1121 
PENTSTEMON Richardsonii. 93 
Dr. Richardson's Pentstemon. 
ere Te 
DIDYNAMIA ANGIOSPERMIA. 
Nat. ord. ScRopHULARINE. § ds 
PENTSTEMON Mitch. Calyx pentaphyllus, aut quinquepartitus, 
bractea solitaria distante. Corolla ventricosa bilabiata. Stamina didynama 
rudimento quinti filiformi seepiis barbato, Anthere sejunctee sepids glabra. 
Capsula ovata bilocularis, bivalvis, polysperma. Semina angulata. Herbe v.’ 
suffrutices, Americane et Orientali-Asiatice.. Folia levia acuminata sepiis 
serrata. Flores paniculato-racemost purpuret rosei albidive. 
P. Richardsonii ; caule herbaceo, foliis sessilibus pinnatifidis, calycibus 
glanduloso-pubescentibus : laciniis ovatis acutis, corolle labio superiore 
bilobo, inferiore trilobo transyerso, pedunculis racemosis 2-3 floris. 
P. Richardsonii. Douglas Journal, &c. ined. 
Caulis erectus, sesquipedalis, parm ramosus, teres, minutissime, pu- 
bescens. Folia ovata, acuminata, pinnatifida, 24 uncias longa, laciniis. 
incisis, supra sub lente minuttssime pubescentia, subtds pallidiora, omnind 
glabra. Flores axillares, paniculati, paniculis strictis, paucifloris. Pedicelli 
glandulosi. Calyx pentaphyllus, foliolis oblongo-lanceolatis, subpubescentibus. 
Corolla purpurea, ventricosa, extis ferd omnind glabra, bilabiata, labio supe- 
riore erecto, bilobo, inferiore trilobo, levissime piloso. Filamenta superiora basi. 
incrassata. Antheree glabre, hippocrepice, resupinate, valvis versis apicem 
ciliatis. Rudimentum jiliforme, staminibus longior, apice pilis paucissimis 
barbatum. 
One of several new species found by Mr. Douglas in 
the north-western territories of North America, growing 
on bare dry rocks, in the vicinity of the Columbia and its 
branches. 
Mr. Douglas has named it in compliment to Dr. 
Richardson, the celebrated companion of Captain Franklin 
in the late overland expeditions to the shores of the Polar 
Sea, undertaken by order of the British Government. 
This is a handsome hardy perennial, growing freely in 
peat among American plants, and flowering towards the 
