206 



COMPOSITE. (COMPOSITE FAMILY.) 



Receptacle flat. 



Leaves lobed, alternate ACHILLEA. 



Leaves lobed, opposite WEDEL1A. 



Leaves not lobed. Pappus 2-awued VERBESINA. 



Leaves not lobed. Pappus none ECLIPTA. 



Flowers of the disk sterile. 



Rays yellow. Pappus none POLYMNIA. 



Rays yellow. Pappus none. Achenia prickly . . ACANTHOSPERMUM. 



Rays yellow. Pappus a toothed crown CHRYSOGONUM. 



Rays yellow. Pappus 2-toothed or awned. Achenia winged . . SILPHIUM. 

 Rays yellow. Pappus 2-toothed or awned. Acheuia wingless BERLANDIERA. 

 Rays yellow. Pappus 2-toothed. Achenia wingless . . LINDHEIMERIA. 

 Rays yellow. Pappus of the rays none, of the disk flowers bristle-like scales. 



AMPHIACHYRIS. 



Rays white. Receptacle conical PARTHENIUM. 



Rays neutral (without pistils). 

 Receptacle naked or nearly so. 



Achenia villous. Pappus scaly, loug-awned GAILLARDIA. 



Achenia smooth or the angles hairy. Pappus awuless . . LEPTOPODA. 

 Receptacle deeply pitted. 

 Margins of the pits entire. Perennial .... 



Margins of the pits toothed. Annual 



Receptacle chaffy throughout. 

 Involucre double. Pappus 2 - 4-awned. 



Awns of the pappus hispid upward .... 

 Awns of the pappus hispid downward. Achenia beakless 

 Awus of the pappvis hispid downward. Achenia beaked 

 Involucre simple or imbricate. 

 Pappus a cup-shaped border. 



Chaff of the receptacle elongated, spine-pointed . 

 Chaff of the receptacle not elongated nor spine-pointed 



Pappus none. Achenia not angled 



Pappus 2 - 4-awned. 



Achenia winged. Leaves divided. Receptacle elongated 

 Achenia winged. Leaves undivided. Receptacle convex 

 Achenia wingless. Awns of the pappus deciduous . 

 Achenia wingless. Awns of the pappus persistent 

 Receptacle chaffy at the apex. Achenia ribbed . 



. BALDWINIA. 



ACTINOSPERMUM. 



COREOPSIS. 

 BIDENS. 

 COSMOS. 



ECHINACEA. 



. RUDBECKIA. 



. GYMNOLOMIA. 



LEPACHYS. 



, ACTINOMERIS. 



HELIANTHUS. 



HELIANTHELLA. 



ANTHEMIS. 



No 

 75 



40 

 58 

 44 



34 

 35 

 30 

 37 

 38 

 39 



20 

 40 



70 

 71 



03 

 04 



CO 

 02 

 01 



52 

 53 



54 

 f,9 

 50 

 57 

 74 



SUBORDER II. LABIATIFLOR^E. Corolla of the perfect flowers 2- 

 lipped ; the outer lip 3-lobed, the inner 2-lobed. 



Herb stemless. Scape 1-flowered. Flower nodding .... CHAPTALIA. 87 



SUBORDER III. LIGULIFLOR^J. Corolla of all the flowers ligulate. 



Pappus none. Achenia many-ribbed APOGON. 



Pappus scaly. Flowers blue CICHORIUM. 



P.ippus scaly and bristly. 

 Scales of the pappus 5, with 5 intermediate bristles . . . . ( KRIGIA. 



Scales of the pappus and bristles numerous ( CYNTHIA. 



Pappus hairy. 

 Pappus tawny or dirty white. 



Flowers erect, rose-color. Leaves filiform LYGODESMIA. 



Flowers erect, yellow. Achenia beakless HIERACIUM. 



Flowers erect, yellow. Achenia long-beaked . . . PYRRHO PAPPUS. 

 Flowers nodding, whitish or purplish PRENANTHES. 



88 

 89 



89 



93 

 91 

 95 

 92 



