FAM. 7 59 



in spikes, racemes or corymbs; sepals 4. petals 4. with the 

 spreading blades forming a cross; stamens 6, four longer 

 than the other two. or rarely 2 or 4; style simple or want- 

 ; fruit a 2-celled pod. either long (silique), or broad and 

 short (silicle), or separating transversely into joints (loment). 



1. Fruit a silique. ------_-__. 2 



1. Fruit a silicle. -------_-._. 5 



1. Fruit a lement, ----------_. g 



Silique stalked; — leaves auricled. clasping; flowers white to purple in 

 terminal corymbose racemes; petals with long serrulate claws, 

 ovary stalked, style wanting. Sandhills. Fall. - Warea amplexifolia 

 ;ue not stalked. ----------.3 



3. Silique flattened parallel to the broad partition; valves with veins, 

 flowers yellow; — plant grayish-white with pale hairs; leaves 

 with twice pinnatifid blades on short petioles; flowers in racemes 

 or panicles; ovary sessile, style short. Dry soil. Spring and 

 Summer. - - Sophia pinnata Sisymbrium canescenst, Tansy-mustard 



3. Silique terete or 4-angled. -------__. 4 



4. Pods not beaked, but pointed with the short style; valves 1- veined; — 



.s alternate; flowers in racemes, sepals 4. petals 4 small or wanting. 



stamens 1-6. stigma 2-lobed; seeds in 2 rows, turgid, Roripa (Nasturtium) 



R. Walteri «N. tanacetif olium > , Watercress. Stems branching at the base; 



es bi-pinnatifid; flowers yellow or white; pods sessile. Damp soil. Spring. 



R. palustris. Marshcress. Stems erect, branching; leaves pinnatifid, clasping; 



flowers yellow or pale; pods pedicelled. Swampy soil. Summer. 



4. Pods prolonged into a conic indehiscent beak; valves 1-3 veined; — 



stems more or less widely branching, leaves lyrate-pinnatifid, 

 upper leaves entire or toothed; flowers in racemes, petals bright- 

 yellow, twice as long as the sepals. In waste places or cultivated 

 ground. __.---_-._ Brassica 



B. nigra, Black mustard Upper leaves sessile. 



B. campestris, .Tumi?. Upper leaves clasping. 



B. oleracea, with leaves fleshy, repand-toothed or lobed, to which the cabbage 

 rcrtdus and kohlrabi belong. 



5. Silicles flattened contrary to the narrow partition, orbicular or obovate, 



ovules solitary in each cell; — stems simple or branched; basal 



---s oblanceolate, pinnatifid; stem-leaves narrow; flowers white, 



in racemes or panicles; corolla small or wanting; stamens mostly 



Waste places. ... Lepidium Virginicum, Pepper-grass 



5. Silkies flattened parallel to the broad partition, oval to suborbicular; 

 ovules solitary in each cell; — caulescent herbs with ascending 

 or decumbent more or less forked branches, and oblanceolate 

 leaves; small white fragrant flowers in terminal clusters or ra- 

 cemes. Cultivated. Koniga maritima Alyssum odoratum>, Sweet Alyssum 

 G. Loment 2-jointed. short; — fleshy annuals with entire or pinnatifid 

 leaves and white to purple flowers; the joints 1-celled, the upper 

 1-seeded, the lower 1-2 seeded. In drifting sand along the coast. 



Cakile, Sea-rocket 

 C Chapmami C maritima var. asqualis), Beach-sap. Upper joint thicker 

 than the lower, both 1-seeded. 



