CHELONE SCROPHULARIACE A 509 
PENTSTEMON 
purple flowers in dense terminal and axillary spikes or thyrsoid 
panicles. Calyx 5-parted, bracted at the base, the segments ovate 
or lanceolate. Corolla irregular, the tube elongated, enlarged 
above, the limb bilabiate : upper lip concave, emarginate or entire, 
exterior in the bud: lower lip spreading, 3-lobed. Stamens 5, 
included, 4 of them antheriferous, didynamous, the fifth sterile 
and smaller: filaments slender: anthers cordate, woolly. Style 
filiform: stigma small, capitate. Capsule ovoid, septicidally de- 
hiscent. Seeds numerous, compressed, winged. 
C. nemorosa Dougl. Lindl Bot. Reg. t. 1211. Glabrous except the 
inflorescence which is glandular-pubescent: stems 1-4 feet high, usually 
simple: leaves ovate to lanceolate, 2-4 inches long, irregularly serrate, 
acute or acuminate, often subcordate, on very short petioles: flowers pedi- 
celled, in a loose terminal panicle: bracts and sepals pubescent, lanceolate, 
acuminate, the latter 3-4 lines long: no bractlets under the calyx: corolla 
violet-purple, 12-16 lines long, with wide open mouth, very short 2-cleft 
and not at all fornicate upper lip and 3-lobed spreading lower one, the 
lobes broad and rounded, the ample throat glabrous: antheriferous fila- 
ments glabrous, the sterile one slender-subulate and bearded on the upper 
side near the apex: anthers densely woolly: capsule ovoid, half inch long 
or Lael On rocky banks along mountain streams, Brit. Columbia to 
alifornia. 
8 PENTSTEMON Soland. in Ait. Hort. Kew. iii, 511. (1789.) 
Perennial herbs with opposite leaves and purple, blue white, 
red or yellow flowers in terminal thyrses panicles or racemes. — 
Calyx 5-parted, the segments imbricated. Corolla irregular, with 
ample throat, not gibbous anteriorly, and bilabiate limb: the 
upper lip 2-lobed ; the lower one 3-lobed. Stamens 5, not exsert- 
ed, 4 of them antheriferous and didynamous, the other sterile and 
as long as or shorter than the others. Anther-cells either united 
or confluent at the apex. Style filiform, with small entire stigma. 
Seeds numerous, angled but not winged. | 
§ 1 Eupentstemon Gray Proc. Am. Acad. vi, 57. Anther- 
cells soon divaricate or divergent, united and often confluent at 
the apex, dehiscent for nearly or quite their whole length. 
* Low and suffruticose with coriaceous leaves: anthers’ densely 
woolly with long soft hairs, at length peltately explanate. 
P. Lewisii Benth. in DC. Prodr. x, 321. (1846.) P. Menziesii Gray 
in part, Gerardia fruticosa Pursh. Fl. 423 (1814.) Glabrous or more or 
less cinereous: a tufted shrub 1-2 feet high with lateral leafy branches, the 
central ones bearing peduncled racemes: leaves thick, ovate or obovate to 
oblong, 6-12 lines long, serrate, the lower short-petioled: inflorescence ra- 
cemes; the peduncles almost all 1-flowered: sepals lanceolate, often acu- 
minate: corolla lilac-purple, an inch or more long, tubular-funnelform and 
moderately bilabiate: stamens rather deeply included: sterile filament 
long and glabrous. Arid mountain tops, eastern. Washington to Brit. 
Columbia and Montana. 
P. Menziesii Hook. Fl. ii, 98. Glabrous or more or less pubescent: 
a low densely matted prostrate shrub with lateral leafy branches, part of 
which bear erect flowering shoots 2-6 inches high: leaves thick, 3-10 lines 
