320 SCROPHULARIACEAE. 



leaves; calyx-lobes lanceolate, acute, longer than the tube, not equalling the 

 corolla; corolla violet or blue, 6-7 mm. long, 2-lipped for half its length. 

 Common on banks and in open prairies. 



Collinsia grandiflora Dougl. Very similar to C. tenella but larger, 15-30 

 cm. high; leaves larger, the cauline in whorls of 3-7; calyx-lobes triangular- 

 subulate, very acute, longer than the tube; corolla blue-violet, 8-16 mm. long. 



In open prairies, especially southward. 



Collinsia grandiflora pusilla Gray. Plants 5-15 cm. high; pedicels erect 

 in fruit; corolla 8-10 mm. long. 



Perhaps only a starved form of C. grandiflora. Washington to California. 



448. 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 collinsioides Nutt. Stems weak and slender, branched from the 

 base; lower leaves ovate or roundish, entire or 3-lobed or sometimes parted, 

 slender-petioled ; upper sessile, mostly 3-parted, the lobes or divisions oblong 

 or lanceolate; corolla blue. 



Southern Washington to California. First collected by Nuttall near the 

 mouth of the Willamette River. 



449. ILYSANTHES. FALSE PIMPERNEL. 



Small and smooth annual herbs; leaves opposite, sessile; 

 peduncles axillary, 1-flowered, the upper becoming racemose; 

 calyx becoming 5-parted, the divisions becoming narrow and 

 nearly equal; upper lip of corolla short, erect, 2-lobed, the lower 

 larger, spreading, 3-cleft; anther-bearing stamens 2; sterile filam- 

 ents unequally 2-forked, exserted; stigma 2-lobed ; capsule many- 

 seeded. 



Ilysanthes dubia (L.) Barnhart. Glabrous, simple or branched from the 

 base, 5-12 cm. high; leaves sessile, ovate, acute or with a few teeth, 1-2 cm. 

 long, the upper ones reduced; pedicels slender, twice as long as the leaves, 

 spreading in fruit; flowers 6-8 mm. long; calyx-lobes linear, as long as the 

 purple corolla; capsule ovoid-oblong, 4-6 mm. long. 



Banks of streams and ponds, rare. 



450. 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. 



Herbage viscid-pubcrulent; calyx subtended by a pair of 



bractlets at the base. C. virginiana. 



Herbage glabrous; calyx without bractlets. C. ebracteata. 



