A3TER. COMPOSITE. 153 



that name has small flowers, and is therefore not so ornamental as Willdenow 

 represents. 



98. A. ronfertus (Nees) : stem robust, smooth, somewhat corymbose-de- 

 compound at the snmmit; the branches corymbose and much crowded; 

 leaves oblong-lanceolate, acuminate, with a cordate-clasping base, appressed- 

 serrate in the middle, the margins scabrous; involucre imbricate. Nees, Ast, 

 p. 126 ; DC. prodr. 5. p. 245 ; not of Desf. 



North America. (Cultivated in the Botanic garden at Bonn.) — The heads 

 are said to be middle-sizeil ; and the rays white, not changing to violet, as in 

 A. A'ersicolor, under which name it is cultivated in some gardens, according 

 to Nees. Achenia glabrous. 



99. A. strictus (Poir.) : stem glabrous, strict, racemose-decompound ; the 

 branches strict, coarctate ; leaves lanceolate, attenuate, partly clasping, 

 somewhat serrate in the middle, scabrous towards the margins; involucre 

 closely imbricated. Nees. — Poir. suppl. 1. p. 498; Nees, Ast. p. 124; DC. 

 prodr. p. 245. (excl. /5.) 



North America. — " Resembles A. praealtus; from which it differs by its 

 shorter branches; the leaves more (appressed-) scabrous towards the mar- 

 gins ; the larger heads ; the closely imbricated involucre, which is scarcely 

 subsquarrose even in the terminal head ; the narrow, elongated and somewhat 

 distant lilac-colored rays, which in that species are paler, a little shorter, and 

 approximate." Nees. This author however does not place it in the section 

 ■which includes A. prasaltus, but with his Concinni, between A. Chilensis and 

 A. mutabilis. We have seen no specimens. The A. strictus /i., Lindl. in 

 Hook. jl. Bor.-Am. appears not sufficiently different from the A. laxifolius 

 of the same work. 



100. A. onustus (Nees) : stem racemose-compound, decurved ; the branches 

 lax, racemose at the summit; leaves tapering to each end, partly clasping, 

 appressed-serrate in the middle, the margins scabrous; heads somewhat 

 secund, on short pedicels; scales of the short involucre imbricated, lanceolate, 

 scarcely equalling the disk. Nees, Ast. p. 122 ; DC. jnodr. 6. p. 245. A. 

 confertus, Desf. cat. hort. Par. ed. 3. p. 401, not of Nees, fide DC. 



/?. squarrosus (Lindl.) : leaves of the branchlets linear, squarrose. (Culti- 

 vated in the English gardens under the name of A. Tradescanti cseruleus.) 

 Lindl. in DC. I. c. 



North America ? but the origin very doubtful. — Nees compares it with his 

 A. amplexicaulis, A. mutabilis, and A. Isevigatus (all of which are probably 

 included under our A. Isevis) ; but states the heads to be more like those of 

 A. luxurians. The stem is said to be 3 or 4 feet high, the summit decurved 

 by the weight of the flowers, glabrous, or with a few scattered small bristles, 

 or slightly hirsute in lines at the summh ; the leaves smooth and lucid. 

 Heads crowded, nodding, with copious pale blue rays ; the scales of the 

 turbinate involucre not densely imbricated, lanceolate, with a membranaceous 

 margin, ciliate. Achenia glabrous. Nees. 



101. A. purpuratus (Nees) : stem somewhat simply racemose-virgate ; 

 the branches elongated and bearing single heads ; leaves narrowly lanceo- 

 late, clasping, with scabrous margins, sharply serrate in the middle ; the 

 uppermost ovate-lanceolate ; those of the branches numerous, lanceolate, 

 spreading, entire, equal and equally distant; scales of the turbinate involucre 

 imbricated, lanceolate, with colored tips. Nees, Ast. j). 118; DC. prodr. 5. 

 2). 244. A. miser. Lam. did. 1. p. 308 (excl. syn.), fide DC. 



North America ? Cultivated for many years at the Garden of Plants, 

 Paris, under the name of A. miser. — Scales of the involucre imbricated in 

 several series, not rigid, lanceolate-triangular, whitish at the base, with pur- 

 plish tips, all similar ; the inner nearly the length of the disk ; the outer- 

 VOL. 1I.-20 



