256 PHANEROGAMOUS PLANTS. 



mens in several series ; the column one third shorter than the petals 

 Carpels about 11 : styles united below, distinct above, glabrous and 

 capitellate. Ovaries with 3 ovules. This species seems to have been 

 entirely overlooked thus far. We have it in no other collections 

 than those of the United States Exploring Expedition. 



4. SIDA, Linn. 



1. Sida hederacea, Torr. in PL Fendl. 



Hab. Plains of the Sacramento River, and around the Bay of San 

 Francisco, California; common. 



5. HIBISCUS, Linn. 



1. Hibiscus Moscheutos, Linn. 



Var. occidentalis : foliis cordatis obtuse serratis subtus cano-tomentosis 

 supra pallide viridibus pilis simplicibus pubescentibus ; involucello 

 calyce longiore. 



Hab. Marshes on the Lower Sacramento, California; not else- 

 where. — The eastern plant differs in the pubescence of under side of 

 the leaves being much whiter, shorter, and more velvety, and that of 

 the upper side only of sparse, extremely minute stellate hairs ; the 

 base of the leaves, too, is obtuse, but rarely cordate ; and the invo- 

 lucre is no longer than the calyx. It seems to be distinct from both 

 H. incanus and H. grandiflorus. We believe this species has not 

 been noticed before as occurring west of the Rocky Mountains. 



