162 COMPOSITtE. Astf.r. 



Sept.-Oct. — Stem erect or ascending, 6-20 inches high ; the whole plant 

 very smooth, with a somewhat glaucous hue. Leaves succulent, 3-G inches 

 long; those of the branches reduced to ovate-subulate acuminate bracts, 

 passing into the chartaceous regularly imbricated scales of the involucre. 

 Heads few, about half an inch in diameter. Rays about 20, pale purple, 

 oblong-linear, moderately exserted. Achenia oblong-linear. 



* • Scales of the involucre in 2-3 scries : rays mare or less disUncthj in a double series, 

 very short ; the ligides scarcely exceeding the papp^is, or sometimes icanting : annual. 

 (Conyzopsis.) 



121. A. angustus : stem strict; the branches erect, racemose; leaves 

 linear, acute, ciliate-serrulate ; scales of the hemispherical involucre linear, 

 acute, in about 2 series, somewhat equal ; ligiiles extremely short, or want- 

 ing ; achenia densely and minutely hirsute-pubescent. — Tripolium angus- 

 tum, Lindl.! in Hook.fl. Bor.-Am. 2. p. 15, <)• in DC. prodr. 5. p. 254. 



Saskatchawan, and towards the Eocky Mountains, Drummond ! Slave 

 Lake, Richardson! — Plant a foot or more in height, with numerous strict 

 branches, glabrous or nearly so, except the serrulate-ciliate or ciliate-scabrous 

 margins of the slender leaves. Heads as large as in the following, racemose 

 (either few or numerous) on the branches. Exterior scales of the involucre 

 nearly or entirely destitute of membranaceous margins. Ray-flowers in two 

 series; the corolla shorter than the capillary pappus, with an extremely short 

 ligule (shorter than the style), or frequently reduced to a slender truncate tube 

 (as in Conyza, &c.), which is often much shorter than the style. Corolla of 

 the disk also slender. 



122. A. linifolius {hmn.): very smooth and glabrous; stem erect, race- 

 mosely branched or compound ; the branches erect-spreading, bearing nume- 

 rous racemose or paniculate heads ; leaves linear or narrowly lanceolate, at- 

 tenuate-acute or acuminate, entire ; the lowermost lapering into a petiole ; 

 those of the branches subulate ; scales of the cylindraceons involucre linear- 

 subulate, unequal, in about 3 series; ray-flowers somewhat in two series; the 

 ligules scarcely exceeding the pappus ; achenia narrow, minutely pubescent. 

 — Linn. ! hort. Cliff, p. 408, c^- spec. 2. p). 874 (excl. syn. Gronov.) ; not of 

 Ait., Willd., (.yc. A. subulatus, -M;c//.T. .' fl. 2. p. Ill (partly); Nutt. ! gen. 

 2. p. 154 ; Ell. ! sTc. 2. p. 345 ; Bigel. ! fl.. Bost. ed. 2. p. 3(^9. A. longifolius, 

 Desf. cat.? Poir. suppl. 1. _p. 480 / Tripolium subulatum, Nees, Ast. p. 

 156 (in part); DC. jjrodr. b. p. 254, partly. 



Salt marshes, Massachusetts ! to South Carolina ! Sept.-Oct. — Stem 1-3 

 feet high, stout, erect, usually much branched, with numerous paniculate 

 or corymbose-paniculate heads, which are 4 to 5 lines in length. Leaves 

 rather fleshy ; the lower 4 to 6 inches long, 3 to 4 lines broad, narrowed be- 

 low, partly clasping, obscurely veined. Scales of the involucre very acute, 

 the inner fully as long as the disk. Ray-flowers about 30, with very short 

 purplish-white ligules, often shorter than the capillary pappus ; the disk- 

 flowers fewer. Pappus in a single series. Receptacle almost naked. In- 

 volucre reflexed after the fruit is mature. — The A. subulatus of Michaux, 

 as well as the Tripolium subulatum of subsequent authors, doubtless includes 

 both this and the following species ; but Michaux's character is at least partly 

 derived from the present species, which moreover is alone found so far north 

 as Pennsylvania. But if we may rely upon our memoranda respecting the 

 specimens in the herbarium of the Hortus Clifli)rtianus, asd upon their au- 

 thenticity, the plant here described is the original A. linifolius (the A. foliis 

 linearibus acuiis, caule corymbose ramosissimo, Linn. hort. Cliff', p. 408) ; 

 a name to which we may revert without increasing the confusion, since the 

 A. linifolius of subsequent authors is a Galatella, and probably only a variety 



