226 SCROPHULARIACEAE. 



Veronica humifusa Dickson. Perennial, glabrous or puberulent; stems 

 erect or decumbent, 10-15 cm. high; leaves opposite, oval, ovate or orbicular, 

 crenate-dentate or subentire, short-petioled, about 1 cm. long; racemes ter- 

 minal; bracts oblong, alternate; pedicels erect, equalling or exceeding the 

 calyx; corolla blue, dark-striped, 4 mm. broad; capsule orbicular, notched at 

 apex, as long as the calyx. Moist places, rather common. 



Veronica scutellata L. Perennial, glabrous or nearly so, rooting at the 

 lower joints; stems 15-30 cm. high; leaves all sessile, lanceolate or nearly 

 linear, mostly denticulate or entire, attenuate-acute, 3-5 cm. long; racemes 

 axillary from alternate axils, slender, few-flowered, as long as or exceeding the 

 leaves; pedicels slender, spreading; corolla blue, 4-5 mm. broad; capsule 

 notched both at apex and base. Wet places, not common. 



Veronica americana Schwein. Perennial, glabrous throughout, rooting at 

 the lower nodes; stems decumbent, usually branched, 30-60 cm. long; leaves 

 all opposite, oblong, ovate or lanceolate, obtuse, serrate, rounded at the base, 

 short-petioled; racemes opposite, in the upper axils, exceeding the leaves; 

 pedicels spreading, longer than the bracts and flowers; flowers blue with darker 

 stripes, 4 mm. broad; capsule with a shallow notch at the apex, 4-5 mm. broad. 

 Wet places, infrequent. 



337. 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 fila- 

 ments unequally 2-forked, exserted; stigma 2-lobed; capsule 

 many-seeded. 



Hysanthes 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. Sandy banks of streams, 

 rare. 



339 LIMOSELLA. Mudwort. 



Very small glabrous annual herbs, stoloniferous, rooting and 

 creeping in the mud; leaves narrow, entire, fleshy, in dense 

 clusters around the simple 1-flowered naked peduncles; flowers 

 small; calyx campanulate, 5-toothed; corolla rotate-campanu- 

 late, 5-cleft, nearly regular; stamens 4, all anther-bearing; style 

 short; stigma thickish; capsule many-seeded. 



Limosella aquatica L. Tufted; leaves spatulate, obtuse, 2-5 cm. long, 

 the blade usually much shorter than the petiole; peduncles shorter than the 

 leaves; corolla white or pinkish, 2 mm. broad, hardly longer than the calyx; 

 capsules globose, obtuse, 2-2.5 mm. long. Muddy places, near Moscow, 

 Idaho, Henderson. 



340. MIMULUS. Monkey Flower. 



Herbs with mostly simple opposite leaves; flowers axillary, on 

 simple peduncles; calyx prismatic, or rarely campanulate, usually 



