248 COMPOSITE, (composite family.) 



natifid ; scales of the involucre cuspidate, viscid, not webby ; (lowers purple. — 

 Fine-barren swamps, Florida, Georgia, and westward. July and Aug. — Stem 

 2° - 3° high, rigid. Heads 1' in diameter. 



8. C. repandum, Michx. Webby throughout when young ; stem simple, 

 very leafy ; leaves ohlong-linear, clasping, the margins undulate and clo.-dy 

 fringed with bristly spines ; heads mostly solitary ; flowers purple. — Dry pine 

 barrens, Florida to North Carolina. June and July. — Stem 1° - 2° high. 



9. C. horridulum, Michx. Webby when young, at length smoothish ; 

 stem thick, branching; leaves clasping, pinnatifid, armed with long and stout 

 spines ; heads large, surrounded by a whorl of linear pectinate spiny bracts ; 

 scales of the involucre linear-subulate, spine-pointed ; flowers purple or yellow- 

 ish. — Sandy soil, Florida, and northward. April and May. — Stem l°-3° 

 high, often purple. 



79. LAPPA, Toum. Burdock. 



Heads many-flowered, discoid ; the flowers all perfect and similar. Scales of 

 the globose involucre imbricated, coriaceous, with subulate spreading hooked 

 tips. Receptacle flat, bristly. Achenia oblong, compressed, transversely rugose. 

 Pappus of numerous short caducous bristles. Anthers caudate at the base. — 

 Biennial branching herbs, with large cordate pctiolcd haves. Heads small. 

 Flowers purple or white. 



1. L. major, Gacrt. Leaves undulate on the margins, pubescent beneath; 

 the uppermost ovate ; heads corymbose ; involucre smooth or webby. — Waste 

 places, North Carolina. Introduced from Europe. 



Suborder II. L.ABIATIFLORJE. 



Tribe VI. MUTISIACEiE. Heads with the Jlowers dissimilar or rarely dicc- 

 cious ; the marginal ones pistillate or neutral, li<julate or bilabiate : style as in 

 Tribe V. 



80. CHAPTALIA, Vent. 



Heads many-flowered, radiate. Bay-flowers pistillate, in two rows, the outer 

 one-; ligulate, the inner ones lignlate or 3 - . r >-toothcd and filiform. ] b.-k flowers 



perfeel but sterile, bilabiate, the outer lip 3-cleft, the inner 2-cleft. Ambers cau- 

 date. Scales of the cylindrical involucre lanceolate, acute, imbricated in few 

 rows. Receptacle naked. Fertile achenia oblong, smooth, narrowed al each end. 

 Pappus of numerous bristly hairs. — Stemless perennial herbs ; the simple Boape 

 bearing a single head of white or purplish dowers. Leaves smooth above, white 

 tomentose beneath. 



1. C. tomentOSa, Vent. — Low pine barrens, Florida to North Carolina. 

 Feb.. —April • — Scape lomeutosc, G'-12' high. Leaves spatulate-hme, nlaie or 



oblong. Heads nodding! 



