128 American Midland Naturalist Monograph No. 2 



1. Caltha L. — Marsh-marigold 

 C. palustris L. Wet ground, centr. and n. III. Apr. -May. 



2. Hydrastis Ellis 

 H. canadensis L. Goldenseal. Woods, not common. Apr.-May. 



3. ISOPYRUM L. 



7. b'lternatum (Raf.) T. & G. False Rue Anemone. Moist woods, common 

 throughout 111., except the s. part. Apr.-May. 



4. Aquilegla L. — Columbine 

 A. canadensis L. Wooded ravines, throughout III. Apr.-June. 



5. AcTAEA L. — Baneberry 



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

 apex; fruit greenish white, tipp>ed with the sessile purple stigma; seeds 3- 

 10, each 4-5 mm. long; rich woods, common. Apr.-June. \^A. pachypoda 



Ell.; A. "brachypoda" Rydb.} White Baneberry. Doll's Eyes 



A. alba (L.) Mill. 



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



seeds 10-16, each 3-4 mm. long; woods, n. 111. Apr.-June 



...A. rubra (Ait.) Willd. 



6. CiMICIFUGA L. 



C. racemosa (L.) Nutt. Black Cohosh. Bugbane. Woods, very rare, St. 

 Clair and Wabash counties. June-July. 



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; rac-emes 10-20 cm. long. 



3. Flowers white or bluish white; racemes virgate; seeds wingless; prairies 

 and open woods, w. 111., rare. May-June. [D. albescens Rydb.; D. 

 penardi of auth., not Huth} Prairie Larkspur D. vircscens Nutt. 



3. Flowers blue; raceme lax; seeds winged; "banks of the Mississippi near 



Oquawka," Patterson. [D. azureum Michx.} Blue Larkspur 



D. carolinianum Walt. 



2. Follicles wid'ely divergent; roots short, tuberous; racemes lax; flowers blue 

 (rarely white); woods, local; apparently absent from the n. part of the 

 state. May-June. Dwarf Larkspur D. tricorne Michx. 



8. Myosurus L. — Mousetail 



M. minimus L. Moist ground in woods, local. Apr.-June. 



