Tab 4319 
PENTSTEMON Gordoni. 
Mr. Gordons Pentstemon. 
Nat. Ord. ScuophularinejE.—Dibynamia Angiospermia. 
Gen. Char. Cal. 6-partitus. Cor. ventricoso-tubulosa, limbi labio superiore 
nunc basi concavo apice bilobo, nunc usque ad basin bipartite, rarius elongate 
emarginato ; inferiore patente trifido basi intus barbate v. nude. Stamina fer- 
tilia basi declinata, apice adscendentia j anthera varise. Stamen quinti lilamenti 
sterile subulatum, apice saepe dilatatum barbatum v. nudum, cseteris sequilongura 
vel vix dimidio brevius. Stylus apice capitato-stigmatosus. Capsula septicide 
bivalvis, valvulis integris bitidisve. Semina numerosa, imniarginata, nunc ovoideo- 
triquetra incurva, nunc apice truncata angulis acutis.—Herbae Americce borealis, 
basi perennes v. fruticosee, ramosee, ramis jloriferis seepins erectis simplicihus, rarius 
diffusis rainosis. Folia opposita, radicalia et infima petiolata, gradatim in floralia 
amplexicaulia decrescentia. Pedunculi dichototne plurifiori ad ramijicationes 
bracteati, in paniculam sen thyrsum terminal&ni basi seepius foliatum dispositi, 
rarius unijlori sub flore oppositi bibracteotati et articidati in racemum simplicem 
dispositi. Corollse speciosre, nibrre violacece cterulece alhidee v. rarius ochroleucre. 
Benth. 
Pentstemon Gordoni ; elatus, viridis, foliis radicalibus oblongo-spathulatis pe- 
tiolatis, caulinis lato-lanceolatis sessilibus subamplexicaulibus integerrimis, 
pedunculis plurifloris axillaribus paniculam spicatam foliosam formantibus, 
sepalis par\ds ovatis apiculatis imbricatis margine membranaceis, corollai 
caeruleae tube supeme ampliato, limbi bilabiati lobis inaequalibus, antheris 
lilamentoque sterili hirsutis. 
For the opportunity of figuring this charming species of 
Pentstemon I am indebted to Edward Leeds, Esq., of Manchester, 
who raised it from seeds given him by Mr. Shepherd of the 
Botanic Gardens, Liverpool, and which had been collected by 
Mr. Gordon in the valley of the Platte River, on the east side of 
the Rocky Mountains. I possess native specimens from the 
same traveller, gathered in the same locality, and also from 
Mr. Geyer, collected in the Upper Platte ”, on slate hills near 
the junction of the Horse and Laramie Rivers. In many respects 
it approaches the Pentstemon s^eciosus, an inhabitant exclusively 
of the Oregon territory, west of the Rocky Mountains; but that 
has much narrower leaves, a less leafy panicle, deeper coloured 
flowers, a larger calyx, and, above all, the anthers and sterile 
august 1st, 1847. 
