of the Galapagos Archipelago. 193 
the stems and branches (circumstances perhaps attributable to age), the sca- 
rious nature of the bracteas, and a more intimate cohesion between the seg- 
ments of the perianth than I can well imagine to exist in the former, together 
with the development of broad wings in that organ. May they not be two 
sexes of a dicecious plant? 
96. CnvProcanPus PYRIFORMIS, H. B. K. 
Hab. Chatham Island, Charles Darwin, Esq. It is also found on the continent of South 
America. 
In these specimens the filaments are united into the base, and placed on 
one side of the ovary, which is oblique, with a penicillate stigma, arising from 
the side opposite the phalanx of stamens. 
PHyTOLACCEJE. 
97. PHYTOLACCA DECANDRA, L. 
Hab. James Island, Charles Darwin, Esg. An abundant South American plant. 
98. BoussINGAULTIA BASELLOIDES, H. B. K. 
Hab. Charles Island, Charles Darwin, Esq. Also a widely-diffused American plant. 
NycTaGINE&. 
99. BOERHAAVIA HIRSUTA, L. 
Hab. Albemarle Island, Mr. Macrae. 
100. B. DECUMBENS, L. ? 
Hab. James Island, Charles Darwin, Esq. 
Specimens very imperfect. 
101. B. erecta, L. 
Hab. Albemarle Island, Mr. Macrae. 
102. B. scANDENS, L. 
Hab. James and Charles Islands, Charles Darwin, Esq. This and the three former are 
all common tropical plants. 
103. PrsowiA FLORIBUNDA, Hook. fil.; arborea, ramis nudis teretibus, foliis 
sparsis petiolatis ovato-oblongis obtusis integerrimis utrinque sed subtüs 
