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August (L lanceolate narrowed at base)

l. lanceolate, narrowed at base, acuminated, scabrous at edge. Stem simple, corymbose at end. h. 2ft. North America, 1759. A. argenteus (silvery).* fl.-heads purple. August. l. oblong-lanceolate, silky, sessile. Stem slender, decumbent, loosely branched; branches and branchlets one-headed. h. 1ft. North America, 1801.

A. bellidiflorus (Daisy-flowered). fl.-heads pale red; involucre with spreading scales. September. l. amplexicaul, narrow-lanceolate, scabrous above, lower sub-serrated. Stem much branched. h. 3ft. North America. A. Bigelovii (Bigelow's).* fl.-heads corymbose, 2 1/2in. diameter, ray-florets lilac, disk yellow. Summer. l. scabrous pubescent, oblong-spathulate; cauline ones amplexicaul, ovate-oblong, crenate, obscurely-toothed h. 2 1/2ft. Colorado, 1878. A very handsome biennial species. SYN. A. Townshendi. A. blandus (charming). fl.-heads pale purple; racemes scarcely longer than the leaves. October. l. sub-amplexicaul, oblong-lanceolate, acuminate, sessile, smooth. Stem pyramidal. h. 2ft. North America, 1800. A. canescens (hoary). fl.-heads pale purple; involucre imbricated, very acute, longer than disk. September. l. linear. Panicle corymbose, much branched, leafy. h. 2ft. North America, 1812. Biennial or perennial. A. cassiarabicus (Arabian Cassia). fl.-heads pink; panicles corymbose. September. l. ovate, acute, serrated, tapering at the petioles. Plant erect, pilose. h. 2ft. Russia, 1834.

A. caucasicus (Caucasian).* fl.-heads purple, solitary; scales of involucre nearly equal, linear. July. l. ovate, sessile, scabrous. h. 1ft. Caucasus, 1804.

A. ciliatus (ciliated). fl.-heads white. September. l. ciliated; cauline ones linear-lanceolate, nerved; those of the branches very short lanceolate, three-nerved. Stem branched, downy; branches downy. h. 3ft. North America. A. concinnus (neat).* fl.-heads purple; involucre closely imbricated. October. l. sub-amplexicaul, lanceolate; lower ones subserrate, smooth. Stem simple, panicled at end. h. 2ft. North America, 1800.

A. concolor (one-coloured). fl.-heads purple; raceme terminal. October. l. oblong-lanceolate, hoary on each side. Stem simple, erect, downy. h. 1ft. North America, 1759.

A. conyzioides (Conyza-like). Synonymous with Sericocarpus conyzioides. A. cordifolius (heart-leaved). fl.-heads blue, small, disposed in crowded racemes, which are slightly drooping. July. l. cordate, pilose beneath, finely serrated, stalked. Stem smoothish, panicled; panicle spreading. h. 2ft. North America, 1759.

A. coridifolius (Coris-leaved). fl.-heads pale blue. October. l. very numerous, linear, blunt, reflexed, hispid at edge. Stem branched, diffuse, smooth; branches one-headed. h. 1ft. North America.

A. corymbosus (corymbose). fl.-heads corymbose, about 1in. in diameter; ray-florets few, narrow, white; disk-florets pale yellow. Autumn. l. 3in. long, cordate acute, lobed at the base, coarsely toothed. Stems brittle, blackish purple. h. 2ft. to 3ft. SYN. Biotia corymbosa. A. diffusus (diffuse). fl.-heads white; involucres imbricated. October. l. elliptic-lanceolate, equal, serrated, smooth. Branches spreading. Stem pubescent. h. 2ft. North America, 1777.

A. Douglasii (Douglas's).* fl.-heads purple; involucral scales linear or spathulate-linear, loosely imbricated. August. l. lanceolate, acute, entire, or rarely serrate, mostly tapering at the base. Stem smooth, slender, paniculately branched, leafy. h. 3ft. to 4ft. California, &c. A. dracunculoides (Tarragon-like).* fl.-heads white, about 1in. across, disposed in dense cymose clusters; involucre imbricated. September, October. l. linear, acuminated, entire; lower ones linear-lanceolate, sub-serrate. Branches corymbose. h. 3ft. North America, 1811. A very handsome species. A. dumosus (bushy).* fl.-heads white, about 1/2in. across, disposed in broad clusters; involucre cylindrical, closely imbricated. October. l. linear, glabrous; those of the branches very short. Branches panicled. h. 2ft. North America, 1734.

A. d. albus (white).* fl.-heads quite white, and rather smaller than those of the species. North America.

A. d. violaceus (violet). fl.-heads violet-purple. North America. A. elegans (elegant). fl.-heads blue, small; corymb contracted, drooping; scales of involucre oblong-cuneate, blunt, squarrose. September. l. scabrous; cauline ones oblong-lanceolate, acute; radical ones oblong, stalked. h. 2ft. North America, 1790. A very elegant species, having a graceful habit. A. eminens (eminent). fl.-heads light blue. October. l. linear-lanceolate, acuminate, scabrous at edge; lower ones sub-serrated. Stem panicled; branches one-headed. h. 2ft. North America.

