28o 



C0iIp6siT--E 



8 — 12 in. high, downy ; haves oblong-lanceolate, toothed, 

 cottony beneath ; heads 2 — 3 in, across, in a dense terminal 

 corymb; involucre ovoid, woolly; floret's -hghl purple, scented like 

 Heliotrope.— Alpine momitains ; rare.— Fl. August. Perennial. 



33. S E R R -iTU L .Si 

 (Saw - wort). — Herbs 

 with simple, sometimes 

 pinnatifid, serrate leaves, 

 and generally dicecious 

 heads, with imbricate, 

 not spinous bracts, a 

 scaly receptacle, florets 

 all tubular, crimson or 

 white, anthers nearly, or 

 (juite, without tails, and 

 a pappus of scN'eral 

 rows of unequal stiff 

 hairs, the inner longest. 

 (Name from the Latin, 

 meaning saic - toothed, 

 with reference to the 

 leaves. ) 



T. S. linctona ((."om- 

 mon Saw-wort).- The 

 only Mritish species, a 

 slender plant, i — 2 feet 

 high, with a stiff, erect, 

 angular stem, slightly 

 branched above ; leaves 

 deeply lyrately pin- 

 natifid and serrate; 

 heads few, small, in a 

 loose corymb ; outer 

 bracts smooth, adpress- 

 ed ; inner tinged with 

 red ; florets crimson. — 

 Pastures ; fre(|Ucnt. — 

 l'"l. August. Perennial. 



34. Ckntacri'a (Knapweed).— A\'iry herbs with leaves some- 

 times spinous; lieads egg-shaped or globose; bracts imbricate, 

 adpressed, membranous, or sometimes siinous, cr fringed • 

 receptacle flat, bristly; florets all tubul^ir, but the outer usually 

 large, unsymmetrical, and neuter. (Name from the Centaur 



serrAtut.a timci 



