SCROPHULARIACEJE. (FIG WORT FAMILY.) 291 



4. L. Elatine, Miller. Hairy ; stem prostrate, slender, branching ; leaves 

 small, ovate and hastate ; the lowest sometimes opposite and toothed ; pedicels 

 axillary, filiform, commonly longer than the leaves ; flowers small, yellow and 

 purplish ; calyx-lobes lanceolate, acute. Waste places, North Carolina. Nat- 

 uralized. @ Stem 4' - 12' long. 



6. MIMULUS, L. MONKEY-FLOWER. 



Calyx tubular, 5-angled, sharply 5-toothed. Corolla bilabiate ; the upper lip 

 2-lobed, erect or reflexcd ; the lower 3-lobed, spreading. Stamens 4, didyna- 

 mous : anther-cells somewhat confluent. Stigma ovate, 2-lipped. Capsule locu- 

 licidally 2-valved, many-seeded. Erect smooth perennial herbs, with opposite 

 leaves, and axillary purple flowers. 



1. M. ringens, L. Stem compressed, 4-angled, the angles wingless; 

 leaves oblong or lanceolate, denticulate, cordate and clasping at the base ; pe- 

 duncles longer than the flowers. Swamps in the upper districts. Aug. Stem 

 1 - 2 high. Leaves thin, 2' - 4' long. Corolla showy, the palate greenish and 

 pubescent. 



2. M. alatus, Ait. Stem square, with winged angles ; leaves oblong-ovate, 

 acuminate, serrate, tapering at the base into a petiole ; peduncles shorter than 

 the flowers. Swamps, Florida, and northward. July and Aug. Stem 2 

 high. Leaves 2'- 5' long. Calyx-teeth small. 



7. HERPESTIS, Gsertn. 



Calyx 5-parted ; the 3 outer lobes, especially the upper one, broader. Corolla 

 bell-shaped, 5-lobed or bilabiate, with the upper lip 2-lobed or emarginate, the 

 lower 3-lobed. Stamens 4, didynamous : anther-cells contiguous or divaricate. 

 Style dilated and flattened at the apex. Capsule 2-valved, many-seeded. Low 

 herbs, with opposite leaves. Flowers opposite, axillary, or in leafy terminal 

 racemes. 



* /Stems 4-angled : leaves serrate : peduncles 2-bracted at the base : exterior calyx-lobes 



oMong: corolla white. 



1. H. nigrescens, Benth. Smooth; stem erect, simple or branched; 

 leaves oblong or oblong-obovate, rather obtuse, serrate above the middle ; lower 

 peduncles as long as the leaves, the upper much longer ; tube of the corolla 

 striped with blue ; the upper lip rounded. (Gratiola acuminata, Walt.) Low 

 ground, Florida to North Carolina, and westward. Aug. and Sept. Stem 1 



- l high. Leaves 1' - 2' long. 



2. H. peduncularis, Benth. Smooth; stem decumbent, diffuse, creep- 

 ing near the base ; leaves small, obovate-oblong, entire near the base ; peduncles 

 filiform, 3-4 times as long as the leaves. Key West. Stems 6' - 12' long. 

 Leaves 4" - 6" long. Flowers smaller than in No. 1. 



