o/" Arachis and Voandzeia. 161 



Sixteen species of this genus have been lately characterized, and the new 

 ones described, by Dr. Vogel {Linnœa, v. xii. p. 63). He divides the genus into 

 two sections according to the presence and absence of the stipiform rudiment 

 of a flower in the same axilla as the perfect one. This character appears 

 constant in most instances, although in S.viscosa, Sw. (of which S. glut'inosa 

 and S. humilis of Kunth are probably mere varieties) I have observed some- 

 times two perfect flowers, sometimes a perfect one and a small stipiform rudi- 

 ment with four bracteoloe, sometimes only the perfect flower with two, three, 

 or four bracteolse. Amongst the very few new species I sliould have to atld 

 to those of Vogel, there is nothing remarkable enough to make it worth while 

 describing them on tiiis occasion. 



The genus f'oandzeia remains confined to tlie single /'. suhterranea, Dup. 

 Th. 



Since tlie above has been in the press, I have received the second part of 

 Torrey and Gray's Flora of North America, in which is described a curious 

 new genus under the name of Chapmannia, closely allied to Sti/losfuithes in 

 structure, but with the habit f>i some species of ^srlii/noi?iene and Adesmia. 

 As I am indebted to the kindness of the authors for specimens containing 

 flowers in both states, I subjoin a full character drawn up in conformity witli 

 those I have above given of Arachis and Sfi/losant/ies, adding a description of 

 the fruit from a letter recently addressed by Dr. Torrey to Dr. Gray. 



Chapmannia. Torr. et Gray. 



Flores polygami. F/oris hermapltroditi stcpissime sterUis ; calyx tubo filifornii, 

 limbo breviter 5-fido, lacinia infima parum majore. Corolla fauci calycis 

 inserta. ï'exillum suborbiculare. .^te obovatee, carina breviores. Carina 

 incurva, apice bifida, vcxillo subœqnilonga. Stamina monadelpha, alterna 

 longiora. Antherœ consimiles oblongœ. Ovarium subsessile, glabrum, 

 2 — 3-ovulatum. Stylus filiformis, glaber, obtusus, longe exsertus. Stigma 

 minutuin (v. capitatum?). Floris fœminei fertilis ; calyx, corolla, et sta- 

 mina nulla. Ovarium subsessile, erectum, liirsutum, 2 — 3-ovulatum. 



