1245 
PENTSTEMON* triphyllum. 
Three-leaved Pentstemon. 
DIDYNAMIA ANGIOSPERMIA. 
Nat. ord. SCROPHULARINER. 
PENTSTEMON. — Supra, vol. 13. fol. 1121. 
P. triphyllum ; herbaceum, humile, foliis ternis quaternisve glabris incisis : 
inferioribus oblongis, floralibus integerrimis, pedunculis bi-trifloris calyci- 
busque arachnoideis, corollee laciniis oblongis obtusis: labii inferioris 
zequalibus. ` 
P. triphyllum. Douglas. 
Caulis teres, ramosus, pedalis - sesquipedalisve, coloratus. Folia 3-4- 
natim verticillata, obtusè incisa, inferiora oblonga, superiora lanceolata, 
suprema (floralia) lineari-lanceolata, integerrima. Flores parcè paniculati, 
pedunculis 2-3-floris, arachnoideis. Calycis lacinie ovate, acute, arach- 
noidee. Corolla subventricosa, pallidè rosea, venosa, labio superiore emar- 
ginato: laciniis obtusis ; inferiore trilobo, laciniis oblongis, obtusis, equalibus. 
Filamenta superiora basi dilatata ; rudimentum filiforme, barbatum. Antheree 
albe, glabre. — Douglas. 
According to Mr. Douglas, by whom this was detected, 
it is a common plant, on decomposed dry granite, or schist 
rocks, on the Blue Mountains of North-west America, in 
the district watered by the river Columbia; it is also 
found on the mountains to the southward in Northern 
California. It was introduced by the Horticultural Society 
in 1827, and flowered in August 1828, when our drawing 
was made. 
The verticillate disposition of the leaves is not repre- 
sented in our plate, in which the upper part of a very 
vigorous plant is shewn. They are characteristic of the 
* So called from x6&rs, five, and erie, a stamen, in allusion to the 
presence of a fifth stamen; an unusual occurrence in the order to which 
this genus belongs. 
