COMPOSITE. 



245 



scales linear-spatulate, with spreading, green tips. Dry soils, 2 feet high. 

 September. 



6. Erigeron. Heads many-flowered, somewhat hemispherical. 

 Rays narrow, very numerous, pistillate. Disk-flowers perfect. Recep- 

 tacle flat, naked. 



1. E. PHILADELPHICUM (Purple Fleabane}. Hairy ; stem slender, leafy ; 

 leaves thin, oblong, clasping at base, mostly entire ; heads with exceedingly 

 numerous and narrow, reddish-purple, or flesh-colored rays, broadly co- 

 rymbed at the summit of the stem. In fields, 7-3 feet high. June-August. 



2. E. ANNUUM (Daisy Fleabane}. Stem tall, furrowed, rough, pubes- 

 cent, branching ; leaves hairy, closely serrate, the lowest ovate ; upper ones 

 ovate-lanceolate, crowded, acute, tapering at base, sessile, the uppermost 

 lanceolate ; heads large, with very numerous, narrow, and short white rays 

 tinged with purple, corymbose at the summit of the stem. A tall plant, 

 growing as a weed in fields and waste places. Very common. August. 



3. E. CANADENSE (Fleabane). Hairy ; stem erect, furrowed, with 

 numerous short branches ; leaves linear-lanceolate, radical ones incised ; 

 heads very numerous, small, with numerous white rays scarcely longer than 

 the involucre, racemose on the branches. In waste places, 6'-6 feet high. 

 July-October. 



7. Dahlia. Heads many-flowered. Disk-flowers pistillate. In- 

 volucre double. Outer scales, double series. Receptacle chaffy. No 

 pappus. 2f 



D. VARIABILIS. (Dahlia). Stem smooth, green ; leaves pinnate, oppo- 

 site ; leaflets about 5, ovate ; outer involucre reflexed. Very common in 

 cultivation. 



8. Solidago. Heads few or many-flowered. Disk-flowers per- 

 fect. Involucre with imbricated, appressed scales. Receptacle small. 

 Pappus simple, capillary. Achenia nearly round. Heads, with I ex- 

 ception, yellow. it 



1. S. BICOLOR (White-rayed Golden-rod}. Pubescent; stem mostly 

 simple ; leaves oblong, or oblong-lanceolate, acute at each end ; lower ones 

 oval and petiolate, slightly serrate ; heads in numerous, erect, densely flow- 

 ered, axillary, racemose clusters, forming a long, terminal, interrupted spike ; 

 involucre-scales ovate, obtuse ; rays short, pale cream-color, or white, about 

 8 in number. Dry fields and woods. August-September. 



2. S. GIGANTEA (Large Golden-rod}. Stem stout, smooth ; leaves lan- 

 ceolate, nearly or quite smooth on both sides, acuminate, sharply serrate, 

 tapering and entire at base, and ciliate on the margin ; panicles large, with 

 pubescent branches. In low grounds, 4-6 feet high. August-October. 



3. S. ODORA (Spicy Golden-rod). Nearly or quite smooth ; stem slender, 

 erect, or reclined ; leaves linear-lanceolate, entire, shining above, very smooth, 

 fragrant, with pellucid dots ; heads small, with 3-4 rays, in short, spreading 

 racemes, forming rather small, unilateral panicles. July-September. 



