125. CoMPOsiTAE 263 



7. (filter bracts foliaceous, 2-5 times the lent;lh of the disk; 

 achenes flat, 7-9 mm long; corollas 4-loothecl; stamens 



included; wet ground throughout 111. Sept. -Oct 



B. coinosa (A.Gray) Wieg. 



2. Rays present, conspicuous. 



8. Leaves simple, oblanceolate to linear-lanceolate, acuminate, 

 serrate, connate at the base; heads nodding in fruit; 

 achenes cuneate, 4-angled, the 4 awns retrorsely barbed; 

 wet ground, local. July-Oct. [B. chrysanthemoidcs sensu 

 auth., non Michx. ; B. filarncntosa Rydb. ; B. clliptica 



(Wieg.) Gleason] B. cernua L. 



8. Leaves pinnately parted or dissected; achenes flat, upwardly 



ciliate. 



9. Outer bracts 6-12, ciliolate or glabrous, not exceeding the 



inner; (awns sometimes only 0.5 mm long). 



10. Achenes elliptic-obovate, more than 2 mm wide, the 



margins scarious; moist ground along roads, or in 



swales and fields throughout 111. Aug.-Oct. [B. 



aristosa var. ynutica A.Gray; B. aristosa var. fritcheyi 



Fern.] B. aristosa (Michx.) Britt. 



10. Achenes cuneate, 2 mm or less in width; moist ground 

 throughout 111. July-Oct. [B. trichospcrma (Michx.) 

 Britt.]. Plants with narrow leaf-segments have been 

 named B. coronata var. tenuiloba (A.Gray) SherfT 



B. coronata (L.) Britt. 



9. Outer bracts 12-20, coarsely hispidulous, mostly longer 

 than the inner; swampy ground, local. July-Sept. [B. 



involucrata (Nutt.) Britt., non Phil.] 



B. polylepis Blake 



1. Plants aquatic, the immersed leaves finely dissected; uppermost 

 leaves lanceolate, serrate; achenes terete, 1-1.5 cm long, the 

 3-6 awns divergent, barbed only toward the apex; ponds and 

 slow streams, rare; Cook Co., E. J. Hill in 1878; Lake Co., E. J. 

 Hill in 1898. Aug.-Sept. Water-marigold [Megalodonta beckii 

 (Torr. ) Greene] B. beckii Torr. 



Tribe 8. Hrlenieae 



39. Hymenopappus L'Her. 



H . scabiosaeus L'Her. Open sandy woods, rare, Cass, Kankakee, 

 and Mason counties. May-June. [H. carolinensis (Lam.) Porter]. 



40. Actinea Juss. 



A. herbacea (Greene) B.L.Robins. Dry gravelly banks, stony fields, 

 and limestone hills near Joliet, Will Co., E. J. Hill, May 9, and 27, 

 1902, June 8, 1907; H. C. Cowlcs, May 13, 1906; Manito. Mason Co., 

 /. Voss. Also in Ottawa Co., Ohio, and s. Ontario, C^anada. [Tetra- 

 neuris herbacea Greene; Actinella scaposa var. glabra A.Gray]. 



