HOUSE, THE GENUS IPOMCEA 215 



white tube constricted just above the calyx, limb 5-lobed, 4-6 cm. broad; capsules 

 globose, 1 cm. or less thick, 2-celled, 4-seeded; seeds glabrous. 



Mexico: Oaxaca; Las Sedas to La Carbonera, Conzatti & Gonzalez 

 261, 1897 (type~G); La Carbonera, 7200 ft. alt, 804, 1895 (G). 



63. Ipomoea eximia House, Muhlenbergia 3 : 44. pi. 2 f. d. 1907. 



Similar to the preceding species, nearly or quite glabrous; leaf-blades deltoid- 

 reniform or triangular-ovate, 2-2.5 cm. broad, cordate, obtuse, the margin angled 

 or toothed, sparingly hirsute above, finely so on the veins beneath and on the margin; 

 peduncles 2 cm. long or less, 1- to 3-flowered; sepals very imequal, outer ones and 

 the pedicels muricate, oblong-lanceolate, blunt, 5-8 mm. long; corolla very slenderly 

 funnelform, deep rose-purple, 4-5 cm. long, the abruptly expanded limb subentire, 

 3.5-4 cm. broad. 



Type locality: Orizaba, Mexico. 



Distribution: Vicinity of Orizaba. 



Specimens examined: Orizaba Miiller, 1855 (type — C, N). 



10. Dactylophyllse. Stout, twining, perennial vines, the stems woody 

 below; leaf-blades divided into 3 to 9, sessile or stalked leaflets; flowers 

 solitary or usually in irregular corymbose clusters; sepals coriaceous or 

 leathery, obtuse, rarely acute; corolla tube constricted within or just above 

 the caliyTc; capsules thick- walled, ovoid, acute, usually apiculate, 2-celled, 

 4-seeded; the ovary supported by a prominent culpiform disk. 



Coiladena Ra.f. Fl. TeRuv. 4^: 12. 1838. 

 Modesta Raf. 1. c. 75. (in part). 



Leaflets three; sepals unequal. 64. /. ternaia. 



CoroUa white; sepals 10-15 mm. long. 



Corolla red; sepals 8-10 nmi. long. 65. /. lineolata. 



Leaflets five to seven. 

 Sepals 6-7 mm. long. 

 Leaflets Unear to linear-lanceolate, acute at both 

 ends. 



Leaflets Knear or obUnear and revolute. 66. /. fawcettii. 



Leaflets linear-lanceolate, acuminate at both 

 ends, not revolute. 67. /. dactylophylla. 



Leaflets lanceolate to ovate-lanceolate. 



Leaflets oblanceolate, obtuse. 68. I. Carolina. 



Leaflets acuminate. 69. I. furcyensis. 



Sepals 9-10 mm. long or longer. 

 Capsules scarcely exceeding the calyx. 



Stamens exserted; sepals equal. 70, /. horsfalHce. 



Stamens included; sepals unequal. 71. I. rubella. 



Capsules twice as long as the calyx; corolla scarlet 

 or purple. 72. /. plumieriana. 



