56 PROCEEDINGS OF THE AMERICAN ACADEMY 



plants of the collection. So that the detailed character of the genus 

 may be completed as follows : — 



Drupa ovata, subacuminata (ultra-semipollicaris), sarcocarpio tenui, 

 putamine osseo ruguloso. Seminis testa raembranacea: albumen 

 carnosum copiosum, per cotyledones tenui-foliaceas orbiculares fere 

 bipartitum : radicula supera cylindrica quam cotyledones dimidio bre- 

 viore. 



3. Synopsis of the Genus Pentstemon. By Asa Gray. 



PENTSTEMON, Mitchell, L'Her. 



Sect. 1. EUPENTSTEMON. {Pentstemonum sect. 1-4, Benth. 

 in DC.) Antherarum loculi per anthesin divaricati seu diver- 

 gentes, usque (in P. baccharifolio vix) ad basin dehiscentes, api- 

 cibus pi. m. coadunatis. 



§ 1. (Euianthera, Benth.) Fruticuli vel sufFrutices ramosissimi, 

 foliis crasso-coriaceis parvulis. Inflorescentia stricte racemosa, 

 nempe pedunculis fere semper unifloris. Corolla violacea seu 

 purpurea, speciosa, leviter bilabiata, fauce ampliata. Antherae 

 lana louga densa prjeditss ! loculis usque ad summum apicem 

 hiantibus, effoetaj peltatim explanatse. Am. Bor.-Occidentales. 



1. P. Menziesii, Hook. British Columbia to the Rocky Moun- 

 tains, and those of California. — On comparison of all the specimens 

 within reach, I confidently conclude that all the genuine members of 

 this section (for P. frutescens, Lamb, cannot be of the group) are 

 forms of one species, — for which P. Menziesii is the most appropriate 

 name. P. Scouleri, Lindl. is the earliest published name under this 

 genus ; but that belongs to a form with narrowest leaves and sepals, 

 which other botanists may keep distinct, — until they learn how small 

 reliance can be placed upon the particular shape of the divisions of the 

 calyx in this genus. The sterile filament varies from rather strongly 

 bearded to almost naked. The forms which have been indicated as 

 species are : — 



a. Lewisii. {P. Menziesii, Plook. P. Lewisii, Benth. in DC. 

 Gerardia fruiicosa, Pursh.) Folia elliptica basi attenuata, seu obo- 

 vato-oblonga, serrato-dentata : calycis segmenta lanceolata vel ex ova- 

 to lanceolato-acurainata. — Hartweg's no. 1878 and Bourgeau's from 

 the Rocky Mountains have the broadest sepals, which are also glandu- 

 lar-pubescent. 



