(&) Pods cylindrical ; seeds ellipsoid. Flowers very small, yellow. 



Sisymbrium, VIII 

 (c) Pods cylindrical ; seeds globular. Flowers of moderate size, 



yellow. Brassica, VII 



(t?) Pods cylindrical ; seeds in 2 rows ; flowers white. Or pods 



ovoid or ellipsoid ; flower yellowish. Aqiiatic plants, or 



growing in wet soil. Radicula, IX 



(e) Pods cylindrical or angled ; seeds in a single row, flattened. 



Flowers yellow. Barbarea, X 



r^> 



Pods elongated, often jointed, tapering toward the tip, never splitting 



open. Raphanus, VI 



D 



Pods flattened parallel to the partition, splitting open when ripe. 



(a) Wild species ; leafy-stemmed ; growing in or near water. Pods 



linear. Cardamine, XII 



(6) Wild species ; stems naked below, bearing only 2 or 3 leaves. 



Pods lanceolate. Dentaria, XI 



(c) Wild species ; leafy -stemmed ; growing on dry ground or 



rocks. Pods linear ; seeds usually winged or margined. 



Arabis, XIII 



(d) Cultivated species. Pods round or roundish. Lobularia, I 



(e) Cultivated species; covered with a grayish down of star- 



shaped hairs. Pods cylindrical. Matthiola, II 



I. LOBULARIA Desv. (KONIGA) 



Perennial, though usually growing as an annual. Stems 

 branching, diffuse ; branches slender. Leaves small, entire, 

 downy, with forked hairs. Flowers small, white, in numerous 

 terminal racemes. Petals obovate, entire, twice as long as the 

 sepals. Filaments enlarged below. Pod round, compressed ; 

 seeds 1 in each cell.* 



1. L. maritima Desv. SWEET ALYSSUM. Stem weak, diffuse, 

 ascending, minutely downy. Lower leaves narrowed into a petiole, 

 the upper sessile. Racemes erect, many-flowered. Flowers fragrant, 

 pedicels ascending. Pod often pointed. Common in cultivation and 

 often run wild.* 



