332 FLORA OF TEXAS. 



>**♦ Leaves linear or lanceolate, entire, sessile; radical leaves stipulate-lanceolate, 

 serrate; heads small and numerous, racemM ; scales of theinvolucre in seve- 

 ral rows, rigid, wit/i spreading or recurved green tips. 



A. MULTIFLORUS, Ait. Stem l°-2°, very leafy and miicli 

 branched ; leaves linear, obtuse at each end, often bristly- 

 pointed, spreading or recurved, the upper ones sessile or 

 somewhat amplexicaul ; scales of the involucre broadest at 

 the apex, obtuse or short-pointed ; heads densely racemose 

 on the short and very leafy branches, or sometimes solitary 

 at their summits; rays white; plant whitish-pubescent. 



ERIGERON, L. Fleabai^e. 



Heads mostly hemispherical, many-flowered ; rays very 

 numerous, pistillate ; scales of the involucre nearly equal, 

 in 1-2 rows ; receptacle flat, naked ; achenia compressed ; 

 pajjpus a single row of capillary bristles, or with an outer 

 row of short chaffy scales or bristles. — Herbs; leaves alter- 

 nate ; rays white or purplish. 



* Pappus double. 



E. STRIG0SU3I, Muhl. Annual, rough pubescent; stem 

 slender, corymbose-panicled above ; leaves entire or spar- 

 ingly serrate, the lowest oblong, tapering into a slender pe- 

 tiole, the upper lanceolate or linear, sessile, distant ; Jieads 

 small, corymbose-panicled ; rays white or rose-color ; outer 

 pappus short and chaffy. Stem 2° high. 



- ** Pappus single. 

 t Annual ; rays shorter than the disk. 



E. Canadense, L. Hirsute or smooth; stein much 

 branched ; leaves linear-lanceolate ; Jieads very numerous, 

 in panicled racemes, small, cylindrical; rays white; disk- 

 flowers 4- toothed. Stem l°-3° high. 



