12 plants vb&moetuuur. i. 



collateral and erect ovules, which arise 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 Cercocarpus). Achenium 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 Rosacea?, that 

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

 tribe Cercocarpeae, Torr. $ 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 Eudryadeae 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 

 Greggiat (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 5-6, orbiculari-obovata, a?stivatione 

 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 subglobosae, intra loculos projects, poly- 

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

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

 in cymis racemosis simplicibus terminalibus dispositis. 



CARPENTERIA CALIFORNIA. 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 North America, 1. p. 426. 



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



X A remarkable new species of Cowania, with entire linear leaves (C. ericafolia, Torr), has very 

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

 descnbed in the appendix to the second part of Dr. Gray's Plant* Wrightiana?, now in press, and soon to 



