COMPOSTT.E. (composite FAMILY.) 237 



glabrous. Pappus of 2 - 8 rigid deciduous awns or bristles. — Perennial herbs, 

 with alternate leaves, and single heads of yellow flowers terminating the 

 branches. 



1. G. laneeolata, Nutt. Glabrous, corymbosely branching (l°-2° high) ; 

 leaves luiiceulate, sessile, sharply serrate ; involucre glutinous, the scales 

 nearly e([ual, ending in a filiform point , bristles of the pappus mostly 2. — 

 Tennessee, Alabama, and westward. 



26. AMPHIACHYRIS, Nutt. 



Heads small, radiate. Eays pistillate, fertile. Disk flowers perfect but 

 sterile. Scales of the top-shaped involucre few and rigid. Pappus of the 

 disk flowers of 5 - 8 bristle-like scales ; of the rays minute or obsolete. — A 

 low much branched glabrous annual, with linear alternate leaves and yellow 

 pedicellate flowers. 



1. A. dracuneuloid.es, Nutt. — Colbert County, Alabama (Mohr), 

 and westward. August. 



27. BACCHARIS, L. 



Heads dioecious, many-flowered ; the flowers all tubular. Corolla of the 

 sterile flowers 5-cleft; of the fertile flliform, nearly entire; style exserted. 

 Scales of tiie oblong or hemispherical involucre imbricated in several rows. 

 Receptacle naked or somewhat chaffy. Achenia ribbed. Pappus of the ster- 

 ile flowers capillary, in a single row, as long as the involucre ; of the fertile 

 flowers in 1 -several rows, commonly much longer than the involucre. — 

 Smooth and resinous shrubs. Leaves alternate. Flowers white. 



1 . B. halimifolia, L. Leaves obovate, or oblong-obovate, toothed above 

 the middle, the uppermost lanceolate, entire ; heads peduncled, the terminal 

 ones clustered; pappus of the fertile flowers 3-4 times as long as the invo- 

 lucre. — Low ground near the coast. Sept. - Oct. — Shrub 2°- 12° high. 



2. B. glomeruliflora, Pers. Leaves wedge obovate, coarsely toothed, 

 rigid ; the uppermost obovate, entire ; heads very numerous, in dense sessile 

 axillary clusters ; pappus of the fertile flowers twice as long as the involucre. 

 — Swamps along the coast, Florida to North Carolina. Nov. — Shrub 6°- 

 12= high. 



3. B. angUStifolia, Michx. Leaves linear, entire ; heads single, or 2- 

 4 in a terminal cluster; achenia smooth. — Saline marshes, Florida to North 

 Carolina. Oct. — Shrub 4° -3° high. Heads small. 



28. INULA, L. Elecampane. 



Heads many-flowered. Rays pistillate. Scales of the involucre imbricated 

 in several rows. Receptacle flat or convex, naked. Anthers bicaudate at the 

 base. Pappus single, of capillary slightly scabrous bristles. — Perennial 

 herbs. Flowers yellow. 



1. I. Helenium, L. Stem stout; leaves large, ovate, denticulate, to- 

 mentose beneath ; the lowest ones petioled, the upper clasping ; heads very 



