218 45. COMPOSITE. 



as those of A. minus. Fr. dark brown with a few paler spots 

 towards the top. [A form with rlensety tomentose heads is A. interm. 

 var. subtomentosum Ar. Benn.] Waste places. B. VIII. E. I. 



Section 2. SERRA TULE^E Heads many-flowered ; flowers 

 all tubular, perfect or dioacious, the external row sometimes 

 female. Involucre of many rows of distinct phyllaries. Fila- 

 ments distinct. Pappus in many rows of different lengths, inner 

 row longest, hairlike or feathery, surrounded by a margin. 



28. SEKKAT'ULA Linn. Saw-wort. 



1. S. tinctoria (L.) ; 1. with bristly serratures pinnatifid or 

 lyrate, heads oblong, phyll. ovate adpressed, inner ones linear 

 coloured. Sy. E. B. 704. St. 3. 16. St. 23 feet high, straight, 

 erect, angular, branched above. L. rarely entire. Fl. purple. 

 a ; heads stalked in a lax corymb. /3. S. monticola (Bor.) ; heads 

 subsessile few large close together. E. B. 38. A curious 

 dwarf form in Lizard district. Groves and thickets. P. VIII. 



E.S. 



Section3. CENTAURE^L. Heads many-flowered, discoidal ; 

 outer row of fl. usually barren, enlarged, irregular. Phyllaries 

 in many rows. Filaments distinct. Pappus in many rows of 

 different lengths, second row longest, setaceo-pilose, placed within 

 the margin which surrounds the epigynous disk, rarely 0. 



29. CENTAU'KEA Linn. Knapweed. 



* Phyll. with a scarious pectinate not decurrent appendage. 



\\. C. Jdcea (L.) ; phyll. -appendages erect rounded, pappus 0, 

 1. linear-lanceolate lower 1. broader and toothed. E. B. 1678. 

 Outermost phyll. with deeply pinnatin'd appendages, few 

 innermost entire, the rest irregularly jagged. Heads radiant. 

 Near Hastings. E. N. Bloom field. J . of Bot. xxii. 248. P. VIII. 

 IX. E. 



2. C. nigra (L.) ; phyll.-appendages patent or erect lanceolate 

 or ovate-lanceolate pectinate their teeth subulate, pappus or 

 short deciduous, 1. lanceolate or ovate-lanceolate acute. St. 

 4 2 ft. high. L. green ; lower narrowed into long stalks, entire 

 or sinuate-dentate ; upper sessile. Heads globose. Few inner- 

 most phyll.-appendages torn. Fr. oblong, downy. a ; phyll.- 

 appendages erect or patent ovate-lanceolate usually quite 

 covering the phyll. their teeth long. E. B. 278. Mart. FL 

 Rust. 130. JR." xv. 761. St. usually with long 1-headed 



