182 45. COMPOSURE. 



scabrous, 2 — 3 feet high. Heads in a fastigiate corymb, 5 — 6- 

 flowered. Phyli. about 10;' 5 exterior short, blunt. Florets 

 reddish purple. L. downy. Herb, Slightly aromatic. — ^^Bsinksof 

 streams. P. VIII. IX. ' . E.S.I. 



!!^ ' , ** Heads suhdioecious. 



2. Pbiasi'ies Oaert. Butterbur. 



1. P. vtilgdrU (Desf.) ; 1. roundish-cordate' uneqiially toothed 

 downy "beneath with approximate basal lobes, stigfflas o5f the 

 submale fl. short ovate, 'female 'fl. truncate obliquely.^-K.' xvi. 

 901. Tussilago Petasiies Sm. — Soboliferous. 'Panicle' long and 

 lax in the female plant, ovoid and dense in the, male. Fl. ap- 

 pearing before the 1., on stout erect stalks which are clothed with 

 concave tumid petioles eitherl^afless or with a small limb. L. 

 very large, radical; ultimately often 8 feet broad, glabrous above. 

 —Swamps. P. IV. ■ ' E.S.I. 



[P. fragrans (Presl) which has shbrtly ligulate female fl;-" is 

 established in some places in the South. — P. albtts (Gaert.)'with 

 white or cream-coloured fl., and miich sniallSr deeply scolloped 1., 

 is established in England and Scotland.] 



3. TTTSsiiA'ao Linn. Coltsfoot. 



1. T. Far'fara (L.).—P. xvi. 904.— S'o'boliferous. Fl. ap- 

 pearing before the 1, in bright yellow solitary heads, erect in 

 blossom and seed, drooping "before and after flowering; their 

 stalks clothed "svitli scalelike smooth bracts. L. roundishrcor- 

 date, angular, toothed, downy beneath^-^Jloist' chalky and' clay 

 soils. P.IIirV. • E.S.I. 



Tribe II. Asteroidece. 



Style of the perfect fl.eylindri'c ; branches linear, flat/ equally 

 and minutely downy on the outer surface, ha"ving narrow promi- 

 nent stigmatic lines throughout. 



Section 1. ERIGERINEJE. Heads ne-ifer dioecious, mostly 

 radiant., Anth. without ba^al appendages. L. alternate. , 



4. (7.) A-s'tx^ lArin. Starwort. ,, . 



1. A. Tripdlium (L.) ; st. glabrous corymbose, 1. linear-lan- 

 ceolate fleshy smooth, ili";'olucre imbricate, phyll. blimt mem- 

 branous the iuner ones longer. — E. xvi. 907, Tripolium vulgare 

 DO. — St. 1 — 2 fee"t high, erecty hoUow, leafy, many-flowered. 

 Heads large; disk yellow;, rays bright, blue, often "wanting-; — 

 Muddv salt marshesi P. VIII. IX. : E.,S. I. 



