SCROPHULARIACE^. 247 



* Calyx prismatic and barely 5-toothed, or rarely campanulate and hardly 5-cleft : corolla 

 more or less bilabiate : stamens 4. 



13. MIMULUS. Corolla with either elongated or short tube; upper lip 2- and the lower 

 3-h)bed or parted; the former often erect and the sides turned back; a pair of palatine 

 ridges (either bearded or naked and more or less intruded) ruiming down the lower 

 side of the throat. Stamens inserted low within the tliroat or on the tube. Antliers 

 generally approximate in pairs, on filiform filaments ; their cells divergent, either distinct 

 or confluent at the apex. Style filiform : stigma bilamellar, or sometimes peltate by the 

 union of the two dilated lijis, or rarely even funnelform. Capsule enclosed in tlie 

 calyx, loculicidal; the placentae either firmly united, or in one section barely contiguous 

 in the axis. 



* * Calyx 5-parted: corolla more or less bilabiate: stamens 4, inserted below the throat, 

 included : anther-cells distinct. 



•i— Sepals narrow and nearly alike : capsule septicidal or septif ragal. 



14. STEMODIA. Corolla with cylindraceous tube, somewhat erect and hardly 2-lobed 

 upper lip, and more spreading lower one. Anther-cells separate and stipitate. Stigma 

 2-lobed. Capsule with valves soon 2-parted :. placentaj left in tlie axis. 



15. CONOBEA. Corolla nearly of the preceding, or more equally 5-lobed. Anther-cells 

 distinct but not stipitate, parallel. Stigma bilamellar. Capsule sei)tifragal ; valves en- 

 tire or rarely 2-cleft. Seeds striate. 



-1— -i— Sepals unequal and imbricated ; the posterior one considerably or much broader than 

 tlie anterior ; the two lateral interior and usually much narrower: capsule septicidal or 

 loculicidal; the valves entire or 2-parted, separating from the undivided placentiferous 

 column. 



16. HERPESTIS. Corolla with short cyhndraceous tube, and spreading lips; upper 

 emarginate or 2-lobed ; lower 3-lobed, plane. Anther-cells parallel or divergent. Cap- 

 sule globose or ovate. 



* * * Calyx 5-parted or deeply 4-5-lobed : antheriferous stamens only 2, 

 -1— The posterior pair ; the anterior pair sterile rudiments or sometimes wanting: flowers 

 not minute : corolla manifestly bilabiate ; upper lip entire or 2-lobed ; lower 3-cleft : 

 sei)als narrow, little unequal : stigma dilated and mostly bilamellar. 



17. GRATIOLA. Corolla with cylindraceous tiibe and lips nearly of equal length. Sta- 

 mens both fertile (with anther-cells distinct) and sterile inserted below the throat and in- 

 cluded. Capsule both loculicidal and septicidal ; valves separating from the placentif- 

 erous column. Seeds striate and transversely reticulated. 



18. ILYSANTHES. Corolla with c^^lindraceous tube, or more dilated throat; upper lip 

 erect and concave, 2-lobed ; lower larger, spreading, with 3 broad nearly equal lobes. 

 Fertile stamens iuserted ratlier low down and somewhat included: sterile filaments 

 inserted at the orifice and forked ; one fork glandular and obtuse ; the other smooth and 

 naked, acute, sometimes reduced to a mere tooth, sometimes more elongated antl even 

 bearing the rudiment of an antlier. Capsule ovoid or oblong, septicidal or septifragal; 

 the valves entire, at length separating from the placentiferous column. Seeds foveolate- 

 rugose. 



•J— The anterior pair of stamens antheriferous, at least only a single pair antheriferous, 

 and no rudiments of sterile ones ; flowers minute : corolla only 4-lobed : anthers short, of 

 roundisli distinct cells. 



1 9. MICRANTHEMUM. Calyx usually 4-cleft or 4-lobed. Corolla with very short tube, 

 obscurely bilabiate; its upper lip short or almost none; the lower 3-lobed and the middle 

 lobe longer. Stamens inserted in the throat : filaments short, dilated or appendaged at 

 base. Style short : stigma dilated or 2-lobed. Capsule globular, thin, becoming 1-celled 

 by the vanishing of the partition, leaving the several-many-seeded placenta in the axis. 

 Seeds oblong, minute. 



20. AMPHIANTHUS. Calyx 5-parted, unequal. Corolla funnelform, with spreading 4- 

 cleft limb ; lobes rounded, one of tliem larger. Stamens on the tube of tlie corolla, 

 included : filaments filiform, not appendaged. Style subulate : stigma minutely 2-cleft. 

 Capsule obcordate, compressed, loculicidal ; valves bearing the partition. Seeds numer- 

 ous, linear-oblong, striate, transversely rugulose. 



* * * * Calyx and corolla both 5-lobed and nearly regular : antheriferous stamens 4, 

 nearly equal : no sterile filament. 



21. LIMOSELLA. Calyx campanulate; the lobes short. Corolla between rotate and 

 campanulate ; its lobes oblong or ovate. Stamens borne on the tube of tlie corolla : fila- 

 ments slender, unappendaged : anthers by confluence 1-celled. Style short : stigma de- 

 pressed-capitate. Capsule globose-ovoid, 2-celled only at base; the large central pla- 

 centa many-seeded. Seeds ovoid, rugulose. 



