242 ANNALS NEW YORK ACADEMY OF SCIENCES 



tate, acuminate, 3-5 cm. long, basal lobes produced, half as long as the blade, acute, 

 divergent; peduncles 1-flowered; sepals lanceolate, acute; corolla rose-purple, Umb 

 deeply 5-lobed. 



Type locality: Near Oaxaca, Mexico {Andrkux 212). 

 Distribution: Mountains of Oaxaca. 



Specimens examined: Pringle 4693, 1894 (G, N, C). C. L. Smith 

 910, 1894 (Y, G); Rev. Lucius C. Smith 334, 1895 (G). 



/ 130. Ipomoea urbinei House, Muhlenbergia 3: 41. pi. 2, J. b. 1907. 



ResembUng /. simulans; leaf-blades glaucous and densely pubescent beneath; 

 peduncles 1-2-flowered, slightly longer than the petioles and somewhat confluent 

 with them at the base; sepals unequal, the inner 8-10 mm. long and 2-3 times as 

 long as the outer; corolla scarlet, tubular. 



Type locality: Faldas del Volcan de Coliraa, Mexico. 

 Distribution: Known only from the type locality (Barcena 214, 1881, 

 type-M). 



[ 131. Ipomcea suffulta (H. B. K.) G. Don, Gen. Syst. 4: 276. 1838. 



— Robinson & Greenm. Am. Joum. Sci. 50: 160. 1895. 



— Hallier f. Bull. Herb. Boiss. 7: 411. 1899. 



Convolvulus suffuUus H. B. K. Nov. Gen. & Sp. 3: 102. 1819. 



Type locality: On the volcanic mountain of Jorullo, Mexico. 



Distribution: Mountains of Oaxaca, Mexico. 



Illustrations: H. B. K. 1. c. pi. 211. 



Specimens examined: Pringle 4'^ 55, 1894 (G, N, C). E. W. Nelson 

 1541, 1894 (N, G); 3061, 1895 (N); 2920, 1895 (N G). Rev. L. C. Smith 

 141, 1894 (G). 



18. Anisomeraj. Twining, annual or perennial vines of various habit; 

 stems sometimes woody below, usually not densely pubescent; leaf-blades 

 entire or 3-lobed or toothed, rarely somewhat 5-lobed; sepals coriaceous, 

 very unequal. 



Leaf-blades linear to broadly lanceolate; corolla small. 



Leaf-blades denticulate-hastate at base; corolla white. 132. 7. angustifolia. 

 Leaf-blades sagittate or cordate-sagittate. 



Corolla crimson or purplish. 133. I. tenuiasima. 



Corolla white; leaf-blades subsessile. 134. I. sagittula. 



Leaf-blades ovate in outline. 



Sepals obtuse or merely subacute, not cuspidate. 

 Leaf-blades broadly hastate at the base; thick-tex- 

 tured, basal lobes acute. 135. /. callida. 



