176 Cruciferaceae 
CC. Leaves 2-pinnatifid; flowers yellow; sepals laciniate-reniform. E. 
C. cusickii Wats. 
AA. Flowers golden-yellow; annual or biennial; capsule linear or nearly so. 
D. Capsule incurved-ascending; seed acute-margined. FE, (C. aurea occidentalis.) 
(eh montana Engelm. 
DD. Capsule spreading or pendulous; seed obtuse-margined. EF. 
C. aurea Willd. (Golden Corydalis) 
CRUCIFERACEAE (Brassicaceae) Mustard Family 
Herbs, rarely shrubby at base, annual or biennial or perennial, mith mustard or 
turnip taste. Leaves alternate, pinnately or palmately (Dentaria) veined. Flowers 
perfect, solitary or in racemes or corymbs or head-like clusters. Sepals 4, deciduous. 
Petals 4, rarely none, alternate with the sepals. Stamens 6, tetradynamous, rarely 
only 2 or 4. Ovary 2-celled by a partition from one lateral placenta to the other, rarely 
only I-celled; style O—1; stigma entire or 2-lobed. Fruit a pod, often much elon- 
gated, indehiscent or opening by 2 valves from the base; partition left when valves open. 
A. Léaves palmately-compound or -lobed or -toothed. Group I, L (p. 176) 
AA. Leaves not palmately veined, or if so merely serrate. 
B. Basal leaves 2—-4.5 dm. long, not pinnately compound nor pinnatifid. 
Group I, K (p. 176) 
BB. Basal leaves smaller, often pinnately, compound or pinnatifid. 
C. Flowers solitary on a scape. GROUP fais (p. 178) 
CC. Flowers in racemes or heads. 
D. Pod transversely divided into 2 terete or slightly flattened or angular seg- 
ments or joints, indehiscent, upper joint the larger; plant glabrous; leaves 
entiré or sinuate-toothed. Group |, Y p. 176) 
DD. Pod or plant ox leaves not as in D. 
F. Leaves awl-shaped; plants aquatic. GRouP 2-P (Galvan 
EE. Leaves not awl-shaped; plants mostly terrestrial. 
F. Pod 3 or more times as long as wide including its stipe and beak. 
Group | (p. 176) 
FF. Pod less than 3 times as long as wide including its stipe and beak. 
Group 2 (p. 178). 
GROUP I (with long pods) 
A. Petals yellow. 
B. Leaves entire or merely serrate. \ 
C. Seeds in 2 rows in each cell of the pod; mature pod 3—14 mm. long. 
DrRaBA (p. 187) 
CC. Seeds in | row in each cell of the pod; mature pod 1.5—10 cm. long (or as 
short as | cm. in Erysimum cheiranthoides. ) 
D. Ped torulose; valves veinless or faintly I-veined; petals 4—6 mm. long. 
SCHOENOCRAMBE (p. 183) 
DD. Pod not torulose; valves strongly keeled by the prominent mid-vein ; petals 
6—25 mm. long (except E. cheiranthoides). ERYSIMUM (p. 190) 
BB. At least some of the leaves lobed or pinnatifid or pinnately compound. 
E. Most of the leaves of the upper V4 of the stem entire or merely serrate. 
F. Ped not beaked, 5—12.5 cm. long when mature. (See DD.) 
FF. Pod beaked, 2 cm. or less long when mature. (See HH.) 
EE. Most of the leaves of the upper V4 of the stem lobed or pinnatifid or pin- 
nately compound. 
G." Pod indehiscent; seeds 2—10. RAPHANUs (p. 184) 


