12 PLANT-^ FRiMONTIAX^E. I. 



collateral and erect ovules, which ai'ise from the base of the cell : style as long 

 as the stamens, nearly straight, and with a longitudinal stigmatose fissure or groove 

 on the inside (as in Ccrcocarpus). Achcnium oblong, compressed, almost wholly 

 enclosed in the persistent and membranaceous calyx, apiculate with the base of 

 the style. The seed is erect, with amygdaloid cotyledons, and a short inferior 

 radicle. 



The foliage of this plant is so different from that of most other Rosacese, that 

 it was at first sight taken for a Mimosa or Acacia. It clearly belongs to the sub- 

 tribe Cercocarpese, Torr. Sf Gr.,* although it differs in its valvate calyx. The 

 aestivation of Cercocarpus is difficult to determine, as the calyx is open in the very 

 young flower-bud, and the teeth are very short ; it seems, however, to be imbri- 

 cated. The characters of the subtribe Eudryadese must be altered, for the calyx 

 in Cowania (described by Don, Endlicher, and Zuccarini as valvate) is certainly 

 imbricate in. all the species. Dr. Englemann noticed this character in his genus 

 Greggiaf (which is Cowania plicata, Don, and C. purpurea, Zucc.)-]^ There will be 

 nothing therefore to distinguish the subtribes, as they now stand, but the number 

 of ovaries in the flower, which being a character of no great importance, they 

 may be united ; and then Cowania will stand next to Purshia, to which it is very 

 nearly allied in habit. 



CARPENTERIA, Nov. Gen. 



Calycis tubo late hemisphserico, basi ovarii adnato ; limbo 5-6-(rarius 7-) par- 

 tito, laciniis valvatis persistentibus. Petala 5-G, orbiculari-obovata, sestivatione 

 convoluta. Stamina numerosa : filamenta filiformia. Styli in unicum coadunati, 

 brevi : stigmata 5-7, lineari-oblonga, distincta. Capsula (nisi basi) libera, 5-7, 

 locularis, loculicide dehiscens : placentae subglobosse, intra loculos projectse, poly- 

 sperma). Semina divergentia, oblonga ; testa utrinque laxa, reticulata, ad hilum 

 crenata. — Frutex Californicus ; foliis oppositis integerrimis ; floribus magnis, albis, 

 in cymis racemosi^ simplicibus terminalibus dispositis. 



CARPENTERIA CALIFORNICA. Tab. VII. 



Hab. — Sierra Nevada of California, probably on the head waters of the San 

 Joachin. 



A shrub, with upright dichotomous branches, and a loose grayish bark, which 



* Flora of Nortli America, 1. p. 426. 



t Bot. Append, to Wislizenus's Tour in Northern Mexico, p. 114. 



I A rcraarknble new species of Cowania, with entire hnear leaves (C. eriea^foh'a, 2Wr.), has very 

 recently been found on tlie Rio Grande, by Dr. Parry of the Mexican Boundary Commission. It will be 

 described in the appendix to the second part of Dr. Gray's Plantse Wrightianw, now in press, and soon to 

 be published. 



