Tas. 4464. 
PENTSTEMON cyaNnanTHUs. 
Azure-flowered Penstemon. 
Nat. Ord. ScROPHULARINEA—DIDYNAMIA ANGIOSPERMIA. 
Gen. Char. (Vide supra, Tas. 4319.) 
PENTSTEMON cyananthus; elatus glaucescenti-viridis, foliis integerrimis inferioribus 
oblongo-spathulatis petiolatis acuminatis, caulinis sessilibus cordato-ovatis 
_ tenui-acuminatis floralibus inferioribus late cordatis acuminatissimis, pedun- 
culis axillaribus pseudo-verticillatis multifloris spicam foliosam interruptam 
spectabilem formantibus, sepalis angustis lanceolato-subulatis, corolla pul- 
cherrime azureee (tubo purpureo) superne ampliato, limbi bilabiati lobis 
subsequalibus, antheris filamentoque sterili hirsutis. 
A more beautiful Pentstemon even than that we have figured 
at Tab. 4319, having equally handsome flowers, and these much 
more numerous and more compact, forming a spike (as m a 
specimen now before us) more than a foot long, and with much 
finer foliage. It is, too, an inhabitant of the same country, 
the upper valleys of the Platte River in the Rocky Mountains, 
where seeds were collected by Mr. Burke. These seeds were 
reared by Messrs. Lucombe, Pince, and Co., in whose Exeter 
Nursery the plants flowered beautifully, in the open air, in May 
1849. The species is doubtless quite hardy, and a great acqui- 
sition to our flower-borders. A bed filled with this species 
would have a splendid effect. It may rank near P. acuminatum, 
Dougl. (in Bot. Reg. t. 1285), but is quite different, and in- 
finitely more beautiful. ; 
Descr. Perennial. Stems herbaceous, erect, terete, simple in 
our specimen. Leaves all entire, inclining to glaucous-green. 
Root-leaves petiolate, spathulate, acuminate.  Stem-leaves the 
broadest and largest of the genus, cordato-ovate, or cordate, 
sessile, acuminate: those of the inferior pseudo-whorls broadly 
cordate and very acuminate : uppermost ones of all reduced to 
subulate bracteas. Peduncles opposite, axillary in all the upper 
floral and bracteal leaves, bearing cymes of many flowers, which 
form pseudo-whorls around the stem. Calyx of five subulate 
SEPTEMBER Ist, 1849. K 2 
