66 American Midland Naturalist Monograph No. 7 



14. Fumariaceae DC. — Fumitory Family 



1. Corolla with each of the two outer petals spurred or saccate at the base; 



capsules several-seeded 1. Dicentra 



1. Corolla with only one petal spurred. 



2. Flowers yellow or pinkish; capsules linear, several-seeded, dehiscent; 



style persistent 2. Corydalis 



2. Flowers deep purple, tipped with crimson; pods globose, 1 -seeded, in- 

 dehiscent, glabrous, minutely tuberculate; style deciduous 3. Fumaria 



1. Dicentra Bernh. 



1. Corolla with 2 divergent spurs; inner petals minutely crested; 

 flowers not fragrant; stem from a bidb-like corm; woods, com- 

 mon. Mar. -May. Dutchman's-breeches 



D. cucullaria (L.) Bernh. 



1. Corolla heart-shaped, the spurs short and rounded; crests of the 

 inner petals conspicuous, projecting; flowers fragrant; stem from 

 a short horizontal rhizome bearing small whitish or yellowish 

 corms; woods, usually less common than the preceding species, 



beginning to flower a week or ten days later. Squirrel-corn 



D. canadensis (Goldie) Walp. 



2. Corydalis Vent. 



1. Flowers rose, tipped with yellow, 12-15 mm long; spur short, 

 rounded, less than 54 the length of the corolla; capsules 3-4 

 cm long, the pedicels 6-10 mm long; rocky woods. Cook, 



La Salle, and Ogle counties. May-Aug. Pink Corydalis 



C. sempervirens (L.) Pers. 



1. Flowers yellow throughout; plants 10-30 cm tall. 



2. Flowers 5-9 mm long; outer petals crested on the back. 



3. Outer petals dentate; capsules pendulous, on slender pedicels 

 1-1.5 cm long; seeds pimcticulate, sharp-margined; moist 

 woods, local. Apr.-May. Pale Coiydalis [C. aurea of 

 auth., not Willd.] C. ftavula (Raf.) DC. 



3. Outer petals entire; capsules erect or ascending, the pedicels 



2-3 mm long; seeds smooth, round-margined; woods, local. 



May-July. Small-flowered Corydalis 



C. micrantha (Engelm.) A.Gray 



2. Flowers 12-16 mm long; outer petals not crested. 



4. Capsules spreading or pendent, torulose; bracts lanceolate; 



seeds smooth; gravelly soil, rare; Cook, La Salle, Ogle, and 



Winnebago covmties. May-Aug. Golden Corydalis 



C. aurea Willd. 



4. Capsules erect or ascending. 



5. Bracts ovate-lanceolate; seeds smooth; rocky woods. 

 Cook, Henderson, Kankakee, Lee, and Peoria counties. 

 Apr.-May C. montana Engelm. 



