COMPOUND FLOWERS. 341 



are hoary underneath, and by its bright lemon-coloured 

 flowers. Fl. May July. Perennial. 



2. H. murorum (Wall Hawk-weed). Stem many- 

 flowered, with 1 leaf, branched above ; root-leaves egg- 

 shaped, toothed at the base. Walls and rocks ; common. 

 A very variable plant, 12 18 inches high, rarely having 

 more than one leaf on the stem, sometimes none ; the 

 leaves are usually more or less hairy, the flowers small, 

 yellow. Fl. July, August. Perennial. 



3. H. sylvdticum (Wood Hawk- weed). Stem many- 

 flowered, with a few leaves ; leaves narrow, egg-shaped, 

 toothed, with the teeth pointing upwards ; involucre 

 hoary with down. Woods and banks ; common. A 

 very variable plant, both in size and habit. The leaves 

 are sometimes very slightly toothed, at other times 

 deeply so, and often spotted with purple ; the flowers 

 are large and yellow. Fl. August, September. Per- 

 ennial. 



4. H. Sabaudum (Shrubby Hawk- weed). Stem rigid, 

 many-flowered, leafy ; lower leaves tapering into a short 

 stalk, upper sessile, rounded at the base Woods and 

 banks ; not unfrequent. As variable a plant as the last. 

 Fl. August, September. Perennial. 



5. H. umbellatum (Narrow-leaved Hawk- weed). 

 Stem rigid, many-flowered, leafy ; leaves narrow, slightly 

 toothed ; flowers in a terminal corymb ; scales of the 

 involucre reflexed at the point. Woods ; not unfre- 



. quent. A tall plant, 2 3 feet high, with a remarkably 

 erect growth, unbranched, and terminating in an almost 

 umbellate tuft of large, yellow flowers. Fl. August, 

 September. Perennial. 



* No less than twenty-two other species of Hawk-weed 

 besides the above are described by Hooker and Arnott, 

 some of which are doubtful natives, the others rare. 

 Of these it is not thought necessary to give even the 

 names here, but most of the common species will agree 

 with one or other of the descriptions given above. The 

 student, however, must not be disheartened if he find 



