HOUSE, THE GENUS IPOMCEA 221 



/ 76. Ipomcea bombycina (Choisy) Benth. & Hook. Gen. PI. 2: 873. 



1876. 



Bombycospermum mexicanum Presl. Reliq. Haenk. 2: 137. pi. 71. 1837. 

 Batatas bombycina Choisy, in DC. Prodr. 9: 340. 1845. 



Leaf-blades ovate, acuminate, rounded or obtuse at the base, 8-10 cm. long, 

 glabrous above, pubescent beneath; flowering racemes 5-15 cm. long, manj^-flowered; 

 pedicels about 1 cm. long; sepals ovate, 4-6 mm. long, obtuse, silky-pubescent; 

 corolla about 4.5 cm. long, the tube 1.5 cm. long by 3 mm. thick, the limb campanu- 

 late, 3 cm. long and about 1 cm. thick, silky-pubescent without, purplish; capsules 

 1.5-2 cm. high and 7-8 mm. thick. 



Type locality : Western Mexico. 

 Distribution: Southwestern Mexico. 



Specimens examined: Guerrero; Tecpan, Langlasse 939, 1899 (N), 

 Acapulco; Palmer 370, 1894-95 (N, G). 



13. Palmatae. Twining, annual or perennial vines, with palmately or 

 digitately divided leaf -blades; seeds hirsute or lanata on the dorsal angles. 



Modesta Raf. Fl. Tellur. 4: 75. 1838 (in part). 

 Segments of the leaf-blade parted nearly or quite to the 

 petiole. 



Margin of the corolla-limb crenulate. 77. /. Cavanillesii. 



Margin of the corolla-limb not crenulate. 



Peduncles stout, 1-9-flowered; sepals obtuse. 78. I. cairica. 



Peduncles filiform, 1-2-flowered. Sepals acute, 



equal; coroUa violet. 79. /. pulchella. 



Sepals unequal, obtuse; corolla white. 80. I. quinque folia. 



Segments of the leaf-blades parted to or but slightly be- 

 yond the middle. 



Corolla rose-purple; plant stout, perennial from a 



tuberous root. 81. I. digitata. 



Corolla yellow, with a purple throat; plant slender, 

 annual. 82. I, fUivo-purpurea. 



> 77. Ipomoea cavanillesii Roem, & Schult. Syst. 4: 214. 1819. — 

 Griseb. Fl. Br. W. Ind. 470. 1861. 



Ipomoea pentaphijlla CsbV.lc. 3: 29. pi. S56. 1794. Not I. pentaphylla J acq. 1788, 

 Convolvulus cavanillesii Spreng. Syst. 4: 590. 1825. 

 Batatas cavanillesii G. Don, Gen. Syst. 4: 262. 1838. 

 Ipomcea bouvetii Duchass. & Walp. in Linnaea 23: 752. 1850. 



Closely resembling /. cairica; sepals ovate or ovate-lanceolate, 6-7 mm. long, 

 coriaceous, glabrous or the outer ones punctate-scabrous; corolla pale rose-colored, 

 white below, about 5 cm. long, the ovate, rounded lobes of the limb crenulate; seeds 

 lanate. 



