SCROPHULARINE.E. 269 



4. PETUNIA, Jussieu. Viscid-pubescent herbs, with lateral rather 

 than terminal flowers. Calyx 5-parted, the divisions foliaceous. Capsule 

 2-valved; valves entire. 



1. P. purviflora, Juss. Small rather fleshy prostrate annual, freely 

 branching, with narrow-spatulate in. long leaves nearly sessile: fl. 

 short- peduncled, 4 lines long: corolla purple, with a yellowish tube, its 

 short retuse lobes slightly unequal : capsule ovoid. Low moist lands at 

 Alameda, thence eastward and southward. 



ORDER LXXVI. SCROPHULARINE/E. 



Herbs or shrubs with a watery juice, not rarely a heavy narcotic odor. 

 Leaves prevailingly opposite, though of ten alternate exstipulate. Flowers 

 complete, mostly very irregular; the corolla usually bilabiate, imbricate 

 in bud. Stamens mostly 2 or 4, with a rudimentary fifth. Style 1, 

 undivided; stigma not rarely 2-lobed. Ovary 2-celled, the placentae 

 firmly united in the axis (except in Diplacus). Seeds oo , small, often 

 angular, occasionally winged. 



* Corolla nearly rotate; the tube very short. 



Coarse tall herbs with yellow flowers VERBASCUM 1 



Low herbs with bluish or white flowers VERONICA 10 



* * Corolla bilabiate, personate. 

 Capsule opening by pores; 



Corolla spurred at base LlNABlA 2 



" saccate at base ATTTIRRHINUM 3 



* * * Corolla bilabiate, neither personate nor galeate. 



Corolla gibbous or saccate at base on the upper side, with dilated 



tube and spreading lobes COLLINSIA 4 



Corolla-tube ventricose; lobes very short SCROPHULARIA 5 



Corolla various; sterile filament representing the fifth stamen 



prominent PENTSTEMON 6 



Calyx prismatic, 5-angled; 



Shrubs; mature placentae parting DIPLACUS 7 



Annuals; capsule thickish, dehiscent on one side only EUNANUS 8 



Herbs; capsule thin, dehiscent by both sutures... MIMULUS 9 



Calyx tubular or campanulate, not angled; 



5-sulnate; capsule dehiscent at apex and down one side MIMETANTHE 10 



'Sepals distinct, unequal; corolla campanulate, scarcely 



irregular HERPESTIS 11 



Calyx 5-parted; perfect stamens 2; 



Corolla-lobes of nearly equal length GRATIOLA 12 



Upper lip of corolla smaller, erect and concave ILYSANTHKS 13 



* * * * Corolla scarcely bilabiate. 



Calyx and corolla both almost campanulate PLANTAGINELLA 14 



Corolla nearly rotate, 4-lobed; 



Leaves cauline and opposite VERONICA 10 



Leaves in a radical tuft WULFENIA 16 



