128 FAM. 158. 



deeply 5-parted; corolla bilabiate, personate; stamens 4, included. 



In sand. Spring and Summer. - Linaria, Toad-flax 



L. Canadensis. Smooth, erect, slender, sometimes branched at the base; leaves 

 linear; racemes usually several-flowered; corolla small, light-blue or white. 



L. Floridana. Stem sparingly glandular-pubescent, simple or branched above 

 and at the base; the lower leaves oblong, those on the stem linear; racemes 

 loosely flowered; corolla blue; spur subulate. 



3. Stamens 2, exserted; corolla rotate; — flowers solitary in the axils, 

 or in racemes or panicles; calyx 4-5 parted; corolla 4-5 lobed. 

 In cultivated ground. Spring and Summer. - - Veronica, Speedwell 



V. arvensis. Finely pubescent; leaves ovate; corolla pale blue. 



V. peregrina. Smooth or glandular; leaves fleshy, oblanceolate, corolla white. 



3. Stamens 2, included, with or without staminodia; corolla bilabiate, 4 



3. Stamens 4, with or without a staminodium, ----- 7 



4. Calyx of 4 partially united sepals; corolla nearly regular; — small 



herbs with creeping stems and sessile, suborbicular leaves; flow- 

 ers small, solitary in the axils; corolla obscurely 2-lipped; sta- 

 mens 2. _________ Micranthemum 



M. orbiculatum. Stems tufted; corolla white or purplish. Muddy soil. Sum- 

 mer. 



4. Calyx of 5 nearly distinct sepals, -___-___5 



5. Filaments elongated, slender; — herbs with mostly sessile leaves; flowers 



solitary in the axils on slender peduncles; corolla 2-lipped; sta- 

 mens 2, staminodia 2. _ _ _ Ilysanthes, False Pimpernel 

 I. refracta. Stems erect, tufted, wiry; leaves basal, spatulate; sepals linear; 

 corolla pale blue or purplish. Damp ground. Summer. 



5. Filaments short and stout, or almost wanting, - 6 



6. Connective of the anthers dilated, cells transverse; — flowers soli- 



tary on axillary peduncles; calyx 5-parted, with 2 bractlets; rather 

 succulent herbs, smooth or softly pubescent, - Gratiola, Hedge-hyssop 



G. Virginiana. Pubescent above; peduncles about as long as the bracts; cor- 

 olla with yellowish tube and whitish lobes. Muddy banks. Early Sum- 

 mer. 



G. sphaerocarpa. Glabrous; peduncles rarely one-half of the bracts; corolla 

 white. Low ground. Summer. 



G. ramosa. Slightly pubescent, viscid; peduncles as long as the bracts or longer; 

 corolla whitish. Wet soil. Summer. 



6. Connective of the anthers not dilated, cells vertical; — flowers soli- 



tary, sessile or short -peduncled in the axils; calyx 5-parted with 

 2 bractlets; rigid herbs, rough-pubescent. Spring to Fall. 



Sophronanthe (Gratiola) 



S. hispida (G. subulata). Hispid, usually clustered; leaves linear; corolla sal- 

 verform, about twice as long as the calyx, white or purplish. Low pine- 

 barrens. 



S. (G.) pilosa. Hirsute, simple or sparingly branched; leaves ovate to oblong; 

 corolla tubular, scarcely longer than the calyx, white. Low ground. 



7. Sterile stamen as long as the others, and more or less bearded; — flow- 



ers in terminal racemes or panicles; calyx 5-parted; corolla 2- 



lipped, _______ Pentstemon, Beard-tongue 



P. multiflorus. Lower leaves spatulate or oblong, upper leaves few, oblong- 





