104 crucifp:r^. 



less. Seeds very small, turgid and wingless, usually numerous, in two rows iu each cell 

 (scarcely so in N. sylvestre), minutely tuberculate or in a few species reticulate-pitted. 



35. BARBAREA. Flowers somewhat larger than in the preceding. Sepals oblong, often 

 colored ; lateral pair often saccate at base and slightly cornute on the back near apex. 

 Petals spatulate or with obovate blades and slender claws. Stamens 6, free and unappen- 

 daged, distinctly tetradynamous. Style short; stigma bifid. Capsule linear, elongated, 

 somewhat tetragonal. Seeds uniseriate in the cells. 



-)^ -1^ -1— Flowers purple : pods linear, elongated. 



36. lODANTHUS. Sepals oblong, shorter than the claws of the petals, somewliat spread- 

 ing in authesis ; the lateral pair narrower and more or less distinctly liorned or appendaged 

 upon the back near apex. Petals broadly spatulate. Stamens 6, strongly tetradynamous. 



* * Pods more or less strongly compressed parallel to the partition. 

 ■i— Petals toothed or lobed : fruit narrowly linear, elongated. 



37. DRYOPETALON. Sepals elliptic, purplish; the lateral gibbous at base. Petals 

 exserted ; the blade toothed or lobed. Stamens 6, free and unappendaged ; antliers ovate- 

 oblong. Stigma nearly sessile, 2-lobed. Seeds many, small, somewhat 2-rowed ; cotyledons 

 nearly accumbeut. Valves of capsule 1-nerved and veined. 



-I— -1— Petals entire or retuse, not lobed. 

 •H- Pods suborbicular : seeds broadly winged : pubescence simple. 



38. PLATYSPERMUM. Flowers minute, solitary, borne on naked scapes. Sepals broad, 

 erect, equalling the white linear-spatulate petals. Seeds in two rows, reticulated ; cotyle- 

 dons longer than the radicle. Leaves lyrate, few-lobed or subentire. 



++ ++ Pods broad, lanceolate to elliptic or oblong : seeds mostly biseriate. 



39. SELENIA. Flowers conspicuous, yellow, in a leafy bracteate raceme. Sepals erect, 

 ovate-lanceolate, acutish, somewhat saccate at base. Petals spatulate. Stamens 6, free and 

 unappendaged ; anthers oblong. Pods oblong to broadly elliptic, upon short broad stipes, 

 and beaked by slender styles. Stigma capitate. Glands 10. Seeds in two rows, minutely 

 pitted and margined with a thin cartilaginous wing. Cotyledons longer than the radicle. 



40. PARRY A. Flowers showy, purple or rose-colored. Sepals oblong, erect ; the lateral 

 gibbous at base, nearly equalling the claws of the broad-bladed petals. Anthers included, 

 oblong, subsagittate at base. Pod with flat 1-uerved reticulated valves. Stigma 2-lobed; 

 lobes approximate. Seeds orbicular, winged or wingless. 



++ -H- ++ Pods narrower, linear-oblong to linear. 

 = Pubescence simple or none. 



41. LEAVENWORTHIA. Flowers conspicuous, yellow, whitish, or purplish. Sepals 

 linear-oblong, equal at base, usually spreading in anthesis, considerably exceeded by the 

 obovate or oblanceolate cuueate petals. Stamens 6, strongly tetradynamous, free and 

 unappendaged ; anthers oblong. Pod ol)long or linear, beaked by a rather slender style, 

 sometimes torulose. Stigma somewhat 2-lobed. Seeds in one row, minutely pitted, 

 margined with a firm thick wing. Cotyledons orbicular; radicle sliort and straight or more 

 or less oblique. 



42. DENTARIA. Sepals equal at base, erect or nearly so. Petals much longer, with 

 slender claws and ovate spreading lilades. Pods linear, .straight witli .stout replum, firm 

 nerveless flat valves, and nerveless partition ; stigma short, capitate or rarely 2-lol>ed. Seeds 

 in one row, wingless. Cotyledons often thick, more or less unequal and somewliat obli([ue, 

 petiolate. Funiculus often thickened in fruit. 



43. CARDAMINE. Sepals equal at l)ase, erect or more or less spreading. Petals obovate 

 to narrowly spatulate. Pods of the preceding. Seeds in one row, wingle.ss ; cotyledons 

 flattened, strictly accumbeut or one slightly overlapping the radicle, more or less petiolate. 

 Funiculus very slender. 



= = Pubescence in jiart or wholly branched. 



44. ARABIS. Sepals erect or nearly so, green or less frequently colored ; the lateral pair 

 usually gibbous at base. Petals obovate or spatulate, usually unguiculate, commonly cqh» 



