SCROPHULARIACEiE. 261 LINDERNIA. 



10. GRATIO'LA. 

 Calyx deeply 5-parted, mostly with 2 bracts at base ; corolla 

 subbilabiate, upper lip emarginate, lower 31obed ; stamens 2 

 fertile, mostly with 3 sterile filaments; capsule 2-celled. 



Lat. o-m^ia, favor ; alluding to its medicinal virtues. Herbs with opposite ^ 

 leaves. Peduncles axillary, solitary, 1-flowered. 



1. G. AUREA. 



Smooth ; haves oblong-lanceolate, subentiie, half-clasping ; sterile f laments 



2, minute. A small, perennial herb, G — 8 inches high, frequenting the borders 

 of muddy ponds and other moist places. Stem declining and rooting at the 

 base, quadrangular, simple or branching. Leaves opposite, sessile, a little 

 clasping, smooth, punctate, acute or nearly so, often with a few teeth near 

 the end. Flowers yellow, axillary, alternate, on slender stalks, as long as the 

 leaves. Filaments 4, adhering to the corolla, 2 of them minute, without 

 anthers. Aug. Per. Hedge Hyssop. 



2. G. Virgi'nica. 



Stem pubescent ; leaves lanceolate, subacute ; sterile filaments none. In wet 

 places. Stem 4 — 8 inches high, more or less pubescent, round, declining and 

 l)ranching at base. Leaves one to two inches long, and one third as wide, 

 smooth, lanceolate, sessile, dentate or nearly entire near the ends, subconnate 

 or amplexicaul. Corolla white or pale-yellow, pubescent within, twice as 

 long as the calyx, and on long, pubescent stalks. Calyx with 5 equal seg- 

 ments, and 2 bracts which are linear-lanceoUte and rather longer than the 

 sepals. July. Per. Creeping Hijssop. 



11. LINDE'RNIA. 

 Calyx deeply 5-parted, naked at base ; corolla bilabiate, 

 ringent, upper lip short, reflexed, lower lip 3-cleft, unequal, 

 carinate ; stamens 4, the 2 longer ones forked and sterile ; an- 

 thers cohering ; capsule 2-celled, 2-valved. 



Name in honor of Von Lindern, a physician and botanist of Strasburg. 

 Herbs with opposite leaves. Peduncles axillary, solitary, 1-flowered. Dis- 

 sepiment of the capsule parallel with the valves. 



1. L. DILATA'TA. Muh. L. pyxidaria. P. 

 Leaves dilated at base, scarcely toothed, clasping; peduncles alternate, 



lono-er than the leaves ; corolla twice as long as the calyx. A small aquatic 

 herb, flowering in August, in ponds and wet meadows. Stem smooth, 6 

 inches high, square, brittle and occasionally branched. Leaves small, slightly 

 and remotely toothed. Flowers pale blue, upper ones sometimes opposite. 

 July. Aug. Ann. Lindern Pimpernel. 



2. L. attenua'ta. 



Leaves obovale-lanceolate, tapering at base ; peduncles shorter than the 

 leaves. A plant about the size of the last, and found in similar situations. 

 Stem erect or procumbent, smooth, thickened, quadrangular, with opposite, 

 spathulate leaves. Flowers blue, on stalks nearly or quite as long as the 

 leaves. Aug. Ann. False Hedge Hyssop. 



3. L. MONTl'COLA. 



Stem slender, dichotomous; radical leaves spathulate, cauline ones few, 

 linear, small and remote ; peduncles very long, at length deflected. White 



