COMPOSITE. (COMPOSITE FAMILY.) 1*79 



«- +> Receptacle chaffy. 

 Rays neutral (rarely pistillate but sterile) ; the disk-flowers perfect and fertile. 

 Receptacle elevated (varying from strongly convex to columnar), and 



Chaffy only at the summit ; the chaff deciduous Pappus none. . No. 61. 



Chaffy throughout. Achenia flattened laterally if at all. . 36-40. 



Receptacle flat. Achenia flattened parallel with the scales or chaff. . 41, 42. 



Rays pistillate and fertile ; the disk-flowers also perfect and fertile. 



Achenia much flattened laterally, 1 -2-awned. 43. 



Achenia flattened parallel with the scales and chaff. Pappus none. ... 63. 



Achenia 3-4-angular. terete or laterally flattish, awnless. 



Receptacle convex or conical. Leaves alternate, dissected. .... 62. 

 Receptacle conical Leaves opposite, simple. 



Achenia obovoid Involucre a leafy cup. 33. 



Achenia 4-angular. Involucre of separate scales 35. 



Receptacle fl;it Leaves opposite and simple. 33, 34. 



Rays pistillate and fertile : the disk-flowers staminate and sterile (pistil imperfect j. 



Receptacle chaffy 25-28. 



Systematic Synopsis. 



Tbibe I. VERSiONIACE^l. Heads discoid ; the flowers all alike, perfect and tubu- 

 lar. Branches of the style long and slender, terete, thread-shaped, minutely bristly- 

 hairy all over. — Leaves alternate or scattered. 



1. VERNON! A. Ileads several - many -flowered, separate. Involucre of many scales. Pap- 



pus of many capillary bristles. 



2. ELEPIIANTOPUS. Ileads 3-5-flowered, crowded into a compound head. Involucre of 



8 scales. Pappus of several chaffy bristles. 



Tribe II. EUPATORIACEJE. Ileads discoid, the flowers all alike, perfect and tu- 

 bular; or in a few cases dissimilar, and tho outer ones ligulate. Branches of the style 

 thickened upwards or club-shaped, obtuse, flattish, uniformly minutely pubescent ; the 

 stigmatic lines indistinct. 



Subtribe 1. Eupatorie.£. Flowers all perfect and tubular, never truly yellow. 



* Pappus a row of hard scales. 



8. SCLEROLEPIS. Head many-flowered. Scales of the involucre equal. Leaves whorled. 



* * Pappus of slender bristles. 



4. LIATRIS. Achenia many -ribbed. Bristles of the pappus plumose or barbellate. Corol- 

 las red-purple, 5-lobed. 



6. KOHNIA. Achenia many-ribbed. Bristles of the pappus very strongly plumose. Corollas 

 whitish, o-toothed. 



6. EUPATORIUM. Achenia o-angled. Bristles of the pappus roughish Scales of the invo- 



lucre many or several. Receptacle of the flowers flat 



7. MIKANIA Achenia and pappus as No. 6. Scales of the involucre and flowers only 4 



8. CONOCLIN1UM. Achenia, pappus, &c. as No. 6 Receptacle conical 



Subtribe 2. Tcssilagine.e. Flowers (sometimes yellow) more or less monoecious or dioecious 

 at least of 2 sorts in the same head. 



» Outer flowers of each (many-flowered) head pistillate and ligulate. Scape leafless 



9. NARDOSMIA. Heads corymbed. Flowers somewhat dioecious. Pappus capillary. 



10 TUSSILAGO. Head single ; the outer pistillate flowers in many rows Pappus capillarv 



* * Flowers all tubular. Stem leafy. 



11. ADENOCAULON. Head few-flowered ; the outer flowers pistillate. Pappus none. 



« 



Tribe HI. ASTEROIDEJE. Heads discoid, with the flowers all alike and tubrnar ; or 

 radiate, the outer ones ligulate and pistillate Branches of the stylo in the peifcct flow- 



