A 
1280 
PENTSTEMON* pruinósum. 
Blue-leaved Pentstemon. 
DIDYNAMIA ANGIOSPERMIA. 
Nat. ord. SCROPHULARINEE. 
PENTSTEMON.— Suprà, vol. 13. fol. 1121. 
P. pruinosum ; foliis ceesiis, radicalibus petiolatis integris dentatisve, caulinis 
dentatis sessilibus, bracteis superioribus integris, floribus verticillatis, 
calycibus bracteisque villosis, corollis glabris calycibus dupló longioribus; 
limbi laciniis rotundatis integris. 
P. pruinosum. Douglas in herb. Hort. Soc. 
Perennis 3- 14-pedalis, undique pruiná cesid irrorata. Folia radicalia 
cespitosa, pubescentia, rigida, nunc, presertim in cultis, integerrima, nunc 
dentata. Verticillastra 7-8-flora. Flores cyane:. 
This rivals the fine P. speciosum in the brilliancy of its 
colouring, and exceeds it in the neatness of its appearance. 
It was found by Mr. Douglas near the Priest's rapid of the 
Columbia, and by him sent to the Horticultural Society, in 
whose Garden our drawing was made in July last. 
It is perfectly hardy, and perennial; but, like many of 
the newly-introduced species of this genus, is apt to exhaust 
itself so much in flowering as to become little better than 
a biennial. This may, however, be prevented by pinching 
a part of the flowering stems of each plant, upon their first 
appearance, — a practice which may be advantageously 
adopted with regard to all plants having similar habits. 
It should be cultivated in a shady place, in some light 
soil, in which it will flower beautifully during all June, 
July, and August, ripening seeds in tolerable abundance. 
J.L. 
* See fol. 1245. 
