260 BHINANTHACEAE. 



mm. long: corolla violet, 4.5-5.5 cm. long, pubescent; lobes rounded: capsules 

 ovoid, 3-4 cm. long, acute : seeds winged. Occasional, in thickets and on 

 roadsides. Nat. of As. Early sum. KARRI. 



8. MIMULUS L. Annual or perennial, erect herbs. Leaf-blades shal- 

 lowly toothed. Flowers axillary. Calyx nearly regular: lobes much shorter 

 than the tube. Corolla 2-lipped: upper lip 2-lobed, erect or spreading: lower 

 lip 3-lobed, spreading. Stamens 4: filaments about equally adnate to the 

 corolla. Staminodium wanting. Capsule included in the calyx. Sum. and 

 fall. MONKEY-FLOWER. 



Calyx with minute lobes and broad truncate sinuses : leaf-blades petioled. 



1. M. alatus. 

 Calyx with lanceolate lobes %-% as long as the tube and acute 



sinuses : leaf-blades sessile. 2. M. ringens. 



1. M. alatus Soland. Stems 2-10 dm. tall, square or 4- winged: leaf -blades 

 elliptic to elliptic-lanceolate, 5-15 cm. long: pedicels 4-winged: calyx 12-15 

 mm. long, scarcely distended by the capsule: corolla 20-25 mm. long; middle 

 lobe of the lower lip oval. Common, in swamps. 



2. M. ringens L. Stems 3-13 dm. tall, flattened: leaf -blades lanceolate or 

 narrowly elliptic, 5-20 cm. long: pedicels 2-winged: calyx 15-20 mm. long, 

 manifestly distended by the capsule: corolla 25-30 mm. long; middle lobe of 

 the lower lip orbicular or renif orm-orbicular. Common, in swamps. 



9. GRATIOLA L. Annual or perennial, rather succulent herbs. Leaf- 

 blades entire or shallowly toothed. Flowers axillary. Calyx-lobes 5, often 

 unequal, sometimes toothed, glabrous or minutely pubescent. Corolla 2-lipped. 

 Stamens 2. Staminodia mostly scale-like, or wanting. Capsule globular to 

 broadly ovoid. 



1. G. virginiana L. Stem viscid-puberulent, or pubescent above, 1-3 dm. tall: 

 leaf-blades elliptic- spatulate to elliptic or oblong, 1.5-5 cm. long, undulate or 

 shallowly toothed, often acute : calyx-lobes linear to linear-lanceolate, 4-4.5 mm. 

 long: corolla 8-11 mm. long; tube yellowish; lips whitish, the lower one 

 deeply notched : capsules acute. Common, in mud or sand. Sum. HEDGE- 

 HYSSOP. 



10. ILYSANTHES Eaf. Annual or biennial, diffuse herbs. Leaf-blades 

 entire or shallowly toothed. Flowers axillary. Calyx-lobes 5, narrow, entire. 

 Corolla 2-lipped, mainly blue: upper lip erect: lower lip spreading. Stamens 



2. Staminodia elongate, glandular, except the small lobe near the apex. Cap- 

 sules oblong to narrowly ovoid. Sum. FALSE-PIMPERNEL. 



Sepals as long as the capsule or Ibnger : pedicels shorter than the subtending bracts. 



1. I. attenuata. 



Sepals shorter than the capsule : pedicels longer than the subtend- 

 ing bracts. 2. I. dubia. 



1. I. attenuata (Muhl.) Small. Stem 1-5 dm. tall, often much-branched: 

 leaf-blades oblong to ovate, or oblanceolate to obovate below, 1-3 cm. long, 

 shallowly serrate : calyx-lobes 4-5 mm. long, mostly ciliolate : corolla 8-10 mm. 

 long: capsules 3.5-4.5 mm. long. Lower Susquehanna valley. Occasional, 

 on shores and low islands. Schists. 



2. I. dubia (L.) Barnhart. Stems 1-2 dm. tall, often much-branched: leaf- 

 blades obovate to oblong, or ovate above, 0.6-2 cm. long, entire or nearly so: 

 calyx-lobes 3-4 mm. long, mostly eciliate : corolla 5-7 mm. long : capsules 4-5 

 mm. long. Common, in mud and low grassy places. 



