DiPLOPAPPLs. LXXV, COMPOSlTiE. 325 



a spreading panicle of heads Avhich are below the middle size and furnished 

 with snovv-wnite rays. July — Sept. 



41. A. KLEXuosus. Nult. (A. sparsiflorus. Ph.) Few-JUnoercd Mlcr. 



St. branching, slender, llexnoiis, very smooth ; lis. long and succulent, the 

 lower ones sublanccolate-linear, upper ones subulate; branches lealy, 1-flow- 

 ered ; uivo/. scahs lanceolate, acuminate, apprcssed; ratfs numerous, shorter 

 than the involucre. Grows in salt marshes, Mass. to Flor. The whole plant 

 very smooth. If high, with large, purple flowers; disk yellow. Aug. — Oct. 



42. A. MNiFor.irs. (A. subulatus. Mickx.) Sea Aster. 



St. paniculate, much branched from the base; Ivs. long, linear, very acute, 

 the uppermost subulate; invol. cylindric with subulate scales; radical hds. mi- 

 nute. — An annual specie.**, Ibund in .salt marshes, Ma.ss. to Car. Stem 12 — 18' 

 high, very smooth, thick, reddish. Leaves smooth, sessile. The plant is very 

 branching, with numerous short-rayed, small, purple flowers. Aug. 



11. SERICOCARPUS. Nees. 



Gr. anpiKOi, silken, Kapiro;, fruit; from the character of the genus. 



Heads few-flowered; ray-flowers 4 — 6,9; disk-fls. 6 — 10, $; in- 

 volucre oblong, imbricated ; scales appressed, with green, spreading 

 tips ; receptacle alveolate ; acheniuin obconic, very silky ; pappus 

 simple. — % Herbs icltk alternate leaves and close corymbs. Rays white. 



1. S. soLiDAGiNEus. Nccs. (Astcr solidaginoides. Miclix.) 



Smooth; Ivs. linear-lanceolate, obtuse, entire, sessile, obsoletely 3-veined, 

 rough on the margin ; corymb fastigiate ; hds. aggregate, subsessile, 5-rayed • 

 scales obtuse, white, with green tips. — In woods, Can. to La. Not common! 



Stem slender, simple, about 2f high. Leaves smooth, pale green, 1 — 2' by 3 



b". Heads rather small, in a level-topped corymb. Involucre oblong. Scales 

 imbricate, appressed, with con.spicuous green tips. Rays long, white. Jl. Aug. 



2. S. coNYzoiDEs. Nees. (Aster, Willd. Conyza asteroides. Linn.) 

 St. somewhat pubescent, simple, cor)^mbose at top ; Ivs. oval-lanceolate, 



smooth beneath, slighly 3-veined, narrowed at base, acute, the upper ones ses- 

 sile, nearly entire, the lower narrowed into the petiole, serrate ; invot. cylindri- 

 cal, the scales oval, obtuse, appressed, slightly reflexed at summit ; rays 5, short. 

 — Common in woods and thickets, Mass. to Flor. Stems somewhat 5-angled, 

 1 — 2f high. Leaves somewhat fleshy. Ray short, but longer than the disk' 

 white. July, Aug. ' 



12. DIFLOPAPPUS, Cass. 



Gr. JittXoos, double, JraTTros, pappus; from the character. 



Heads many-flowered: ray-fls. about 12, 9; disk-fls. $; involucre 

 imbricate ; receptacle flat, subalveolate ; pappus double, the exterior 



very short, interior copious, capillary ; achenium compressed. % 



Lvs. entire.^ alternate. Rays cyanic. Disk yellow. 



1. D. LiNARHFOLius. Hook. (Astcr Hnariifolius. Linn.) 



St. straight, roughish ; branches 1-flowered, fastigiate ; scales of invol. im- 

 bricate, carinate, as long as the disk ; lis. linear, entire, 1-veined, mucronate 

 carinate, rough, rigid, those of the branches recurved. — A handsome species' 

 in dr\^ woods, along streams, U. S. and Can., rather rare. Stems subsimple^ 

 purplish, about a foot high, decumbent at base. Leaves numerous, rigidly up- 

 right or recurved, obtuse, with a small, mucronate point, pale beneath, shining 

 above. Branchlets near the lop, leafy, each with one rather large and show}^ 

 violet-colored head. Aug. Sept. 



2. D. UMBELLATUs, Hook. (A. amygdaliuus. Michx. A. umbellatus. Ait.) 

 St. smooth, straight, simple; corymb fastigiate; lvs. long, lanceolate, 



smooth, attenuate-acuminate at each end, rough on the margin; invol. scales 

 obtusely lanceolate. — A tall, handsome plant, growing in low grounds, river 

 banks and fields, N. Eng. to La. Stem 3— 4f high (in dry fields but 1—2), 



