248 SCROPHULARIACE^. 



III. (Rhinanthide^.) Leaves various. Inflorescence simply centripetal. 

 Lower lip or lateral lobes of the corolla external in the bud. Stamens very 

 rarely more than 4. 



Tribe VI. DIGITALE.^. Corolla usually little if at all bilabiate; the lobes all 

 plane, the lateral or one of them external. Anther-cells contiguous at apex and 

 often confluent. Herbs, or some shrubs, none parasitic. 



* Stamens 4 or sometimes 5, nearly equal ; corolla short-campanulate or nearly rotate. 



22. SCOPARIA. Sepals 4 or 5, rather broad, imbricated. Corolla 4-cleft, densely hairy in 

 tlie throat. Stamens 4 : anther-cells distinct. Style sHghtly clavate : stigma truncate. 

 Capsule septicidal. Leaves opposite or verticillate. 



23. OAPRARIA. Sepals 5, narrow, hardly imbricated. Corolla 5-cleft. Stamens often 

 5 : anthers sagittate or horseshoe-shaped ; the cells confluent at apex. Style with tliick- 

 ened apex : stigma 2-lobed. Capsule 2-sulcate, loculicidal. Leaves alternate. 



* * Stamens 2 (only abnormally .3 or 4), distant, straight, exserted, inserted at or below 

 the sinuses between the two lateral and the posterior lobe of the corolla : style usually 

 filiform, with terminal usually small-capitate stigma : capsule mostly compressed and 

 obtuse or emargiuate, few-many-seeded, loculicidal ; the valves tai-dily if at all separat- 

 ing from the placentiferous axis. (Hypogynous disk mostly conspicuous and crateri- 

 f orm or annular. ) 



24. SYNTHYRIS. Corolla from oblong- to short-campanulate, 4-cleft, more or less irreg- 

 ular (upper lobe longer), sometimes irregularly and variably parted, occasionally want- 

 ing. Sepals 4, oblong. Anther-cells parallel or somewhat divergent below, not confluent 

 at apex. Placentae short, chiedy at the centre of the valves. Seeds discoidal, orbicular 

 or oval, witli very close and strictly conformed smooth coat. 



25. VERONICA. Corolla from rotate with very short or hardly any tube to salverform ; 

 its lobes 4 (or sometimes 5), one usually smaller. Anther-cells more or less confluent at 

 the apex. Seeds various. 



Tribe VIL GERARDIE.E. Corolla little or not at all bilabiate; the lobes all 

 plane and mostly spreading, the anterior one external in the bud. Stamens 4: 

 anther-cells distinct to the very apex, or sometimes one of them wanting. Capsule 

 loculicidal, many-seeded. Herbs, most of them partially root-parasitic, and their 

 green foliage inclined to blacken in drying: some Afiican and Indian genera are 

 wholly parasitic and destitute of green herbage, in the manner of Orobanchacece. 



* Anthers by abortion 1-ceIled : corolla salverform ; tube slender : flowers 2-bracteolate. 



26. BUCHNERA. Calyx tubular or oblong, 5-10-ncrved, 5-toothed. Corolla with 

 straiglit or slightly curved tube, and almost equally 5-cleft widely spreading limb. Sta- 

 mens didynamous : anthers appro.xiniate in pairs ; the cell vertical. Style with somewhat 

 clavate and entire apex. Valves of the oblong capsule separating from the placentifer- 

 ous axis. Seeds with reticulated close coat. 



* * Anthers 2-cclle(l ; the cells equal and parallel : pedicels ebractcolate. 

 H— Stamens equal or nearly so, more or less exserted : jjosterior lobes of the corolla united 

 to near tlieir middle. 



27. SEYMERIA. Corolla short, somewhat campanulatc or rotate, pale yellow, calyx 5- 

 cleft or parted. Filaments short, usually woolly at base : anthers obtuse at base, not 

 exceeding the corolla-lobes. Capsule globular or ovate, with more or less pointed and 

 compressed apex. Seeds with a loose reticulated coat. 



28. MACRANTHERA. Corolla (orange-color) salverform, with tube very much longer 

 than the small lobes ; its narrow orifice somewhat oblique ; posterior and partly united 

 lobes somewhat erect, the otliers soon reflexed. Calyx 5-parted ; the divisions long and 

 narrow. Stamens inserted toward the bottom of the corolla : filaments filiform, becoming 

 conspicuously exserted, sparsely glandular-hairy, as are the linear-oblong anthers when 

 young: cells of the latter acuminate at base. Style long and filiform : stigma simple or 

 2-cleft. Capsule globose and bisulcate ; the valves at length 2-cleft. Seeds obovate, 

 lamellate-crested on the back. 



■i— -i— Stamens conspicuously didynamous, shorter than the corolla. 



29. GERARDIA. Corolla from campanulatc to f unnelform ; the throat ampliate ; limb 

 5-partcd, and with the two posterior lobes often rather smaller or more imited. Calyx 

 campanulatc, 5-toothcd or 5-cleft. Stamens commonly more or less hairy : anthers more 

 or less approximate in pairs. Stj'le filiform : stigma clavate-thickened or flattened. Seeds 

 usually angulate and with a rather loose coat. 



