OEDEE LXIV. COMPOSITE — COMPOSITE-FAMILT. 



167 



beads large, with numerous, deep-purple rays, somewhat panieulately corym- 

 bose ; involucre-scales linear-lanceolate, longer than the disk, mostly in a single 

 TOW, viscid-pnbescent, as well as the branchlets. A very ornamental species in 

 moist grounds, not very common in N. Eng., but abundant westward. Sep, 



9. A. miser. Starved Aster, 



Stem more or less pubescent, generally very branching ; leaves lanceolate, 

 or oblong-lanceolate, tapering at base, acuminate, acutely serrate in the middle; 

 heads small, racemose on the branches, oftea scattered; rays very short, bluish 

 or white ; involucre-scales linear, acute, or somewhat obtuse, in 8—4 rows. A 

 very common and extremely variable species, in thickefa and fields, varying in 

 size according to the soil, 8'— 30'. Sep,— Oct. 



10. A. Tradescantl. Narrow-leaved Aster. 



Nearly or quite smooth ; stem terete, with virgate, erect, spreading or di- 

 verging branches; leaves linear-lanceolate, the lower ones commonly serrate 

 In the middle, the others entire; heads very numerous, rather small, mostly 

 with rays, densely racemose on the branches ; involucre-scales narrow- Jin ear, 

 more or less aeute, in 8 — i rows. A very common species in moist fields, dis- 

 tinguished from the last by its much narrower leaves and involucre-scales, and 

 its numerous, densely racemose heads. Very variable. Aug. — Oct. 



11. A. simplex. Willow-leaved Aster* 



Nearly or quite smooth ; stem tall, very branching; leaves lanceolate, acu- 

 minate, lower ones serrate, upper entire ; heads medium size, rather few, ra- 

 cemose on the branches, forming a terminal, leafy panicle; involucre- scales 

 linear, subulate, loosely imbricated. Another very variable species, with pale 

 blue or whitish flowers. In low grounds. Common. Sep. 



12. A. dumosus. Bushy Aster. 



Nearly or quite smooth ; stem branching, paniculate; leaves linear, those of 

 the branches much smaller, oblong, rough on the margin, crowded, entire; 

 lower ones sometimes serrate ; heads medium size, with pale purple, or whitish 

 rays, racemose on the branches, mostly solitary on the branchlets; involucre- 

 scales closely imbricate, broader at summit, obtuse, in 4 — 6 rows. A variable 

 and rather handsome species, common in thickets and fields. Sep. 



13. A. multiflorus. Many-flowered Aster. 



Pubescent and somewhat rough ; stem very branching ; leaves linear, 

 crowded on the stem, entire, sessile, those of the branche-s much smaller; heads 

 small, with white rays, very numerous, densely racemose on the spreading 

 branches; Involucre-scales Unear-spatulate, with spreading, green tips. An 

 ornamental species with very dense panicles of innumerable white flowers. 

 Dry soils. Common. Stem 1—2 ft high, bushy. Sep. 



14. A. longifulius. 



Long-leaved Aster. 



Nearly or quite smooth : stem very branching, corymbosely paniculate 

 above; leaves linear-lanceolate, or linear, lower ones sometimes ovate-Iauceo- 

 late, entire, or remotely serrate in the middle, smooth and shining above ; 

 heads large, numerous, with many light-purple rays, racemose on the branches ; 

 involucre- scales in 8—5 rows, linear, with acute, spreading, or recurved, green 

 tips. A very handsome species, 2 — 5 ft high, in moist grounds ; often with a 

 purple, flexuous stem. Extremely variable In foliage and size. Common. 

 Sep.— Oct 



15. A. flexuosus. Marsh Aster. 



stem slender, branching, flexuous, very smooth ; leaves linear, long and 

 fleshy, acuminate, entire, upper ones subulate ; heads large, with purple rays 

 and yeUow disk, solitary on the leafy branchlets; involucre-scales in many 

 rows, ovate-lanceolate, appressed, acuminate. A common species in salt 

 marshes; about 1 ft. high. Aug.—Oct. 



16. A. Iinif61ius. Sea Aster. 



stem very branching, paniculate, with nearly erect branches; leaves linear- 

 lanceolate, acumiuate, entire, fleshy, those on the branches subulate; heads 

 small, racemose, or p'aniculate on the branches, numerous ; rays short, not pro- 

 jecting beyond tbe disk, purplish, somewhat in 2 rows; involucre cylindric, 

 with subulate scales, in few rows. An annual species, 1—2 ft. high, found in 

 salt marshes. Aug.—Sep. 



7. SERICOClEPTJS, 

 Heads 12 — 16-flowered. Ray-flowers 4 — 6, perfect. Disk- 

 flowers 6-^10. Involucre oblong, with imbricated, appressed, 

 green-tipped scales. Receptacle alveolate. Aclienia obconic, 

 very silky. Pappus simple, ^ith capillary bj-istlcs. Per. 



