H IE R A C lUM. 



Hawkweed. * 



HiEEACiUM. (Mnnmus.) Heads compound, with many florets 

 enclosed in an involucre of numerous, contiguous, more or less 

 irregularly or spirally imbricated scales (phyllaries). Eeceptacle 

 naked, pitted and slightly fringed. Morets ligulate, five-toothed at 

 the apex. iPruit (achenes) terete, angular, ribbed, truncate at the 

 top, with an entire or crenulate margin ; not beaked. Pappus 

 whitish or rufescent; in one row; rigid, brittle, minutely denticu- 

 late, not dilated at the base. 



Herb j)erenmal; more or less milky ; with scattered, entire, 

 denticulate, or dentate leaves j hairy, jloccose (stellately downy), 

 setose (with, mvimte ffland-tipped hairsj, or suh-glairous. 



NATURAL CROUPS. 



I. PILOSELLOIDEA.— Stoloniferous. Stem scape-like. Fruit 

 minute, slig^htly striate, crenulate at the top. Hairs of the 

 pappus eq^ual, very slender. 



a. Pilosellse. — Scape leafless, or with one leaf. Inner phyllaries 

 acute. 



1. H. PiloBella. 



* From leflCXStlOV, the name of a plant, deriTed from tepag, a hawk : 

 birds of prey haTing been imagined to use thia plant iu order to strengthen their 

 powers of vision, 



B 



