CAEDUACEAE. 191 



Involucres broad, many-floT;\ere(l : bracts narrow, the inner broader than the 

 outer ones. Ray-Howers numerous: corollas with a slender tube and a narrow 

 pink, violet, purple, or white ligule. Disk-corollas with a funnelform throat 

 and a usually shorter tube: lobes deltoid. Anthers as long as the filaments or 

 longer. Stigmas short. Pappus of numerous capillary bristles. — Fleabane. 



Plants annual : llgules over 6 mm. long: bracts of the involucre about twice as long 

 as the disk-corolas. ]. E. annuus. 



Plants perennial: ligules less than 5.5 mm. long: inner br.ncts 



of the involucre slightly longer than the disk-corollas. 2. E. quercifoUua. 



1. E. annuus (L.) Pers. Stems 3-12 dm. tall, hirsute or glabrate: blades of 

 the basal leaves oval, oblong, or ovate, coarsely toothed or incised : bracts of 

 the involucre with few long hairs: ligules of the ray pink, purplish, or rarely 

 white. — Pinelands.- — {Ber. ) 



2. E. quercifolius Lam. Stems 1-7 dm. tall, pubescent : blades of the basal 

 leaves spatulate, oblanceolate, or oblong, pinnatifid or sinuate-pinnatifid: 

 involucres manifestly pubescent; inner bracts prolonged into slender tips: 

 ray-flowers numerous: disk-corollas 3.5-4 mm. long. — Everglades and pine- 

 lands. — {Bah.) 



16. LEPTILON Raf. Herbs. Leaves alternate: blades narrow, entire or 

 sparingly toothed. Heads several or numerous, inconspicuously radiate or 

 discoid. Involucre usually eampanulate, few-flowered: bracts very narrow, the 

 inner much longer than the outer ones. Ray-flowers few: corollas with a very 

 slender tube and a minute ligule. Disk-corollas with a eampanulate or a 

 cylindraceous throat and a long tube: lobes deltoid. Pappus of many brittle 

 capillary bristles, in 1 series. 



1. L. canadense (L.) Britton. Stems 3-20 dm. tall, paniculate above, glabrate 

 or sparsely hirsute : leaf-blades spatulate to linear or nearly so, ciliate near the 

 ba?e: larger bracts of the involucre 3-3.5 mm. long: disk-corollas 2.5-3 mm. 

 long. — Pinelands, hammocks, coastal sand-dunes and waste places. — F, K. 

 {Ber., Bull., Cuba, Ani.) — Horse-weed. Butter-weed. 



17. BACCHAEIS L. Shrubs. Leaves alternate: blades leathery, entire 

 or toothed. Heads dioecious, often clustered, discoid. Involucres ovoid to 

 eampanulate, many-flowered: bracts of the staminate involucre smaller than 

 those of the jjistillate. Corollas various, those of the staminate with a funnel- 

 form throat and a long tube, the lobes lanceolate : those of the pistillate flowers 

 filiform. Pappus of the staminate flowers shorter than that of the pistillate. 

 — Groundsel-tree. 



Leaf-blades broadest above the micldle. 



Leaf-blades entire. 1. B. dioica. 

 Leaf-blades toothed. 



Inner bracts of the pistillate involucres acute. 2. /?. hnlimifolia. 



Inner bracts of the pistillate involucres obtuse. 3. B. glomrruliflora. 



Leaf-blades linear. 4. B. angusiifoHa. 



1. B. dioica Vahl. Shrub 8-25 dm. tall: leaf -blades spatulate, often broadly 

 so, to obovate-spatulate, 1-3 cm. long: pistillate involucres with ovate-obtuse 

 outer bracts and linear-lanceolate acuminate inner bracts. — Coastal hammocks 

 below Miami. — {Bah., Cuba, Ant.) 



2. B. halimifolia L. Plants 9-40 dm. tall, resinous: leaf -blades suborbicular 

 to oblong or linear-elliptic, some of them, at least, coarsely toothed: pistillate 

 involucres about 6 mm. long; inner bracts linear. — Coastal hammocks and 

 sand-dunes. — F. K. {Bah.) 