1. S. conyzoides. White-topped Aster. 



Somewhat pubescent, simple, corymbose above; leaves oblong-lanceolate, 

 lower often spatulato, smooth beneath, veiny, narrowed at base, serrate toward 

 the apex, the upper ones sessile, nearly entire, lower petiolate ; heads small with 

 short, white rays, and pale yellow disk, in loose flat corymbs; involucre-scales 

 appressed, whitish, with recurved tips ; pappus rust color. A common plant, 1 

 —2 ft high, in dry woods and thickets. July.— Aug. 

 8. DIPLOPAPPTJS, 

 Heads many-flowered. Rays 8 — 12, pistillate. Bisk-flowers 

 perfect. Involucre imbricate, with appressed scales, destitute of 

 green tips. Receptacle flat, alveolate. Pappus double, the ex- 

 terior of very short and stiiF bristles ; interior copious, capillary. 

 Per. 



1. D. linariifolius. Bristly Aster. 



Stems long, often decumbent, somewhat rough, leafy, several from the same 

 root; leaves linear, 1-velned, rigid, smooth, shining above, "very rough on the 

 margins, ending in a mucronate point; heads large, with numerous, deep-bluo, 

 showy rays, solitary on the ends of the pubescent branches. A fine plant, 

 about 1 ft high, with very showy flow^ers. Common in dry soila Sep. 



1. D. umbellatus. Umhelled Aster, 



Smooth ; stem tall, leafy ; leaves lanceolate, entire, acuminate, attenuate at 

 base, rough on the margin; heads very numerous, with white rays and yellow 

 disk, in a terminal, fiat corymb ; involucre-scales somewhat closely imbricated 

 and obtuse, oval -lanceolate. A tall, elegant species, 4 — G ft. high, often with a 

 purplish stem, and supporting a large, level corymb of white flowers. Com- 

 mon in low grounds. Aug. — Sep. 



9. EEfGEEON. 

 Heads many-flowered, somewhat hemispherical. Rays nai'- 

 row, very numerous, pistillate. Disk-flowers perfect. Recepta- 

 cle flat, naked. Involucre nearly in 1 row, with narrow, sub- 

 equal scales. Pappus mostly simple. 



1. E. bellidifolium. Bohin^s Plantain. 



Hairy; stem simple, nearly naked above; radical leaves obovate, obtuse, 

 slightly serrate, canline ones distant, oblong-lanceolate, mostly clasping, entire, 

 acute; heads large, with 60 — 70 broadly-linear, bluish-parple rays, in a close, 

 terminal corymb. A common and early species, 1 — 2 ft high, in fields and 

 thickets. May — June. Per. 



2. E. Philadelphicum. Purple Fleahane. 



Hairy; stem slender, leafy; leaves thin, oblong, clasping at base, niostly en- 

 tire ; heads with exceedingly numerous and narrow, reddish -purple, or flesh- 

 colored rays, broadly corymhed at the summit of the stem. A common species 

 in thicketSAud fields, 1 — 3 ft high. June — Aug. Pei\ 



3. E. annuum. Daisy Fleahane. 



stem tall, furrowed, rough, pubescent, branching ; leaves hairy, closely ser- 

 rate, the lowest ovate, tapering into a "winged petiole ; upper ones ovate-lanceo- 

 late, crowded, acute, tapering at base, sessile, the uppermost lanceolate; iioad!, 

 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. Yery common. August. An. and Bien. 



4 E. strig6sum. White-weed. 



stem erect, branching, slender, furrowed, more or less pubescent and 

 rough; leaves mostly entire, tapering at both ends, lowest ones oblong, or 

 spatulate, 3-veined, attenuate to a petiole, upper ones lanceolate ; heads small, 

 with rays twice as long as the involucre, and a yellow disk, in large, loose, ter- 

 minal, paniculate corymbs. A weed in flelds, equally common with the last, 

 about 2 ft high, and a much more slender plant June— Sep. An or Bien. 



5, E. Canadense. Fleahane. 



Hairy ; stem erect, furrowed, with numerous short branches ; leaves linear- 

 lanceolate, or linear, mostly entire, radical ones incised ; heads very numerous, 

 small, with numerous white rays scarcely longer than tbe involucre, racemose 

 on the branches, forming along, terminal panicle. A common W(.'((l in wastf; 

 places, varying greatly in si?e and form, 6'— 6 ft in height July. — Oct. A7t.. 

 cmd Bien. 



10. CALLlSTEPHUS. 



Ray-flowers pistillate, numerous ; disk-flowers perfect. In^ 

 volucre hemispherical. Receptacle somewhat convex. Pappus 



