224 SCROPHULARIACEAE. 



333. TONELLA. 



Very similar to Collinsia but the cauline leaves mainly ter- 

 nately divided or 3-parted; corolla obscurely 2-lipped, the 5 more 

 or less unequal lobes somewhat rotately spreading, the tube some- 

 what gibbous above; ovules and seeds 1-4 in each cell. 



Tonella floribunda Gray. Stems slender, usually branched, 10-50 cm. 

 high; basal leaves simple, ovate, entire or few-toothed, 5-10 mm. long, slender- 

 petioled; cauline all 3-parted or divided, short-petioled or sessile; divisions 

 oblong, linear or lanceolate, obtuse, short-stalked, 1-3 cm. long, bearing a few 

 short stiff hairs on the back and margin; inflorescence sparsely pubescent with 

 stalked glands; flowers slender- pedicelled, in whorls, from the axils of the 

 reduced upper leaves; calyx-lobes linear; corolla blue, with darker lines within, 

 nearly rotate, 1 cm. broad, the lobes of the lower lip smaller than those of the 

 2-cleft upper lip. A charming little plant, common along streams in Snake 

 River canyon. 



334. GRATIOLA. HEDGE HYSSOP. 



Low mostly perennial branching herbs; leaves opposite, sessile; 

 peduncles axillary, 1-flowered; calyx 5-parted, the narrow divi- 

 sions usually equal ; upper lip of corolla entire or 2-cleft, the lower 

 3-cleft; anther-bearing stamens 2 ; sterile filaments 2, simple and 

 included, or none; style dilated or 2-lipped at the apex; capsule 

 4-valved, many-seeded. 



Viscid puberulent; calyx subtended by a pair of bractlets at 



base. G. virginiana. 



Glabrous; calyx without bractlets. G. ebracteata. 



Gratiola virginiana L. Annual; stems erect, branched below, viscid- 

 puberulent or pubescent above, nearly glabrous at base, 10-30 cm. high; 

 leaves sessile, oblong-lanceolate, acute, entire or toothed, usually narrowed at 

 base, 1-2 cm. long, glabrous or nearly so; pedicels slender, equalling the leaves; 

 calyx enclosed at base by 2 foliaceous bracts which equal the lobes; corolla 

 8-10 mm. long, its yellow tube nearly twice as long as the calyx; lobes whitish, 

 the two upper notched; capsule ovoid. Wet places, common. 



Gratiola ebracteata Benth. Very similar to G. virginiana but glabrous and 

 the calyx bracts wanting; stems usually simple; leaves somewhat longer, 

 lanceolate, mostly entire, tapering from near the base into a long slender apex; 

 capsule subglobose, obscurely 4-angled. In wet places or even in shallow 

 water, base of Cedar Mountain, Idaho; rare in our limits. 



335. SYNTHYRIS. 



Perennial herbs; leaves alternate, crenate, the radical roundish 

 or cordate; flowers small, blue, purplish or green, in a spike or 

 raceme; calyx 4-parted; corolla campanulate, with 4 more or 

 less unequal lobes, or none; stamens 2, from just below the upper 

 sinuses, or in one apetalous species on the hypogynous disk, 

 exserted; stigmas simple; capsule many-seeded. 



Petals blue; flowers in a raceme; leaves orbicular. S. reniformis. 



Petals none; flowers in a reddish spike; leaves ovate. 5. rubra. 