A. ericoidos (Heath-like).* fl.-heads white; involucre squarrose, leaflets acute. September. l. linear, glabrous; those of the branches subulate, close together; and those of the stem long. h. 3ft. North America, 1758. A very pretty species.

A. floribundus (many-flowered).* fl.-heads light purple September. l. sub-amplexicaul, lanceolate; lower ones serrated. Stem smooth; branches corymbose. h. 4ft. North America.

A. foliosus (leafy). fl.-heads pale blue; involucre imbricate. September. l. linear-lanceolate, acuminate, narrowed at each end. Stem downy, panicled, erect; branches few-headed. h. 3ft. North America, 1732. A. fragilis (fragile). fl.-heads flesh-coloured, small; involucre imbricated. September. l. linear, acuminate, entire; radical ones oblong, serrate. Branches in corymbose panicles. h. 2ft. North America, 1800. A. grandiflorus (large-flowered).* fl.-heads purple, large, terminal; scales of involucre squarrose. November. l. linear, rigid, acute, sub-amplexicaul; those of the branches reflexed, hispid at edge. h. 2ft. North America, 1720. A. hyssopifolius (Hyssop-leaved).* fl.-heads white, or purple shaded; scales of the involucre about half as long as the disk. August to October. l. linear-lanceolate, acute, with the margins scabrous. Branches fastigiate and corymbose, smooth. h. 1 1/2ft. to 2ft. North America. A. laevigatus (smooth-stemmed). fl.-heads flesh-coloured, about 1in. across, disposed in large panicles. September. l. subamplexicaul, broad-lanceolate, sub-serrate, smooth. Stem glabrous. Branches many-headed. h. 3ft. North America, 1794.

A. laevis (smooth).* fl.-heads blue; involucre imbricated with cuneiform leaflets. September. l. sub-amplexicaul, remotely oblong, entire, lucid; radical ones sub-serrated. h. 2ft. North America, 1758. One of the best border species.

A. laxus (loose-flowered). fl.-heads white, about 1in. across; clusters loose. October. l. linear-lanceolate, scabrous at edge; lower ones sub-serrated; stem ones reflexed. Stem loosely panicled. h. 2ft. North America. A. linarifolius (Toad-flax-leaved). fl.-heads pale blue. September. l. numerous, linear, mucronated, nerveless, not dotted, keeled, scabrous, rigid. Branches fastigiate, one-headed. h. 1ft. North America, 1699. A. linifolius (Flax-leaved). fl.-heads white; involucre imbricated, short. July. l. linear, nerveless, dotted, scabrous, reflexed, spreading. Branches corymbose, fastigiate, leafy. h. 2ft. North America, 1739. A. longifolius (long-leaved).* fl.-heads white, 1in. across, in dense corymbose panicles; involucre squarrose. October. l. linear-lanceolate, rarely toothed, very long, smooth. h. 3ft. North America, 1798. There are several varieties of this handsome species.

A. l. formosus (charming).* fl.-heads pink, produced in dense corymbs. h. 1 1/2ft. to 2ft.

A. macrophyllus (large-leaved). fl.-heads white. August. l. large, ovate, stalked, serrated, scabrous; upper ones cordate, sessile. Stem branched, diffuse. h. 2ft. North America, 1739.

A. multiflorus (many-flowered).* fl.-heads white, small; corymb large, elongated; involucre imbricated; scales oblong, squarrose, acute. September. l. linear, glabrous. Stem much branched, diffuse, downy; branchlets one-sided. h. 3ft. North America, 1732.

A. myrtifolius (Myrtle-leaved). fl.-heads white; involucre imbricated; scales length of disk. August. l., stem ones, amplexicaul, scabrous; those of the branches small. h. 2ft. 1812.

A. novae-angliae (New England).* fl.-heads purple, in terminal clusters. September. l. linear-lanceolate, pilose, amplexicaul, auricled at base. Stem simple, pilose, straight. h. 6ft. North America, 1710. One of the best; having a tall and robust habit.

A. n.-a. rubra (red).* fl.-heads deep red pink, in other respects like the type. North America, 1812.

A. novae-belgii (New York).* fl.-heads pale blue. September. l. sub-amplexicaul, lanceolate, glabrous, scabrous at edge; lower ones sub-serrated. Branches divided. h. 4ft. North America, 1710. There is a variety known in gardens which belongs to this species, under the name of amethystinus, the flowers of which are much larger and very showy. A. obliquus (oblique). fl.-heads numerous; ray white; disk purplish. Autumn. l. alternate; lower ones linear-lanceolate, oblique; upper stem ones smaller. h. 5ft. North America. A very fine species, forming large tufts. A. paniculatus (panicled).* fl.-heads light blue; involucre loose. September. l. ovate-lanceolate, sub-serrated, stalked, smooth; petioles naked. Stem much branched, smooth. h. 4ft. North America, 1640.

