270 COMPOSITES. (( UMl'OSITK FAMILY.) 



SUBORDER II. L ABIATIFIXXR^E. 



TKIBE VI. MUTISIACE^E. Heads ivith the Jiuicers dissimilar or rarely 

 dioecious ; the marginal ones pistillate or neutral, ligulate or bilabiate : style as 

 in Tribe V. 



87. CHAPTALIA, Vent. 



Heads many-flowered, radiate. Kay flowers pistillate, 'in two rows, the 

 outer ones ligulate, the inner ones ligulate or 3 -5-toothed and filiform. Disk 

 flowers perfect but sterile, bilabiate, the outer lip 3-cleft, the inner 2-cleft. 

 Anthers caudate. Scales of the cylindrical involucre lanceolate, acute, imbri- 

 cated in few rows. Receptacle naked. Fertile acheuia oblong, smooth, nar- 

 rowed at each end. Pappus of numerous bristly hairs. Stemless perennial 

 herbs; the simple scape bearing a single head of white or purplish flowers. 

 Leaves smooth above, white tomeutose beneath. 



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

 Feb. - April. Scape tomentose, 6' - 1 2' high. Leaves spatulate-lauceolate or 

 oblong. Heads nodding. 



SUBORDER III. LIGULIFLOK^. 



TRIBE VII. CICHORACE.5C. Style cylindrical above and pubescent, like 

 the rather obtuse branches ; the stuj matte lines terminating beloiv or near the 

 middle of the branches. Plants with milky juice: leaves alternate. 



88. APOGON, Ell. 



Heads 10-20-flowered. Scales of the involucre mostly 8, somewhat in two 

 rows, nearly as long as the corolla, conuiveut in fruit. Receptacle naked. 

 Acheuia ovoid-oblong, terete, ribbed and transversely striate, smooth. Pap- 

 pus none. A low smooth and branching annual, with lanceolate entire or 

 toothed leaves, and single or umbellate heads of yellow flowers, borne on 

 slender peduncles. 



1. A. bumilis, Ell. Florida to South Carolina, April -May. 

 Stem leaves clasping; the uppermost mostly opposite. Plant 6'- 12' high. 



89. KRIGIA, Schreb. 



Heads many-flowered. Scales of the involucre 6-15. Acheuia short, ob- 

 long or top-shaped, obscurely 4-angled, not beaked. Pappus double; th< 

 outer of very small chaffy scales ; the inner of bristles. Perennial or annual 

 nearly smooth herbs, bearing single or umbellate heads of yellow flowers on 

 long peduncles or scapes. Leaves alternate, entire or pinnatifid. 



1. Annual, nearly stemless: scales and bristles of the pappus 5: achenia 

 top-shaped. KRIGIA proper. 



1. K. Virginica, Willd. Proper stem short, simple or forking; scapes 

 at length several, slightly pubescent, elongated in fruit; leaves somewhat 

 glaucous ; the lowest rounded, entire ; the others spatulate-ohlong, pinnatifiu. 

 Dry sandy soil. March -May. Scapes at length 1 high. 



