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PENTSTEMOM SCROPHULARIACEZ 517 
CHIONOPHILA 
sterile filament glabrous. In open places in the Siskiyou Mountains of 
Oregon and California. 
P. heterophyllus Lindl. Bot. Reg. t. 1899. Glabrous or pruinose- 
puberulent, scarcely glaucous: stems 1-2 feet high from a woody base, slen- 
der, often diffusely branched: leaves lanceolate or linear or only the lowest 
oblong-lanceolate, mostly narrowed at base, 1-4 inches long: corolla an inch 
or sometimes more long, with narrow tube rose-purple or pink, sometimes 
changing to violet, sterile filament glabrous. On rocky tops of the Siskiyou 
Mountains in Oregon to Nevada. 
9 CHIONOPHILA Benth. in DC. Prodr. x, 351. 
Dwarf perennial herbs with thickish opposite leaves and tubular 
flowers in simple spikes or racemes. Calyx funnelform, thin-me- — 
branaceous, becoming scarious, merely and ohtusely 5-loted. Co- 
rolla tubular, with slightly dilated throat and bilabiate limb: up- 
per lip erect and slightly concave, barely 2-lobed, the sides some- 
what recurved ; lower with convex densely bearded base forming 
a palate, and 3-lobed, the short lobes, recurving. Antheriferous 
stamens 4, didynamous: anther-cells divaricate andconfluent. Ste- 
rile filament small and short or even minute, naked. Style filiform : 
_ stigma minute entire. Capsule oblong enclosed in the marcescent 
calyx and corolla, loculicidally 2-valved the valves soon 2-parted: 
placental dissepiment flat. Seeds rather large, with avery loose 
and arilliform cellular-reticulated outer coat. 
C. Tweedyi Henderson Bull. Torr. Club xxvii, 352. Dwarf peren- 
nial: glabrous ornearly so: leaves thickish, entire, mostly in a radical tuftt 
spatulate or lanceolate, tapering below into a scarious-margined base: those 
of the 1-3 inches high flowering stems 1 or 2 pairs, or sometimes alternate, 
linear: flowers in a few-flowered raceme: calyx short and deeply lobed: 
corolla saccate at base dorsally, the lower lip strongly papillate. In the 
Mountains of Idaho and adjacent Washington. 
Tribe 4 Gratiolex Benth. in DC. Prodr. x, 189. Leaves oppo- 
site or verticillate only the upper ones alternate. Inflorescence simple 
and centripetal: the peduncles solitary in the axils of bracts or leaves 
and ebracteolate. Corolla from bilabiate to almost regular, not saccate 
or otherwise produced at base. Antheriferous stamens 2 or 4 no rudi- 
ments of the fifth. 
10 DIPLACUS Nutt. in Taylor’s Ann. Nat. Hist. i, 137. 
Shrubs with opposite leaves and large yellow red or orange ax- 
illary flowers on solitary peduncles. Calyx tubular, 5-angled or 
5-toothed, persistent. Corolla tubular, bilabiate, the upper lip 2- 
lobed, the lower 3-lobed, the lobes emarginate or variously toothed 
orcleft. Fertile stamens 4. Style slender with bilamellate stigma. 
Capsule. linear-oblong, closely invested by the calyx and wholly 
inclosed in it; firm-coriaceous, with a woody tubercular enlarg- 
ment at the apex, incompletely dehiscent, opening by the upper 
suture only, from the base to near the apex, the valves spreading 
into a boat-shaped open pod. Placente distinct, borne on the 
middle of the valves. Seeds small, very numerous. 
