SCUOl'UULARIACE^. (fIGAYOKT FAMILY.) 291 



4. L. Elatine, Miller. Ihiiry; 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 

 pm-plish ; calyx-lobes lanceolate, acute. — AVaste places, North Carolina. Nat- 

 uralized. ® — Stem 4' - 12' long. 



6. MIMULUS, L. MOXKEY-FLOWLK. 



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

 2-lobed, erect or reflexed ; the lower 3-lobed, spreading. Stamens 4, didj'na- 

 mous : anther-cells somewliat confluent. Stigma ovate, 2-lip])cd. 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-anglcd, the angles wingless; 

 lef.ves oblong or lanceolate, denticulate, cordate ami 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 sliortcr than 

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

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



7. HERPESTIS, Gcertn. 



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

 bcU-siiaped, .5-lobed or bilabiate, with the upper lip 2-lobed or eniarginate, the 

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

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

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

 racemes. 



* Stems 4-an(jlcd: leaves sen-ate : peduncles 2-hracfcd at the base : exterior calyx-lobes 

 oblong: corolla white. 



1. H. nigrescens, Bcnth. 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° 

 - \^° high. Leaves 1' - 2' long. 



2. H. peduncularis, Bcnth. Smooth ; stem decumbent, diflfuse, 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. 



