4: 303. 1819. 
Type locality: In woods along the Orinoco river, between Carichana 
and San Borja, Venezuela. 
Distribution: Southern Louisiana and Texas to Central and South 
America. Also in the West Indies. 
Ipomoea trifida (var.) torreyana A. Gray, 1. c. 
Ipomoea commutata Torr. Rot. Mex. Bound. 149. 1859. 
Western and southern Texas to western Mexico. 
Ipomoea trifida (var.) berlandieri A. Gray, 1. c. 
Central and southern Texas. 
Ipomoea trifida ymalensis var. nov. 
Glabrous, twining; leaf-blades ovate, entire or shallowly 3-lobed or angled, cor¬ 
date or cordate-hastate, acuminate, thin, pale-green beneath; peduncles elongated, 
stout, 3-many flowered; sepals oblong-lanceolate, 9-11 mm. long; corolla less than 
2 cm. long. 
Mexico: Ymala, Palmer 1746 , 1891 (type — Y, N); Palmer 1708, 1891 
(Y, N). 
157. Ipomoea peninsularis Brandegee, Zoe, 5: 168. 1903. 
Slender, twining from a perennial, tuberous root, pubescent; leaf-blades ovate, 
acuminate, deeply cordate, basal sinus often closed and clasping the stem in young 
leaves, 5-6 cm. long; peduncles 3-6 cm. long, 1- to 3-flowered; sepals ovate, 4-5 mm. 
long, glandular-muricate; corolla about 15 mm. long, pale-violet. 
Type locality : Western slopes of the Cape region, Lower California. 
Distribution: Lower California and western Mexico. 
Specimens examined: Lower California, Brandegee, 1902 (N). Jalisco; 
Barcena 553, 1887 (M). 
