352 COMPOSITE. DiPLopAPPus. 



5. p. 274. Aster divaricatus, Linn. sp. 2, p. 873. A. cornifolius, Muhl, in Willd. sp. 3. 

 p. 2039 ; Bigel. ft. Bost. p. 313. A. infirmus, Michx. fi. 2. p. 109. A. humilis, Pursh, 

 fl. 2. p. 548 (excl. syn. Willd.); Beck, bot. p. 188. 



Stem 1^-2 feet high, terete, often flexuous. Leaves 3-4 inches long and 1-2 wide, 

 ciHolate, the reticulated veins rather prominent underneath ; lower ones often spatulate ; those 

 on the upper part of the stem distant. Heads middle-sized, usually few (seldom more than 

 8 or 10) ; the peduncles rather rigid. Rays broadly lanceolate, white or somewhat ochro- 

 leucous. Scales of the involucre oblong-lanceolate, obtuse, ciliate-pubescent on the margin ; 

 the inner ones about one-third shorter than the disk, the exterior very short. Appendages of 

 the style linear-subulate, elongated. Achenia large, obovoid, compressed, 6 - 8-nerved. 

 Pappus reddish-brown ; most of the longer bristles distinctly clavate, and often a little curved 

 at the tip. 



Woods and copses ; rather rare. August - September. 



3. DiPLoPAPPUs uMBELLATus, ToTT. Sf Gt. Umhelkd Diplopa^ppus. 



Stem striate, fastigiate-corymbose at the summit ; leaves elongated, lanceolate, attenuate- 

 acuminate, tapering at the base usually into a short petiole, the margin a little rough ; heads 

 numerous, in fastigiate corymbs ; scales of the short involucre obtusish, rather closely im- 

 bricated ; achenia slightly hairy. — Torr. ^ Gr. fl. N. Am. 2. p. 183. D. umbellatus and 

 amygdalinus. Hook. fl. Bor.-Am. 2. p. 23. D. amygdalinus, Darlingt. fl. Cest. p. 473. 

 Dcellingeria umbellata, Neest, Ast. p. 178. Diplostephium umbellatum, DC.prodr. 5. p. 212. 

 Aster umbellatus. Ait. Kew. (ed. 1.) 3. p. 199 ; Willd. sp. 3. p. 2030 ; Bigel. fl. Bost. p. 310. 

 A. amygdalinus, Michx. fl. 2. p. 109 ; Pursh, fl. 2. p. 549 ; Ell. sk. 2. p. 367 (partly) ; 

 Torr, compend. p. 300; Beck, bot. p. 188 ; Lindl. bot. reg. t. 1517. 



Stem 3-5 feet high, often clustered ; the corymbose branches rather erect. Leaves 3-5 

 inches long and from half an inch to an inch wide, a little rough above, somewhat pubescent 

 on the veins underneath. Heads above the middle size, numerous, in a somewhat crowded 

 fastigiate corymb. Scales of the involucre a little longer than the ripe achenia. Rays about 

 12, white or cream-color. Achenia obovoid-oblong, prominently about 5-ribbed. Pappus 

 tawny ; the longer series slightly thickened at the tip. 



Wet meadows and moist thickets ; rather common. August - September. 



