184 COMPOSITE. (COMPOSITE FAMILY.) 



1. F. radiata, Miehx. Leaves oblong, the upper ones clasping and toothed 

 at the base ; fruit mostly downy, ovoid, with a farrow between the parallel and 



contiguous empty cells; flowers white. — River-banks, Florida, and northward. 

 February and March. — Stem 6' - 12' high. 



Order 72. COMPOSIT7E. (Composite Family.) 



Flowers clustered in a dense head upon a common receptacle, and sur- 

 rounded by an involucre. Calyx united with the ovary; the limb (pop- 

 pus) either obsolete, or forming a eup-like or toothed border, or divided 

 into chaffy scales or bristles. Corolla superior, flat or funnel-shaped, 5- 

 (rarely 4-) lobed, valvate in the bud. Stamens alternate with the lobeti 

 of the corolla, and inserted into its tube: anthers cohering in a cylinder 

 (syngenesious). Style single: stigmas 2. Fruit (achenium) dry and seedrl 

 like. Seed solitary, erect, without albumen. Radicle inferior. — Herbs 

 or shrubs. Leaves without stipules. Involucre composed of short or leafy 

 bracts (scales of the involucre), arranged in 1-inany series. Receptacle 

 naked, or furnished with scales (chaff'//). Heads with the flowers all tubu- 

 lar (discoid), or all strap-shaped, or the marginal ones strap-shaped or 

 ligulate (radiate). 



Artificial Synopsis of the Genera. 



Suborder I. TUBULIFLOR^E. Corolla of the perfect flowers 

 tubular, equally 5- (rarely 3-4-) lobed. Ray-flowers, when present, 

 ligulate, either pistillate or neutral. 



§ 1. Heads discoid. 

 * Heads with the flowers all perfect. No. 



Pappus none. Leaves resinous-dotted. Flowers yellow. . . . FLAVEU1A. 65 



Pappus bristly or hairy. 

 Flowers yellow. 



Receptacle pointed BIGKI.OVIA. 21 



Receptacle flat. Nos. 1 & 33 iu BOUDAOO. 20 



Receptacle convex. RUGELIA. T."> 



Flowers white, blue, or purple. 

 Receptacle chafly. 



Leaves opposite. Flowers white Ml'.l.ANTHKItA. •(() 



Leaves alternate. Flowers purple CARPHJSPHORCS. 



K. .-. p| u I,- | .. 



Leaves spiny CTR8ITJM, 7s 



Leaves not spiny, cordate LAPPA. 79 



Receptacle oat i i 



Se.,|.- ,,f tlie involucre in a single row 0A0ALIA. 78 



I lie invuliK re in '2 nr more rows. 



Pappaa doable, the onter row very short \i:i;\n\i\. i 



1 '.' 1 1 ; 

 ' Aeii.nia ribbed or itrlate. 



Pappus plumose. Flowers cream -colored i\in\i\. 1Q 



Pappn i ordate BBXOB I i.i.i a. 11 



Pappus scabrous. Leaves not cordate liatius. n 



