44 TKANSACTIONS AND PROCEEDINGS OF THE [Sess. lviii. 



Of the other plants which have flowered may be noted : 

 Begonia incariiata. Link and Otto, — from Mexico ; the 

 tropical African Dracena fragrans, Ker-Gawl, and the 

 East Indian D. angustifolia, Eoxb. ; Kennedya j^^ostrata, 

 R. Br,, var. Marryattce, the finest variety of this 

 Australian climber ; Aloe ciliaris, Haw., from South 

 Africa ; Rhipsalis rliombea, Pfeiff, and E. salicornoides, 

 Haw., two Brazilian plants ; and Erythroxylon Coca, 

 Lamk., from Peru. 



The Botany of the Pilcomayo Expedition ; being a 

 List of Plants collected during the Argentine 

 Expedition of 1890-91 to the Eio Pilcomayo. The 

 Identifications and the Description of New Species by Mr. 

 N. E. Brown, Assistant in the Herbarium, Royal Gardens, 

 Kew. By J. Graham Kerr, Naturalist to the Expedition. 



(Read April 1893.) 



The following is a list of a small collection of plants, 

 with description of their species, brought by me from 

 Fortin Page — the farthest point reached by the un- 

 fortunate Argentine Expedition of 1890-91 to the Rio 

 Pilcomayo, in the Gran Chaco of South America. For 

 particulars of the expedition, and of the region of whose 

 flora these plants form a part, I would refer to the 

 preliminary notice published in Trans. Bot. Soc. vol. xix. 

 page 128, and will here only premise a few words in the 

 nature of an introduction. The specimens contained in 

 this list were collected within a few miles radius of 

 Fortin Page, situated on the banks of the River Pilcomayo, 

 some 300 miles from its mouth measured along its very 

 tortuous course. 



Though few in actual number of species, the list will 

 be found to give a tolerably characteristic idea of the 

 phanerogamic flora of the more central and low-lying parts 

 of the Gran Chaco, a region consisting of wide-spreading 

 palm-dotted llanos, varied here and there by patches of 

 hardwood forest, or wide-spreading swamp. This low- 

 lying part of the Chaco is subject to wide-spreading 

 inundations, daring which enormous areas remain under 



