COMPOSITE. (COMPOSITE FAMILY.) L'..' 



color. Damp soil, Florida, and northward. Sept. Stem 2 -4 high. 

 Flowers purplish. 



6. P. aspera, Michx. Rough-pubescent; stem simple; leaves oval-oh- 

 loug, sharply toothed ; heads erect, clustered, forming a compound \iilc. i,s 

 termiual raceme; involucre of 8 or y hirsute .scales, 1*2- 14-flowered ; jiaj:] us 

 straw-color. Barrens of Tennessee, and northward. Stem 2 c -4 high. 

 Leaves small. Flowers creain-color. 



93. LYGODESMIA, Don. 



Heads 5- 10-flowered. Involucre elongated, cylindrical, of 5-8 linear 

 scales, and a few short exterior ones. Receptacle naked. Achenia linear, 

 elongated, smooth, striate, not narrowed upward. Pappus of copious smooth- 

 isli white hairs in several rows. Perennial smooth herbs, with linear or 

 filiform leaves. Heads solitary. Flowers rose-color. 



1. L. aphylla, DC. Stem simple or forking; lowest leaves filiform, 

 elongated ; the others remote, small, and bract like ; heads showy. Dry 

 sandy pine barrens, Georgia and Florida. April - May. Stem l-2 

 high. 



94. TAEAXACUM, Haller. DANDELION. 



Heads many-flowered. Involucre double ; the exterior of small spreading 

 scales; the interior erect in a single row. Receptacle naked. A cheuia ob- 

 long, ribbed or angled, muricate on the ribs ; the apex abruptly produced 

 into a long beak. Pappus of copious white hairs. Stemless perennial herbs. 

 Scapes hollow, bearing a single head of yellow flowers. Leaves all radical, 

 oblong or lanceolate, entire or pinnatifid. 



1. T. officinale, "Weber. Leaves pinnntifid, the lobes acute, toothed ; 

 heads showy. Damp soil, sparingly naturalized. 



95. PYRRHOPAPPUS, DC. 



Heads many-flowered. Involucre double, of numerous subulate scales ; the 

 inner ones erect and partially united, often with a callous appei.dage :.t the 

 apex. Eeceptacle flat, naked. Achenia oblong, nearly terete, 5 furrowed ; 

 the apex narrowed into a long filiform beak. Pappus of copious soft reddMi 

 or brownish hairs. Smooth annual herbs. Leaves oblong or lanceolate, 

 commonly toothed or pinnatifid. Heads solitary, terminating the naked stem 

 or peduncle-like branches. Flowers yellow. 



1. P. Carolinianus, DC. Stem branching; leaves lanceolate, mostly 

 toothed or pinnatifid ; achenia shorter than the filiform beak. Fields. 

 April - July. Stem 1 - 2 high. 



96. LACTUCA, L. LETTUCE. 



Heads few- or many-flowered. Scales of the cylindrical involucre imbri- 

 cated ; the outer ones short. Receptacle naked. Achenia compressed, smooth, 

 beaked. Pappus of copious short white hairs. Tall biennial herbs, with 

 entire or pinnntifid clasping leaves. Heads paniculate. Flowers white, pur- 

 ple, blue, or yellow. 



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