ORNAMENTAL PLANTS OF HORTICULTURE VALUE
Selection of perennials
Artemisia, sagebrush, mugwort, wormwood
About 360-400 species of annual or perennial herbs or small shrubs,
mainly in the Northern Temperate Zone in Eurasia and North America of
which about 200 in the FSU. Only a few are decorative. A. arbotanum
L., old man, is an old medicinal and spice plant long in cultivation,
A. dracunculus L. is a well-known spice plant and A.
stelleriana Besser has ornamental application. Other species can
be used, especially in extreme conditions because most species of the
genus come from dry regions, with hot climates.
A. balchanorum Krasch.
Central Asia (Turkmenia, mountain regions). On clay soil on slopes
and on limy, gravelly soil.
Taproot thick and woody. Perennial or sub-shrub 40-50 (80) cm.
Stems clustered, much branched towards the top. Basal leaves petiolate,
2 or 3 times pinnately dissected, upper leaves linear. Flower heads
sessile, erect, oblong, 3-4 mm long, in groups of 2 or 3 in a dense
panicle. Flowers 4 to 5 per head, yellow. V - early spring to late
autumn (in nature March to November). Fl - July-August. Fr - September.
P - by seed and cuttings. Does well in a very dry and hot climate,
staying green the entire season without watering. Requires a sunny
position. Good for group planting. Z 6 (5). New.
A. gmelinii Web. ex Stechm.
Siberia (southern regions), Central Asia (northeastern region), Far
East (southern continental regions and Sakhalin Island), North China
and Mongolia. In open forests and in meadows and clearings.
Taproot thick up to 3-5 cm diam. Perennial or sub-shrub 50-100 cm,
richly branched. Leaves petiolate, elliptic, bipinnately dissected,
densely white or grey pubescent beneath, loosely pubescent above.
Flower heads globose, nodding, in a short panicle. V - early spring
to late autumn (in nature March to November). Fl - August. Fr -
September - October. P - by seed or cuttings. Does well in the dry
climate. Requires a sunny position. Good for group planting. Z 5 (4).
A. schmidtiana Maxim., silvermound mugwort.
Far East (Amgunskiy region, Sakhalin, southern Kuril Islands) and
Japan. On sandy sites near the sea shore, along streams, on cliffs
and rocky slopes.
Perennial or subshrub 15-30 (60) cm. Stems unbranched and bare at
the base, much-branched towards the top. Leaves petiolate, 4-5 cm long,
bipalmately compound. Upper leaves linear, 1.5 cm long. All leaves
densely silver-silky tomentose. Flower heads stalked, semiglobose, in
clusters. Flowers white. V - early spring till the first frost.
Young branches overwinter with green leaves. Fl - August. Fr - October.
P - by seed or cuttings. Self-sowing plant. Requires a sunny position,
and well-drained soil. Z 5 (4).
A. stelleriana Besser, dusty miller, old woman, beach
Far East (Amgunskiy and Ussuriyskiy regions, Kamchatka, Sakhalin,
southern Kuril Islands), Scandinavia, Japan and North America (Alaska).
Along streams, near the sea shore on gravelly soil, on slopes.
Creeping perennial. Sterile stems numerous, 20-30 cm. Flowering
shoots solitary, rarely 2 or 3, thickened, up to 50 cm. Leaves petiolate,
spathulate or ovate, deeply toothed. Entire plant silver-white tomentose.
Flower heads stalked, cup-shaped, 5-8 mm long in spike-like inflorescence.
V - early spring to late autumn. Fl - August. Fr - October (not every
year). P - by seed or cuttings and also by division. Does well in sunny
position and on well-drained soil. Z 5 (4).
Also of ornamental value:
A. aurata Kom. Annual from the Far East (Ussuriyskiy
Region), Japan, northern China and Korea. The numerous golden flowers
make the plant very attractive. New.