204 FOUNDATIONS OF BOTANY 



usually with small teeth. Flower-cluster narrow. Corolla dingy 

 violet, purplish, or whitish, the tube not much widened aV)ove, its 

 throat nearly closed by a hairy palate. Sterile filament much 

 bearded. Dry hillsides or stony ground. 



2. P. laevigatus, Solander. 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 clasping base. Flower-cluster broader than in Xo. 1. 

 Corolla white or oftener purplish, suddenly widened above, the throat 

 not closed. Sterile filament slightly bearded toward the top. In 

 rich soil. 



3. P. barbatus, Nutt. 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, -Qsually with 2 braetlets at the base. Corolla some- 

 what 2-lipped. Perfect stamens 2. Stigma enlarged or 

 2-lipped. Pod 4-valved, many-seeded. 



1. G. virginiana, L. Stem cylindrical, 4-10 in. long, branching 

 from the base. Leaves |-lj in. long, varying from lance-oblong to 

 spatulate. Corolla pale yellow, tinged with red. Common in muddy 

 soil, along brooksides, etc. 



VU VERONICA, Tourn. 



Herbs or shrubs. Low^er leaves or all the leaves opposite, 

 rarely whorled. Flowers in axillary or terminal racemes, 

 rarely solitary. Calyx usually 4-parted. Corolla wheel- 

 shaped or somewhat bell-shaped; liinb usually 4-cleft, spread- 

 ing, the side lobes commonly narrower. Stamens 2, inserted 

 on the corolla-tube at the sides of the upper lobe, projecting. 

 Stigma somewhat knobbed. Capsule generally flattened, often 

 notched at the apex, 2-celled, few-many-seeded. 



1. V. americana, Schweinitz. Brooklime. A perennial smooth 

 herb, somewhat prostrate below, but the upper parts of the stem 

 erect, 8-15 in. high. Leaves 1-2 in. long, lance-ovate or oblong, 



