SCliOl'IILLARIACEyE. (fIGWORT FAMILY.) 291 



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

 small, ovate ami luiitatc ; 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, (l) — Stem 4' - 12' long. 



6. MIMULUS, L. Monkey-flower. 



Calyx tubular, .5-anglo(l, sharply 5-toothcd. Corolla bilabiate; the upper lij) 

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

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

 lieiilally 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; 

 len.ves oblung or Kuueolate, denticulate, cordate and clasping at the base ; pe- 

 duncles longer than the flowers. — Swamps in the u[)pcr districts. Aug. — Stem 

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

 pu!)esccnt. 



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° 

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



7. HERPESTIS, G^rtn. 



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

 bell-shaped, ."j-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-valvcd, many-seeded. — Low 

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

 racemes. 



* Stems 4-an(jled : leaves serrate : peduncles 2-bracted at the base : exterior calyx-lobes 

 diong: corolla white. 



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

 leaves oblung or oblong-oliovate, 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 npper lip rounded. (Gratiola acuminata, Walt.) — Low 

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

 - 1 1° high. Leaves 1 ' - 2' long. 



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

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

 filiform, 3-4 times as long as the loaves. — K^y West. — Stems 6' - 12' long. 

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



