132 CAKDUACEAE. 



ments. Stigmas lanceolate. Pappus of 1 or 2 series -of brownish capillary 

 bristles. 



1. C. pauciflosculosa (Michx.) Greene. Stems 3-9 dm. tall: leaf -blades linear- 

 spatulate to linear-oblong, 3-6 cm. long: involucres 4-6 mm. long, the inner 

 bracts linear-lanceolate: ligules of the ray-corollas 4-6 mm. long: achenes 

 3-4 mm. long. 



Sandy shores and banks, n. Fla. (Cont. ) 



5. BACCHAK1S 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. 

 Leaf-blades broadest above the middle. 



Leaf-blades entire. 1. B. dioica. 



Leaf-blades toothed. 



Inner bracts of the pistillate involucres acute : heads in 



peduncled panicled clusters. 2. B. halimifoUa. 



Inner bracts of the pistillate involucres obtuse : heads 



in sessile or nearly sessile axillary clusters. 3. B. glomeruliflora. 



Leaf-blades linear. 4. B. angustifolia. 



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, E. Keys. (W. I.) 



2. B. halimifolia L. Shrub 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. GROUNDSEL-TREE. 



Coastal hammocks and sand-dunes, nearly throughout Fla. (Cont., W. I.) 



3. B. glomeruliflora Pers. Shrub 8-30 dm. tall, barely resinous: leaf -blades 

 spatulate to cuneate-obovate, 2-5 cm. long, often sharply toothed: pistillate 

 involucres 5-6 mm. long; inner bracts oblong-spatulate. 



Hammocks, nearly throughout n. and pen. Fla. (Cont., W. I.) 



4. B. angustifolia Michx. Shrub 5-25 dm. tall, resinous: leaf -blades narrowly 

 linear, 18 cm. long, entire or nearly so: pistillate involucres 45 mm. long; 

 inner bracts oblong. 



Hammocks and sand-dunes, nearly throughout Fla. (Cont., W. I.) 



