GENERA OR FAMILIES. 163 



linear-lanceolate erect scales, and 4-5 external ones ; re- 

 ceptacle naked ; fruit compressed, striated. 



j*f Pappus sessile, setaceous in the ray, feathery in the disk 

 florets. 



(165) Thrincia involucre oblong, in one row, with a few addi- 



tional scales at the base; receptacle punctured; fruit 

 beaked ; pappus in two rows, the outer setaceous, decidu- 

 ous, the inner longer, feathery ; marginal row of fruits, 

 scarcely beaked, with a short scaly fimbriated pappus. 



(166) Leontodon involucre imbricated, the exterior scales much 



smaller in 1-3 rows ; receptacle punctured ; fruit smooth, 

 slightly beaked ; pappus in two rows, the outer setaceous, 

 persistent, the inner longer, feathery. 



fft Pappus sessile, uniform in the ray and disJc florets. 

 J Pappus in one row. 



(167) Oporinia involucre imbricated, the exterior scales much 



smaller, in several rows ; receptacle not scaly ; fruit atte- 

 nuated, uniform ; pappus feathery, dilated at the base. 



(168) Hieracium involucre imbricated, with many oblong scales ; 



receptacle not scaly ; fruit terete, ribbed, not beaked, with 

 a very short crenulated margin ; pappus pilose. 



JJ Pappus in two rows. 



(169) Picris involucre of one row of equal scales, with unequal 



linear often spreading scales at the base ; receptacle dotted ; 

 fruit terete, transversely striated, constricted or slightly 

 beaked above ; pappus feathery, the outer row subpilose. 



(170) Cichorium involucre in two rows, the outer of 5 short- 



ish, the inner of 8-10 longer converging scales ; recep- 

 tacle naked, or slightly pilose ; fruit crowned by a ring of 

 two rows of minute erect scales. 

 %%+ Pappus in many rows. 



(171) Sonchus involucre imbricated* with two or thrc-e rows of 



M 2 



