314 House: North American Convolvulaceae 



Thvella tamnifolia (L.) Raf. Fl. Tellur. 4 : 84. 1836 



Ipomoca tamnifolia L. Sp. PL 161. 1753. 

 Convolvulus tamnifolius Ell. Sk. I : 258. 1 81 7. 

 Jacquemontia tamnifolia Griseb. Fl. Br. W. Ind. 474- 1861. 



South Carolina to Arkansas, Florida, Louisiana, and through- 

 out tropical America. 



Thyella pycnocephala (Benth.) 



Jacquemontia pycnocephala Benth. Bot. Voy. Sulphur 137. 1845. 



Southern Mexico and Central America. 



/' 



Thyella lactescens (Seem.) 



1854. 



Panama. 



Jacquemontia simulata sp. nov. 



Perennial ; stems twining, somewhat woody, smooth, the 

 branches short, tomentose when young ; leaf-blades narrowly 

 ovate or oblong-ovate, rounded or subcordate at the base in the 

 larger leaves, acute, 1.5-4 cm. long, densely velvety -pubes- 

 cent on both surfaces, petioles shorter than the blades, 5-10 mm. 

 long ; pedicels sessile, 3-6 mm. long, the flowers not surpassing- 

 the leaves ; sepals orbicular or obovate, rounded at the apex, 

 1.5-2 mm. long, subequal, tomentose ; corolla 8-10 mm. long, 

 blue, glabrous, the margin slightly 5 -angled, and fully 10 mm. 

 broad. 



Thyella eriocephala (Moric.) 



Ipomoea eriocephala Moric. PI. Nouv. Am. 43. pi. 2Q. 1838. 

 Jacquemontia eriocephala Meissn. /. c. 303. 



Thyella maynensis (Meissn.) 



Jacquemontia eriocephala maynensis Meissn. /. c. 303. 



Thyella montana (Moric.) 

 Ipomoea montana Moric. PI. Nouv. Am. 44. //. 30. 1838. 

 Jacquemontia montana Meissn. in Mart. Fl. Bras. 7 : 304. 1869. 



Thyella rufa-velutina (Meissn.) 



Jacquemontia rufo-velutina Meissn. /. c. 305. 



Thyella serrata (Choisy) 



Ipomoea serrata Choisy, Conv. Rar. 135. 1837.— In DC. Prodr. 9 : 364. 1845 

 Jacquemontia serrata Meissn. in Mart. Fl. Bras. 7 : 30^. 1869. 



Thyella sphaerocephala (Meissn.) 



Jacquemontia sphaerocephala Meissn. /. c. 306. 



