964 



COMPOSITAE 



Eclipta 



Eclipta alba (U Hassk 



50 



Map 2112 



Rudbeckia hirta L. 



6 50 



Map 2113 



Rudbeckia subtomentosa Pursh 



Railroad, St. Joseph County. I am regarding this specimen as a migrant 

 and we have no record that other plants were left and perpetuated them- 

 selves. 



N. Y., Ont., and N. Dak., southw. to Fla., Tenn., and Mo. 



9166. ECLfPTA L. 



1. Eclipta alba (L.) Hassk. ( Verbesina alba L.) Yerba de Tajo. Map 

 2111. Local throughout the state, but frequent to common along the bank 

 of the Ohio River and in the Lower Wabash Bottoms. This is a southern 

 species which is migrating northward and it may be absent as yet from the 

 northern tier of counties. It prefers the muddy shores of streams, ponds, 

 and sloughs but is found also in low places in cultivated fields. 



Mass. to Nebr., southw. to Fla., Tex., and Mex., and southw. 



9178. RUDBECKIA L. Coneflower 



Corolla lobes recurved after anthesis, about 0.5 mm long, usually 0.3-0.4 mm long. 



Chaff of disk acute, hispid-ciliate on the margins and on the back at the summit; 



plants flowering mostly from the middle of June to the middle of August; style 



branches long and subulate at anthesis ; leaves not divided 1. R. hirta. 



Chaff of disk acute, not strictly ciliate but the margins at the summit and the back for 

 half its length densely covered with short-stalked glands, and with a few color- 

 less, hispid hairs; plants flowering mostly from the middle of August to the first 

 of October; style branches short and obtuse at anthesis; at least the lower leaves 



3-lobed, rarely none of the leaves lobed 2. R. subtomentosa. 



Corolla lobes erect or some of the outer ones spreading after anthesis, more than 0.5 

 mm long except in Rudbeckia palustris. 

 Heads greenish; chaff truncate and densely glandular-pubescent at the summit; plants 

 generally 1-2 m high; at least the lowest leaves 3-7-parted, the segments va- 

 riously toothed 3. R. laciniata. 



Heads purplish; chaff not truncate at the summit; plants generally less than 1 m 

 high; leaves entire, toothed, or 3-lobed. 

 Chaff long-acuminate or aristate at the apex, glabrous; some or all of the lowest 



leaves petiolate, some or all more or less 3-lobed 4. R. triloba. 



Chaff merely acute at the apex; no 3-lobed leaves. 



