CAKDUACEAE. 149 



Leaf-blades short, adnate to the stem and branches : Hgules violet. 1. A. adnatus. 

 Leaf-blades long, not adnate : ligules pale, white to pale-lilac. 



Leaf -blades toothed : ray-flowers numerous. 2. A. Inconspicuus. 



Leaf -blades entire : ray-flowers few. 3. A. Bracei. 



1. A. adnatus Xutt. Stem and branches erect or ascending, 2-8 dm. tall, 

 hispidulous: upper leaves scale-like, appressed; blades oblong, lanceolate, or 

 ovate, scabrous, sessile and partially adnate to the adjacent internodes: heads 

 scattered: involucres campanulate; bracts scabrous, the inner ones linear: 

 ligules violet, 7-10 mm. long. Pinelands, L. keys. [E. K.] (Bah.) 



2. A. inconspicuus Less. Plants annual, glabrous or obscurely glandular in 

 the inflorescence, mostly 1 m. tall or less, rather copiously branched above: 

 cauline leaves mostly 1-1.5 dm. long; blades elliptic to oblong, varying to 

 broadest above or below the middle, acute, shallowly toothed, those of the 

 branches much narrower: heads much smaller than those of A. Braeei: invo- 

 lucre campanulate, 3.5-5 mm. high; bracts linear-lanceolate to narrowly linear: 

 ray-flowers 20-30, more numerous than the disk-flowers; ligules mostly pale 

 lilac, about 2 mm. long Sandy places, Key West. (Cuba, Ant.) 



3. A. Bracei Britton. Plants perennial 2-9 dm. tall: upper leaves more or 

 less spreading; blades narrowly linear to linear-subulate: heads corymbose: 

 involucres campanulate-turbinate ; bracts stout, the inner ones not reaching to 

 the top of the disk. Low hammocks, L. keys. [E. K.] (Bah., Cuba.) 



9. LEPTILON Eaf. Herbs. Leaves alternate: blades narrow, entire or 

 sparingly toothed. Heads several or numerous, inconspicuously radiate or 

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

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

 slender tube and a minute ligule. Disk-corollas with a campanulate 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 

 base: larger bracts of the involucre 3-3.5 mm. long: disk-corollas 2.5-3 mm. 

 long. Hammocks and waste grounds, L. keys. [E. K.] (Ber., Bah., Cuba, 

 Ant.) HORSE-WEED. BUTTER-WEED. 



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

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

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

 those of the pistillate. 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 broad, coarsely toothed : inner bracts of the pistillate involucre acute or 

 acuminate. 1- B. halimifolia. 



Leaf-blades linear, entire or nearly so : inner bracts of the pistil- 

 late involucre obtuse or acutish. 2. B. angustifolia. 



1. 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, L. keys. [E. K.] (Bah.) 



2. B. angustifolia Miehx. Plants 5-25 dm. tall, resinous: leaf -blades nar- 

 rowly linear, 1-8 cm. long, entire or nearly so: pistillate involucres 4-5 mm. 

 long; inner bracts oblong. Hammocks and sand-dunes, U. S. keys. [E. K.] 

 -(Bah.) 



