of the Galapagos Archipelago. 231 
Wholly distinct from any known congener, though allied to a Guayaquil 
species, S. purpurea, L. 
XANTHOXYLE.E. 
226. XANTHOXYLUM PrEROTA, H. B. K. DeC. Prodr. vol.i. p. 725. 
Hab. James Island, Charles Darwin, Esg. West India Islands. 
The specimens are in bud only and very imperfect; unarmed, as are some 
of X. pterota in Hook. Herb. 
: ZYGOPHYLLEX. 
227. TRIBULUS cistoweEs, L. DeC. Prodr. vol. i. p. 703. 
Hab. Albemarle and James Islands, Charles Darwin, Esq. & Mr. Macrae. Tropical 
America. 
No fruit, and therefore incapable of satisfactory determination. 
SAPINDACEE. 
228. CARDIOSPERMUM MOLLE, H. B. K. DeC. Prodr. vol. i. p. 601. 
Hab. Chatham Island, Charles Darwin, Esq. Tropical America. 
ByTTNERIACES. 
229. WaLTHERIA RETICULATA, Hook. fil.; ramulis divaricatis pubescentibus, 
foliis cordato-ovatis acutis infrà precipue reticulatim venosis margini- 
bus crenato-dentatis crispatis utrinque appressé velutinis tomentosis, 
floribus in axillis foliorum 3-5 subfasciculatis breviter pedicellatis, calyce 
oblongo obtuse 5-dentato, petalis spathulatis calyce 4 longioribus. 
Hab. Chatham, James and Albemarle Islands, Charles Darwin, Esq., Mr. Macrae & 
Mr. Douglas. 
Rami cortice fusco tecti, crassitie penne anatina. Petioli 4-5 lin. longi. Folia 3-1 unc. 
longa, interdum lineari-oblonga, semper venis subtüs prominulis reticulata. Flores 
parvi Calyx 2 lin. longus. Habitus Melochie tomentose, L. 
MaLvACEX. 
230. MALACHRA CAPITATA, L. DeC. Prodr. vol. i. p. 440. 
Hab. James Island, Charles Darwin, Esq. Very common in the West Indies. 
231. Gossypium purpurascens, Poir. (an G. Barbadense, Willd. ?) 
Hab. Chatham and James Islands, Charles Darwin, Esq. 
