56 American Midland Naturalist Monograph No. 7 



and Champaign counties. Apr.-May. 

 Bristly Buttercup R. hispidus Michx. 



10. Thalictrum L. — Meadow-rue 

 1. Leaflets glabrous on both suifaces. 



2. Leaflets thin, suborbicular in outline, obtusely 5- to 9-lobed; 

 stem-leaves slender- petioled; rich woods. Apr.-May. Early 

 Meadow-rue T. dioicum L. 



2. Leaflets thick, oval, sharply 3-lobed, revolute-margined ; stem- 



leaves sessile or nearly so; moist thickets and hedge-rows. 



June-July T. hypoglaucum Rydb. 



L Leaflets glandular or short-pubescent beneath; stem-leaves sessile. 



3. Leaflets finely glandular with short-stipitate or sessile glands on 



the lower surface; woods and roadsides, local. May- June. 



Waxy Meadow-rue -... T. revolutum DC. 



3. Leaflets finely short-pubescent on the lower surface, not glandu- 

 lar; moist ground, local. May-June. Purplish Meadow-rue 

 T. dasycarpiun Fisch. & Lall. 



1 1. Trautvetteria Fisch. & Meyer — False Bugbane 

 T. carolinicnsis (Walt.) Vail. Near Beardstown, Cass Co., C. A. 

 Geyer in 1842. June- July. 



12. Anemone L. 



{Pulsatilla Adans. ) 

 1. Styles elongate, plumose; plant silky-villous; leaf-segments linear; 

 sepals 5-7, bluish-purple to white, 2-3.5 cm long; prairie soil; 

 n. 111. Mar.-Apr. Pasque Flower [A. patens var. wolfgangiana 



sensu A.Gray, non (Besser) W.J.D. Koch] A. ludoviciana Nutt. 



1. Styles shorter, glabrous or pubescent, not plumose; sepals white to 



purplish. 



2. Sepals 10-20, linear-elliptical, pubescent outside; stem 8-20 cm 



tall, arising from a small tuber; prairie soil, gravelly slopes, 



rocky banks or bluffs in the n. part of the state, extending 



southward to Pike, Menard, and Macon counties. Apr.-May. 



Carolina Anemone A. caroliniana Walt. 



2. Sepals 5 or 6; plants with a rhizome. 



3. Stem usually branched, several-flowered, 30-90 cm tall; sepals 

 pubescent. 

 4. Stem-leaves sessile; sepals 12-17 mm long, white; fruiting 

 heads globose; achenes flat, wing-margined, orbicular, 

 sparsely pubescent, the style 3 mm long; roadsides and 

 open woods, common; s. to Jackson Co. May- July. 

 Meadow Anemone [A. pennsylvanica L.] ..A. canadensis L. 

 4. Stem-leaves stalked; sepals 8-10 mm long, greenish-white; 

 achenes densely villous. 



