FIGWORT FAMILY 219 
IV. PENTSTEMON Mitchell 
Perennials, the stems branching from the base, unbranched 
above. Leaves opposite. Flowers usually showy, in a ter- 
minal panicle. Calyx of 5 nearly distinct sepals. Corolla 
tubular, the tube wide above and narrowed below; 2-lipped. 
Stamens 4 (2 long and 2 short), with a fifth antherless fila- 
ment as long as the others, its upper half bearded. Capsule 
ovoid, acute. 
1. P. hirsutus Willd. Stem somewhat sticky-downy, 1-2 ft. high. 
Leaves varying from oblong to lanceolate, 2-4 in. long, usually with 
small teeth. Flower cluster narrow. Corolla dingy violet, purplish, 
or whitish; the tube not much widened above, its throat nearly closed 
by a hairy palate. Sterile filament much bearded. Dry hillsides or 
stony ground. 
2. P. gracilis Nutt. SLenpER BrarptonGue. Stem 6-18 in. 
high, smooth below but the flower cluster covered with glandular, 
sticky hairs. Basal leaves spatulate or oblong; stem leaves most of 
them linear-lanceolate. Corolla purple or whitish, 3-1 in. long, the 
tube enlarged above and its throat entirely open. Sterile filament 
bearded above along half its length. On moist prairies W. 
3. P. levigatus Ait. Stem usually smooth except the flower cluster, 
2-4 ft. high. Leaves shining, those of the stem ovate-lanceolate or 
broadly lanceolate, 2—5 in. long, with a somewhat heart-shaped, clasp- 
ing base. Flower cluster broader than in No. 1. Corolla white or 
oftener purplish, suddenly widened above, the throat not closed. 
Sterile filament slightly bearded toward the top. In rich soil. 
4. P. Digitalis Nutt. Much resembling No. 3, but taller, sometimes 
5 ft. high. Corolla white, the tube abruptly widened. In fields and 
thickets; sometimes cultivated. 
5. P. barbatus Roth. Stems slender and rod-like, 3-4 ft. high. 
Leaves lanceolate, entire. Flower cluster long and loosely flowered. 
Flowers showy, drooping. Corolla tube slender, scarlet, somewhat 
bearded in the throat. Sterile filament beardless. Cultivated from 
Mexico. 
V. GRATIOLA L. 
Low herbs, growing in wet or damp ground. Leaves oppo- 
site, sessile. Flowers axillary and solitary, peduncled. Calyx 
5-parted, usually with 2 bractlets at the base. Corolla some- 
what 2-lipped. Perfect stamens 2. Stigma enlarged or 2-lipped. 
Pod 4-valved, many-seeded. 
