718 SCKOPHULARIACEAE (FIGWORT FAMILY) 



Tribe III. CHEL6NEAE. Corolla tubular or 2-lipped, neither spurred nor saccate below. Capsule 



2 4-valved. Leaves opposite. Inflorescence usually compound, of small axillary spiked <>r 



racemed or utnbel-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 the 



lower lip sac-like and inclosing the declined stamens. 

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



spreading orie. Rudiment of the sterile stamen a scale on the upper lip. 



0. 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 stamen 



none. 



Tribe IV. GRATl6l/EAE. Corolla tubular, not saccate nor spurred. Capsule 2-valved. Flowers 

 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. RHINANTHOtDEAE 



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. 



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

 IT. Veronica. Calyx 4(rarely 8-5)-parted. Corolla wheel-shaped or salver-shaped, almost regu- 

 lar. Stamens 2. Leaves chiefly opposite or whorled. Flowers 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. GERARDlEAE 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. 



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

 -'<>. Gerardia. Stamens strongly unequal, included. 



* * Corolla salver-shaped ; anthers 1-celled ; flowers in a spike. 



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



Tribe VII. EUPHRASiEAE. Corolla tubular, obviously 2-lipped ; the upper lip narrow, erector 

 arched, inclosinir the I usually strongly didynamous stamen-. 



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



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



T'ppcr lip of corolla elongated ; the lower short, often very small. 



JH. Orthocarpus. Calyx tnhular-eampamilate, 4 cleft. Upper lip of corolla little longer and 

 usually much narrower than the inflated lower one. 



