254 ANNALS NEW YORK ACADEMY OF SCIENCES 



Convolvulus lacunosus Spreng. Syst. 1: 597. 1825. 

 Convolvulus micranthus Riddell, Syn. Fl. W. St. 70. 1835. 



Type locality: Carolina. 



Distribution: Moist thickets, Pennsylvania to South Carolina, west 

 to Illinois, Mississippi and Texas. 



156. Ipomcea trifida (H. B. K.) G. Don, Gen. Syst. 4 : 280. 1838.— A. 

 ' Gray, Syn. Fl. N. Am. 2 ^ : 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. 

 Ipomcea commutata Torr. Bot. Mex. Bound. 149. 1859. 



Western and southern Texas to western Mexico. 

 Ipomcea trifida (var.) berlandieri A. Gray, 1. c. 

 Central and southern Texas. 

 Ipomcea 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). 



