396 PHANEROGAMOUS PLANTS. 



The larger variety is a much stouter plant, the branches being from 

 a foot to eighteen inches long, and the leaves more than an inch in 

 length. The cymes are compound, and 12-40-flowered, with a pair 

 of leaves at the base of the lower branches. According to Mr. Brack- 

 enridge the flowers are scarlet and very showy. 



7. Pentstemon triphyllus, Dougl. 



Pentstemon triphyllus, Dougl. in Bot. Reg. t. 1245; Hook. PI. Bor.-Am. 2, p. 96; 

 Benth. in DC. Prodr. 10, p. 329. 



Hab. On the Walla- Walla River, Oregon ; the only region where 

 this rare species has hitherto been found. 



8. Pentstemon Richardsoni, Dougl. 



Pentstemon Richardsoni, Dougl. in Lindl. Bot. Reg. t. 1121 ; Hook. Bot. Mag. t. 

 3391, & Fl. Bor.-Am. 2, p. 96; Benth. in DC. Prodr. 10, p. 330. 



Hab. On the Walla- Walla River, Oregon. 



9. Pentstemon venustus, Dougl. 



Pentstemon venustus, Dougl. in Lindl. Bot. Reg. t. 1309 ; Hook. Fl. Bor.-Ara. 2, 

 p. 95 ; Benth. in DC. Prodr. 10, p. 330. 



Hab. On the Walla-Walla and Kooskooskee Rivers. — In the speci- 

 mens from the latter station the filaments are all smooth, but in other 

 respects there is little difference. 



10. Pentstemon diffusus, Dougl. 



Pentstemon diffusus, Dougl. in Bot. Reg. t. 1132, & t. 3645 ; Hook. Fl. Bor.-Ain. 

 p. 95 ; Benth. in DC. Prodr. 10, p. 330. 



Hab. East of the Cascade Mountains in Washington Territory. — 

 Our plant differs from the description of this species by Bentham, in 

 the anthers being hispid at the summit ; but we find the same char- 

 acter in a cultivated but authentic specimen of P. diffusus. 



