160 45. COMPOSITE. 



35. CiCHOBiUM. Heads many-flowered; PKyll. in 2 rows : 

 outer of about 5, lax, shortish ; inner of 8 — 10, longer, con- 

 verging, at length refl^xed. Receptacle sometimes slightly 

 pilose. Fr. obovate, compressed, striate. Pappus of 2 rows 

 . , of minute erect chaffy scales. 



*** Pappus feathery. Receptacle scaly. 



•36. Hypochcehis. Heads many-flowered. Phyll. oblong, 

 imbricate. Fr. glabrous, murioate, often beaked. Pappus 

 in 2, rows, outer short and setaceous, inner long and fea- 

 thery ; or in 1 row a,nd feathery., 



*.*** .Pappus feathery, or on the exterior fruit scaly i Receptacle 

 withoiii scales. 



37. Theincia. Inv. oblong. PhyU. in 1 row, with a few 

 additional at the base. Fr. beaked. Pappus in 2 rows; 

 outer setaceous, deciduous ; inner longer, feathery, dilated 

 at the base. , Marginal row of f-ruits enveloped in the 

 phyllaries, scarcely beaked, and with a short crovmr-like 

 pappus. 



38. Apabgia. ItiT. subimbricate ; exterior phyll. mucli 

 smaller, in 1 — 3 rows. Fr. uniform, sUgntly beaked. 

 Pappus of all the fr. in 2 rows ; , outer , setaceous, persistent ; 

 inner longer, feathery, dilated at the base ; or in 1 row, 

 featheiy. 



• .39. TsAGOPoeoN. Inv. simple, of 8 — 10 equal phyll. con- 

 nected at the base. Fr. longitudinally stiiate, with a long 

 beak ; basal scar lateral. Pappus in many rows, feathery, 

 interwoven in the ray. 



40. PiCEis. Phyll. in 1 row, equal, unth unequal linear often 

 spreading ones at the base. Pr. terete, transversely striate, 

 constricted or slightly beaked above. Pappus in 2 rows, 

 feathery ; external row rather hairlike. 



41. Helminthia. PhyU. in 1 row, equal, with equal subu- 

 late adpressed -ones at the base, and surroutided by 3 — 5 

 leqflike loose bracts. Fr. .compressed, transversely rugose, 

 rounded at the end and with a slender beak longer than the 

 fruit. Pappus in several rows, feathery. 



***** Pappus Jiliform, deciduous, never feathery or dilated at 

 the base. Receptacle generally loithout scales. Fruit com- 



42. Lacttjca. Heads few-flowered. Phyll. with a mem- 

 branous margin, imbricate in 2 — 4 rows ; outer row shorter. 

 Fr. plane-compressed, contracted and prolonged into a fili- 

 form beak which is neither crowned nor muricate. 



