2-12 COMPOSIT^E. (COMTOSITE FAMILY.) 



65. ACHILLEA, L. Yarrow. 



Heads many-flowered ; the rays pistillate, few and short. Scales of the invo- 

 lucre imbricated. Receptacle Hat or elongated, chaffy. Achenia oblong, com- 

 pressed, margined. Pappus none. — Perennial herbs. Leaves alternate, com- 

 monly pinnatelv divided. Heads small, corymbose. 



1. A. millefolium, L. Stems (1° high) simple, pubescent, tufted; leaves 

 lanceolate, bipinnatifld, the divisions linear, 8-5-cleft; corymbs dense, compound ; 

 rays 4-5, white. — Old fields and around dwellings. Introduced. May- Sept. 



66. LEUCANTHEMUM, Tourn. Ox-eye Daisy. 



Heads many-flowered ; the rays numerous, pistillate. Scales of the involucre 

 imbricated, broad, rounded, with scarious margins. Receptacle flat or convex, 

 naked. Achenia nearly terete. Pappus none. — Perennial herbs. Leaves alter- 

 nate, toothed or pinnatifid. Heads solitary, terminating the stem or branches. 

 Rays white. 



1. L. VUlgare, Lam. Stem (6'- 12' high) simple, naked above; leaves 

 pinnatifid; the lowest spatulate-obovate ; the upper lanceolate; heads showy. 

 (Chrysanthemum Leucanthemum, L.) — Fields. Introduced. May and June. 



67. TANACETUM, L. Tahsy. 



Heads many-flowered, discoid ; the flowers all fertile ; the marginal ones chiefly 

 pistillate, 3-5-tOOthed. Scales of the involucre imbricated, dry. Receptacle 

 convex, naked. Achenia angled or ribbed. Pappus a narrow border, or none. 

 — Herbs with alternate dissected leaves, and solitary or corymbose heads of 

 yellow flowers. 



1. T. vulgare, L. Stem smooth, erect; leaves bipinnately divided, the 

 lobes serrate; heads corymbose, numerous; pappus 5-lobcd. — Common in 

 gardens, and sparingly naturalized in North Carolina. ]J. — Stem 1°- 2° high. 



68. ARTEMISIA, L. Wormwood. 



Beads few- or many-flowered, discoid j the central flowers perfect, 5-toothed 



(sometimes abortive), the marginal ones pistillate, .'(-toothed. Scales of the in- 

 volucre imbricated, mostly with Bcarious margins. Receptacle convex, naked 

 or villous. Achenia obovoid. Pappus none. — Aromatic herbs Or shrnbs. 

 I.' aves alternate, pinnatelv divided. Heads small, in panieled spikes or racemes. 

 1. A. Caildata, Michx. Smooth; stem Blender, branching; lowest leaves 



2 -8-pinnately divided, the upper ones pinnate, with the di\ isions filiform ; heads 

 globular, in small racemes, forming as elongated panicle. — Dry open woods, 

 Weal Florida, and northward. Sept. @ — Stem 2°-G° high. Receptacle 

 naked. Disk-flowers abortive. 



69. SOLIVA, Ruiz ft Pavon. 



Beads many-flowered, monoecious ; the fertile flowers in several rows, apeta- 



lous or nearly so . the Btaminate f w in the centre, with a " 6 toothed corolla. 



