52 American Midland Naturalist Monograph No. 7 



5. Actaea L. — Baneberry 



1. Pedicels in fruit nearly as thick as the peduncle; petals usually 

 truncate at apex; fruit greenish-white, tipped with the sessile 

 purple stigma; seeds 3-10, each 4-5 mm long; rich woods, com- 

 inon. Apr.- June. White Baneberry. Doll's Eyes [A. pachypoda 

 Ell.] A. alba (L.) Mill. 



1. Pedicels slender; petals spatulate, tapering to the tip; fruit red 

 [white in f. neglect a (Gillman) Robins.] seeds 10-16, each 3-4 



mm long; woods; n. 111. Apr. -June. Red Baneberry 



- A. rubra (Ait.) Willd. 



6. Cimicifusa L. 



1. Leaflets oval or ovate, tiamcate to subcordate at base; racemes 



puberulent ; woods, very rare; St. Clair and Wabash counties. 



June- July. Black Cohosh C. raccrnosa (L.) Nutt. 



1 . Leaflets broadly ovate to suborbicular, at least the terminal one 



deeply cordate at base; racemes pilosulous; rich woods, rare; 



Pope Co. July-Aug. Bugbane C. cordifolia Pursh 



7. Delphinium L. — Larkspur 

 1. Carpel 1; follicle erect, pubescent; flowers blue, pink, or white; 

 annual, nat. from Eur., frequently cult, and occasionally escaped 



to roadsides, fields, and waste places. June-Aug D. ajacis L. 



1. Carpels 3; native perennials. 



2. Follicles erect, puberulent; roots elongate; racemes 10-20 cm 

 long. 

 3. Flowers whitish; racemes virgate; prairies and open woods, 

 w. 111., rare; Augusta, Hancock Co., S. B. Mead. May- 

 June. Prairie Larkspur [D. albescens Rydb.; D. penardi 



of auth., non Huth] D. virescens Nutt. 



3. Flowers bluish or white; racemes lax; Henderson, Macon, 

 Mercer, and Moultrie counties. Blue Larkspur [D. 



azureum Michx.] D. carolinianum Walt. 



2. Follicles widely divergent; roots short, tuberous; racemes lax; 

 flowers bluish-purple (rarely white) ; woods, locally through- 

 out central and s. 111., extending northward to Henry, 

 McLean, and Iroquois counties. Apr. -June. Dwarf Larkspur 

 D. tricornc Michx. 



8. Myosurus L. — Mousetail 

 M. minimus L. Moist ground in woods or fallow fields, local; 

 chiefly in the s. half of 111., extending northward to La Salle Co. Apr.- 

 June. 



9. Ranunculus L. — Buttercup 

 {Bntrachium S.F.Gray) 

 1. Petals white; mature achenes transversely wrinkled; plants 

 aquatic. 



