224 COMPOSITE. (COMPOSITE FAMILY.) 



or point. Erect, branching herbs, with alternate leaves decurrcnt on the angled 

 stem and brandies, which are terminated by single or corymbed (yellow, rarely 

 purple) heads ; often sprinkled with bitter and aromatic resinous globules. 

 (Named after J/ilm, the wife of Mc:;elaus.) 



1. II. autumnalc, L. (SNEEZE-WEED.) Nearly smooth ; leaves lan- 

 ceolate, toothed ; rays longer than the globular disk. Ij. Alluvkil river-banks ; 

 common (except in New England). Sept. Plant l-3 high, bitter: the 

 forymbed heads showy. 



47. L.EPTOPODA, Nutt. LEPTOPODA. 



Kays neutral. Otherwise nearly as in Ilelenium. In the true species (of 

 which L. puberula and L. brevifolia may be found in S. Virginia) the steim. arc 

 simple, naked above, like a long peduncle, -and bearing a single head (whence 

 the name, from Aorros, slender, and TTOUS, foot) ; but the following is leafy to the 

 top, and branched. 



1. L. bracliypoda, Torr. & Gray. Stem corymbed at the summit (1 

 -4 high); leaves oblong-lanceolate, dccurrent on the stem; disk globular, 

 brownish; rays pretty large ('-f long), yellow, or in one variety brownish- 

 purple, sometimes with an imperfect style, ty Damp soil, from Illinois south- 

 ward. June - Aug. 



48. BAI^DWINIA, Nutt. BALDWINIA. 



Heads globular, many-flowered, radiate ; the long and narrowly wedge-shaped 

 rays neutral. Involucre short, of many thickish small scales imbricated in 3 or 

 4 rows, the outer obovate and obtuse. Receptacle strongly convex, with deep 

 honeycomb-like cells containing the obconieal or oblong silky-villous achenia. 

 Pappus of 7-9 lance-oblong erect chaffy scales. A perennial herb, smoothish, 

 with slender simple stems (2 -3 high), bearing alternate oblanceolate leaves, 

 and the long naked summit terminated by 41 showy large head. Hays yellow 

 (!' long) ; the disk-flowers often turning dark purple. (Named for the late Dr. 

 William Baldwin.) 



1. B. uni flora, Nutt. Borders of swamps, Virginia and southward. 

 Aug. 



49. MARSIIAJLL.IA, Schreb. MARSHALLIA. 



Heads many-flowered; the flowers all tubular and perfect. Scales of ihtT 

 involucre linear-lanceolate, foliaceous, erect, in one or two rows, nearly equal. 

 Receptacle convex or conical, with narrowly linear rigid chaff among the fl< 

 Lobes of the corolla slender, spreading. Achenia top-shaped, 5-angled. Pap- 

 pus of 5 or 6 mcmbranaccous and pointed chaffy scales. Smooth and low 

 perennials, with alternate and entire 3-nerved leaves, and solitary heads (re- 

 sembling those of a Scabious) terminating the naked summit of the simple stem 

 or branches. Flowers purplish ; the anthers blue. (Named for Humphry 

 Marshall, of Pennsylvania, author of one of the earliest works on the trees and 

 shrubs of this country.) 



