CRUCIFERAE (MUSTARD FAMILY) 



2 divergent spurs of the corolla are longer than the pedicel and the 

 crest of the inner petals is minute. Frequent in rich woods. 



D. canadense, SQUIRREL CoRfr. Similar to the foregoing in general 

 aspect but with many distinctive characteristics. The root-stalks bear 



scattered grain-like 

 tubers. The corolla is 

 heart-shaped, the 

 spurs being very short 

 and rounded. The 

 crest of the inner pet- 

 als is conspicuous. 

 The flowers are green- 

 ish-white, tinged with 

 pink, and have the 

 fragrance of hya- 

 cinths. Rich woods. 

 April-May. 



CRITCIFEIIAE 



(MUSTARD FAMILY) 



Herbs with a thin 

 and pungent juice, 

 and ^-parted, regu- 

 lar flowers. Sepals 

 4 and deciduous. 

 Petals 4, hypogy- 

 nous, their spread- 

 ing limbs forming a 

 cross. Stamens 6, 

 two of the m in- 

 serted lower than 

 the others and 

 shorter. Leaves al- 

 ternate; stipules 

 none. Flowers in 

 terminal racemes or corymbs. A large and natural family. 



Dicentra. a, D. cucullaria; b, underground stem; 

 c, flower of D. canadense ; d, underground stem. 



DRABA 



Low, pubescent herbs with entire or toothed leaves and white 

 or yellow flowers. 