A. pannonicus (Pannonian). fl.-heads violet; scales of involucre lanceolate, blunt, equal. July. l. linear-lanceolate, hispid at edge. Stem simple, corymbose. h. 2ft. Hungary, 1815.

A. patens (spreading). fl.-heads light purple, about 1in. across. October. l. oblong-lanceolate, ciliate, cordate, amplexicaul, scabrous on each side, hairy. Stem branched, hairy. h. 2ft. North America, 1773. A. pendulus (drooping).* fl.-heads pure white at first, ultimately rosy pink, small. September. l. elliptic-lanceolate, serrate, smooth, those of the branches distant. Branches much spreading, pendulous. h. 2ft. North America, 1758. A very pretty species.

A. peregrinus (foreign).* fl.-heads bluish purple, 2in. across; July, August. l. lanceolate, sub-acute, entire, smooth, those of the stem rather narrower than the radical ones. Stem smooth, or nearly so, two or three-flowered. h. 1ft. North America. A very pretty little species for the rockery or border. A. pilosus (pilose). fl.-heads pale blue; involucre oblong, loose, imbricated. September. l. linear-lanceolate, hoary. Stem branched, villous; branchlets somewhat one-sided, one-headed. h. 2ft. North America, 1812. A. praecox (early). fl.-heads violet; involucre imbricated; scales nearly equal; outer scales somewhat spreading. July. l. oblong-lanceolate, narrowed at the base. Stem hairy. h. 2ft. North America, 1800. A. pulchellus (beautiful).* fl.-heads purple, solitary; scales of involucre nearly equal, linear, acuminate. June. l., radical ones spathulate; cauline ones linear-lanceolate. h. 1ft. Armenia.

A. puniceus (red-stalked). fl.-heads blue, about 1in. across; panicle large, pyramidal; involucre loose, longer than the disk. September. l. amplexicaul, lanceolate, serrate, roughish. Branches panicled. h. 6ft. North America, 1710. A. pyrenaeus (Pyrenean).* fl.-heads lilac-blue (disk yellow), large, three to five in a short corymb. July. l. scabrous on both sides; cauline ones oblong-lanceolate, acute, sessile, sharply serrated on the upper part. h. 1ft. to 1 1/2ft. Pyrenees.

A. Reevesi (Reeves's). fl.-heads white, with yellow centre, small; panicle dense, pyramidal. Autumn. l. linear, acute. Branches slender. h. 9in. to 12in. North America. A very desirable species, suitable for rockwork. A. reticulatus (netted). fl.-heads white. July. l. lanceolate-oblong, acute at each end, sessile, revolute at end, netted, and three-nerved beneath. Plant hoary all over. h. 3ft. North America, 1812.

A. rubricaule (red-stemmed). Synonymous with A. spurius. A. salicifolius (Willow-leaved). fl.-heads flesh-coloured; involucre lanceolate, imbricate; scales acute, spreading at end. September. l. linear-lanceolate, nearly entire, smooth. Stem smooth, panicled at end. h. 6ft. North America, 1760.

A. salsuginosus (salt-plains).* fl.-heads violet-purple; involucral scales linear, loose, glandular. July. l. entire, the lower spathulate, obovate, tapering into a margined petiole; the upper ones lanceolate, acute, with broad base, usually sub-amplexicaul. Stem minutely pubescent, leafy nearly to the top, few-flowered. h. 9in. to 18in. North America, 1827. A very handsome species.

A. s. elatior (tallest). This variety grows 2ft. or more high, and has rather larger flowers than the type. North America.

A. sericeus (silky). fl.-heads deep blue; terminal, about 1 1/2in. across. Summer and autumn. l. oblong-lanceolate, sessile, entire, three-nerved, silky with down. h. 3ft. Missouri, 1802. This is a half-hardy evergreen shrub, and requires a warm, well-drained soil.

A. serotinus (late-flowering). fl.-heads blue. September. l. oblong-lanceolate, acuminate, sessile, smooth, scabrous at edge; lower ones serrated; branches corymbose, smooth. h. 3ft. North America. A. Shortii (Short's). fl.-heads purplish blue, about 1in. across; panicles long, racemose, Autumn. l. lanceolate, elongated, acuminated, cordate at the base. h. 2ft. to 4ft. Stem slender, spreading. North America. A. sibiricus (Siberian). fl.-heads blue; involucre loose; leaflets lanceolate, acuminate, hispid. August. l. lanceolate, sub-amplexicaul, serrate, pilose, scabrous. h. 2ft. Siberia, 1768.

A. sikkimensis (Sikkimese).* fl.-heads purple; leaflets of involucre linear, acuminate, sub-squarrose. October. l. lanceolate, acuminate, spinosely denticulate; radical ones on longer petioles; cauline ones sessile; corymbs large, of many heads, leafy, erect, glabrous, branched. h. 3ft. Sikkim, 1850. A. spectabilis (showy).* fl.-heads blue; scales of involucre loose, leafy.