222 LXXVIII. COMPOSITE. (J. D. Hooker.) 



Shrubs or tindershrubs. Invol. bracts broad. Pappus copious 28. PLUCHEA. 

 A small rigid herb. Heads sessile. Corolla of fl. 2-lipped. 



Pappus 29. NANOTHAMNTTS. 



Erect or diffuse herbs. Corolla of $ fl. tubular. Pappus . 30. EPALTES. 



** Heads in dense, globose or ovoid masses. Corolla of $ fi.jtiiform. 



Herbs with winged stems. Pappus 31. SPH^RANTHUS. 



Herbs with winged stems. Pappus hairs slender .... 32. PTEROCAULON. 



JSubtribe 2. FILAGINE.S:. Heads androgynous, often in dense clusters. Ray- 

 flowers $ , filiform, numerous, often enclosed in the long outer scales of the recep- 

 tacle ; diskrflowers $ , central, with undivided styles, or, if divided with the arms, 

 obtuse or subulate, not truncate. Invol. bracts scarious or hyaline, rarely 

 radiating. 



* Achenes large, 2-4-angled, or many-ribbed, ciliated. 



Glabrous shrubs or undershrubs. Pappus hairs many, short, 



unequal 33. BLEPHARISPERMUM, 



Glabrous or woolly herbs. Pappus bristles very short, con- 

 nate into a fimbriate ring 34. ATHBOISMA. 



** Achenes small, not ribbed. Small woolly herbs. 



Pappus hairs simple 35. FILAGO. 



Pappus hairs plumose 36. IFLOGA. 



Subtribe 3. GNAPHALIE^E. Heads androgynous or homogamous. Invol. 

 bracts scarious, usually hyaline, or the inner radiating. Receptacle, usually naked. 

 Style-arms of $ fl. truncate. 



* Fl. > all sterile, with undivided or merely notched styles. Inner invol. bracts 

 often radiating. Heads often unisexual. 



Heads corymbose, always difficious. Pappus hairs connate at 



the base 37. ANTENNARIA. 



Heads glomerate, involucrate. Pappus hairs subconnate at 



the base 38. LEONTOPODIUM. 



Heads corymbose. Pappus hairs quite free 39. ANAPHALIS. 



** Fl. Q all, or mostly fertile, with divided styles. 



Pappus hairs plumose. Minute herb 40. LASIOPOGON. 



Anther-cells obtuse or apiculate (without tails} 41. PHAGNALON. 



Fl. ? 2-oo -seriate. Pappus hairs never barbellate .... 42. GNAPHALIUM. 



Fl. $ 1-, rarely 2-seriate. Pappus hairs various 43. HELICHRYSUM. 



Subtribe 4. ANGI ANTHER. Heads homogamous, discoid, small, in crowded 

 clusters. Invol. bracts few, hyaline. Fl. $ with truncate style-arms. 

 Heads 1-flowered in a leafy involucre. Pappus .... 44. CJESUUA. 



Subtribe 5. EUINTJLE^;. Heads heterogamous, radiate, rarely subdisciform 

 or homogamous. Flowers usually all fertile. Receptacle naked. Fl. with 

 linear style-arms, rounded or dilated at the top. 



Heads rayed. Pappus hairs few or many, subequal . . . .45. INULA. 

 Heads usually rayed. Achenes hardly ribbed. Pappus hairs 



slender, of ray few or 46. VICOA. 



Heads rayed or discoid. Achenes ribbed. Outer pappus 



of scales, inner of hairs 47. PULICARIA. 



Heads discoid. Achenes slender, striate, beaked. Pappus 48. CARPESIUM. 



TRIBE V. Helianthoideee. Heads usually radiate. Receptacle palea- 

 ceous. Anther-cells not produced into tails. Style-arms truncate or appendicu- 



