1/0 45. COMPOSITE. 



Stam. 0. Stigmas 2, diverging, linear. Fr. compressed, 

 each occupying a cell in the involucre.] 



Suborder I. TUB ULIFLOR^E. Perfect florets tubular, re- 

 gular, teeth 4 or 5. 



Tribe I. Eupatorieae. 



Style of the perfect florets cylindrical with elongated slightly 

 clavate branches which are downy above ; stigmatic lines but 

 little prominent, often not extending as far as the middle of the 

 branches. 



Section 1. ADENO STYLE '^E. Heads homogamous (florets 

 all perfect). Pappus pilose and rough. 



1. EUPATORIUM Linn. Hemp-Agrimony. 



1. E. cannabinum (L.) ; 1. in 3 or 5 deep lanceolate serrated 

 segments the middle one longest. E. B. 423. St. herbaceous, 

 erect, striated, scabrous, 2 3 feet high. Heads in a fastigiate 

 corymb, 5 6-flowered. Phyll. about 10 ; 5 exterior short obtuse. 

 Florets reddish-purple. L. downy. Herb slightly aromatic. 

 Banks of streams. P. VIII. IX. 



Section 2. TUSSILAGINEJE. Heads heterogamous or sub- 

 dioecious. 



2. PETASITES Gaert. Butterbur. 



1. P. vulgaris (Desf.) ; 1. rountlish-cordate unequally toothed 

 downy beneath with approximate basal lobes, stigmas of the sub- 

 male florets short ovate, female fl. truncate obliquely. jR.xvi.901. 

 Tussilago Petasites Sm., E. B. 431 and 430. Thyrsus long and 

 lax in the female plant, ovate and dense in the male. Root 

 thick, creeping extensively. Fl. appearing before the 1., on stout 

 erect stalks which are clothed with concave tumid petioles either 

 leafless or with a small limb. L. very large, radical, ultimately 

 often 3 feet broad, glabrous above. Swamps. P. IV. 



[P. fragrans (Presl) which has shortly ligulate female fl. is 

 quite naturalized in some places in the South.] 



3. TUSSILAGO Linn. Coltsfoot. 



1. T. Farfara (L.). E. B. 429. R. xvi. 904. Root, creeping 

 extensively. Fl. appearing before the L, in bright yellow solitary 

 heads, erect in blossom and seed, drooping before and after 

 flowering, their stalks clothed with scalelike smooth bracts. L. 



