400 ORDER LXVIII. COMPOSITE. 



naceous margins ; florets numerous, covered externally with a glandu- 

 lar pubescence. Seeds angular, striate ; receptacle flat. — Pale purple. 

 If. April — May. Middle and upper districts of Car. and Geo. 1 — 2 

 feet. 



3. M. angustifo'lia, (Pursh.) Stem erect, branching, angular, gla 

 brous, or slightly pubescent toward the summit. Leaves long, narrow- 

 lanceolate, glabrous ; the upper ones linear. Flowers solitary, terminal ; 

 involucre with numerous subulate leaves. Corolla pubescent without. 

 Seed angular. — Pale purple. 2{ . May — June. In pine-barrens. 1 — 

 2 feet. 



Sub-tribe VI— ANTHEMIDE'^E. 



Heads mostly heterogarnous ; ray florets pistillate, ligulate, 

 or tubular ; disk florets usually perfect. Pappus small or none. 



Genus LXVIL— AN'THEMIS. L. {Maruta, Cass.) 

 (From anthemon, a flower, in allusion to the great number of flowers.) 



Involucre hemispherical, many-leaved, with leaves nearly 

 equal ; ray florets pistillate ; disk florets perfect. Receptacle 

 chaffy, with the chaff rigid and acuminate. Seed naked. Pap- 

 pus wanting or none. 



1. A. cot'ula, (L.) Stem erect, pubescent, slightly angled, much 

 branched. Leaves bi pinnate, with subulate, 3-parted segments. Flow 

 ers in terminal corymbs ; involucre many-leaved, pubescent ; ray florets 

 10 — 12. Seed slightly angular ; receptacle conic, with subulate chaff. 

 — White. 0. May — June. Moist soils. Very common. 1 — 2 feet. 



{Marutu cotula, D. C.) May-weed. 



Genus LXVIII.— ACHILLE'A. L. 

 (Named after Achilles, a pupil of Chiron.) 



Involucre ovate, imbricate, many-leaved ; ray florets pistil- 

 late, those of the disk perfect. Receptacle chaffy. Pappus 

 none. 



1. A. millefo'ltum, (L.) Stem erect, pubescent, furrowed, branched 

 at the top. Leaves bipinnate, with the segments linear, acute, glabrous. 

 Flowers in dense, terminal corymbs ; involucre with the leaves ovate- 

 lanceolate, pubescent ; ray florets 4 — 5. — White or pale red. If. July 

 — Aug. 1 — 2 feet. Yarrow. 



Genus LXIX.— LETJCAN'THEMTJM. Tourn. 

 (From leukos, white, and anthemon, a flower.) 



Heads many-flowered ; ray florets numerous, pistillate. In- 

 volucre imbricate, broad. Receptacle flat or convex, naked. 

 Achenia of the disk and ray similar. Pappus none. 



1. L. vulga're. Stem erect. Leaves laciniate toothed ; the cauline 

 ones clasping, the radical ones spatulate. — White. 10 — 18 inches. 



Daisy 



