718 SCROPHULARIACEAE (fIGWORT FAMILY) 



Tribe III. CHEL5nEAE. Corolla tubular or 2-lipped, neither spurred nor saccate below. Capsule 

 2-4-yalved. Leaves opposite. Inflorescence usually compound, of small axillary spiked or 

 racemed or umbel-like' clusters or cymes, or when reduced to a single flower the peduncle mostly 

 2-bracteate. Stamens 4, and usually a rudiment of the fifth. 



4. Collinsia. Corolla 2-cleft, the short tube saccate on the upper side ; the middle lobe of tha 



lower lip sac-like and inclosing the declined stamens. 



5. Scrophularia. Corolla inflated, globular or subcylindric, with four erect lobes and one 



spreading one. Eudiment of the sterile stamen a scale on the upper lip. 



6. Pentstemon. Corolla tubular. Sterile stamen about as long as the rest. Seeds wingless or 



but narrowly margined. 



7. Chelone. Corolla tubular, inflated above. Sterile stamen shorter than the others. Anthers 



very woolly. Seeds winged. 



8. Paulownia. Tree. Corolla tubular, inflated above, the lobes spreading. Sterile stameiL 



none. 



Tribe IV. GRATldLEAE. Corolla tubular, not saccate nor spurred. Capsule 2-valved. riower& 

 solitary in the axils of bracts or leaves ; peduncles naked (or 2-bracteolate in no. 15). Leaves 

 all or the lower ones opposite. No trace of a fifth stamen. 



* Stamens 4, all anther-bearing and similar. 



9. Mimulus. Calyx prismatic, 5-angled, 5-toothed, Corolla elongated. 



10. Conobea. Calyx 5-parted, the divisions equal. Corolla short. 



11. Bacopa. Calyx 5-parted, unequal, the upper division largest. Corolla short. 



12. Limosella. Calyx 5-toothed. Corolla open-bell-shaped, 5-cleft, nearly regular. Leaves 



alternate or fascicled, fleshy. Dwarf aquatic or marsh plant. 



* * Anther-bearing stamens 2 ; usually also a pair of sterile filaments. 



13. Micranthemum. Flowers minute. Calyx 4-toothed or cleft. Upper lip of corolla short or 



none. Filaments with an appendage ; sterile pair none. Dwarf aquatic. 



14. Ilysanthes. Calyx 5-parted. Stamens included, the sterile filaments protruded. 



15. Gratiola. Calyx 5-parted. Stamens included, the sterile pair short or none. 



Subfamily II. KHINANTHOtDEAE 



Under lip of the lateral lobes of the corolla covering the upper in the bud. 

 Capsule commonly loculicidal. 



Tribe V. DIGITAlEAE. Corolla wheel-shaped, salver-shaped, or bell-shaped. Stamens 2 or 4, not 

 approaching in pairs nor strongly didynamous ; anthers 2-celled. 



IG. Digitalis. Calyx 5-parted. Corolla tubular or elongate-bell-shaped, declined. Stamens 4. 



17. Veronica. Calyx 4(rarely 3-5)-parted. Corolla wheel-shaped or salver-shaped, almost regu- 

 lar. Stamens 2. Leaves chiefly opposite or whorled. Plowers racemed or axillary. 



IS. Synthyris. Calyx 4-parted. Corolla bell-shaped, 2-4-lobed, irregular. Stamens 2 or 4. 

 Leaves alternate. Flowers racemed or spiked. 



Tribe VI. GERARDiEAE. Corolla with a spreading and slightly unequal 5-lobed limb. Stamens 

 4, approximate in pairs. Leaves opposite, or the uppermost alternate. 

 * Corolla bell-shaped to funnel-form ; anthers 2-celled. 



19. Seymeria. Stamens nearly equal. Tube of the corolla broad, not longer than the lobes. 



20. Gerardia. Stamens strongly unequal, included. 



* * Corolla salver-shaped ; anthers l-celled ; flowers in a spike, 



21. Buchnera. Calyx tubular, 5-toothed. Limb of the elongated corolla 5-cleft. 



Tribe VII. EUPHRASlEAE. Corolla tubular, obviously 2-lipped ; the upper lip narrow, erect or 

 arched, inclosing the 4 usually strongly didynamous stamens. 



* Anther-cells unequal and separated ; capsule many-seeded. 



22. Castilleja. Calyx tubular, cleft down the lower, and often also on the upper, side. 



Upper lip of corolla elongated ; the lower short, often very small. 



23. Orthocarpus. Calyx tubular-campanulate, 4 cleft. Upper lip of corolla little longer and 



usually much narrower than the inflated lower one. 



