16 COMMON CANADIAN WILD PLANTS. 



3. CORYD'ALIS, Vent. CORYDALIS. 



1. C. au'rea, Willd. (GOLDEN CORYDALIS.) Stems low 

 and spreading. Leaves dissected, flowers in simple racemes, 

 golden yellow, the outer petals keeled, but not crested, on the 

 back. Pods pendulous. Kocky river-margins and burnt 

 woods. 



2. C. flav'ula, DC. (YELLOW C.) Stems low and spread- 

 ing. Flowers pale yellow, the outer petals wing-crested, on 

 the back ; crest 3-4- toothed. South-western Ontario. 



3. C. glauea, Pursh. (PALE CORYDALIS.) Stems upright, 

 1-4 feet high. Flowers in compound racemes, purplish tipped 

 with yellow. Pods erect. Eocky woods. 



4. FIIMA'RIA, Tourn. FUMITORY. 



F. officina'lis, L. (COMMON FUMITORY.) Corolla flesh- 

 coloured, tipped with crimson. Flowers small, in. dense 

 racemes or spikes. Waste places near dwellings. 



ORDER X. CRUCIF'ER^E. (CRESS FAMILY.) 



Herbs with a pungent watery juice, alternate letives with- 

 out stipules, and regular hypogynous flowers in racemes or 

 corymbs. Pedicels without bractlets. Sepals 4, deciduous. 

 Petals 4, forming a cross-shaped corolla. Stamens 6, two 

 of them shorter. Fruit a silique or silicle. (See Chap. IV., 

 Part I. for dissection of typical flower.) The genera are 

 distinguished by the pods and seeds, the flowers in all cases 

 being much alike. The seeds are exalbuminous, consisting 

 entirely of the embryo, which is folded up in a variety of 

 ways. The radicle may be bent so as to lie against the 

 edge of the cotyledons, and the seed when cut through cross- 

 wise shows this section : OQ ; the cotyledons are then said 

 to be accumbent. Or the radicle may be folded against the 

 back of the cotyledon, showing this cross-section : V 3 ^ , in 

 which case the cotyledons are said to be incumbent ; and if, 

 beside's being incumbent, the cotyledons are doubled round 

 the radicle, thus : ^^ , they are then conduplicate. 



