64 TRANSACTIONS AND PROCEEDINGS OF THE [Se.ss. lviii. 



brevioribus ; corolla infundibuliformi, glabra ; capsula 

 globosa, glabra, calycem dimidio superante ; seminibus 

 (immaturis) glabris. 



Hab. — Eio Pilcomayo, Kerr, 12 ! 



Petioli |-2i poll, longi. Lamina f— 2 poll, longa |-2 

 poll. lata. Peduncnli |-2 poll, longi. Pedicelli i— f 

 poll, longi. Sepala exteriora 2 lin. longa, interiora 2^ lin. 

 loDga, 2 lin. lata. Corolla 9—10 lin. longa. 



Allied to /. umbellata, Meyer, but the cymes have fewer 

 flowers, the calyx is smaller, and the leaves are different in 

 form. 



The collection contains another species of Ipomcea allied 

 to this one, but with larger flowers and differently shaped 

 leaves. The material, however, is insufficient for a 

 description (X. E. Brown). 



Ipomcea yillicalyx, X. E. Br. (n. sp.). — Caule volubili, 

 cum petiolis pedunculisque dense villoso-tomentoso ; foliis 

 cordatis, apice acuminatis, acutis vel obtusis, mucronulatis, 

 utrinque molliter adpresseque tomentosis vel subvillosis ; 

 pedunculis quam petiolis longioribus, dichotomis, cymoso 

 3-9 floris ; pedicellis calyce lequantibus, villosis ; sepalis 

 oblongis obtusis, subcoriaceis, pilis longis dense villosis ; 

 corolla infundibuliformi roseo-purpurea, extus adpresse 

 villosa ; staminibus inclusis, filamentis basi dense barbatis ; 

 ovario glabro. 



Hab. — Argentine Eepublic, Gran Chaco, Gibert, 67 ! 

 Rio Pilcomayo, Kerr ! 



Petioli i-li poll, longi. Folia li-4 poll, longa, 

 li-2f poll. lata. Pedunculi 1^-2 poll, longi. Pedicelli 

 4-G lin. longi. Sepala 5 lin longa, 2h-o lin. lata. 

 Corolla 1| poll, longa, circa 2 poll. diam. 



A very distinct species, easily recognised by its tomentose 

 surface and shaggy calyx ; the branches of the cyme are 

 very short, being only from 1-3 lines long (X. E. Brown). 



Ipomcea platensis, Ker. 

 Hab. — Pcio Pilcomayo. 



Ipomcea tuberculata, Roem. et Schultes. 



Hab. — Rios Parana, Paraguay, and Pilcomayo. 



