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Allium
Ornamental Onion
ALLIACEAE / LILACEAE
Herbaceous
Perennial

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Allium. cristophii |
Allium. cernuum |

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Alliums are distinctive
bulbous perennials that produce round or pendant clusters of bell shaped
flowers in spring or summer, some up to 12in (30cm) across.
Alliums range in size
from small plants suitable for the rock garden, through to giants of
some 6ft (2m) tall.
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| Varieties: -
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| Allium.
acuminatum
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syn A.
murrayanum
Form: Bulb
Height: 4-12in (10-30cm)
Spread: 2-3in (5-8cm)
Foliage: Having 2 - 4 long, narrow, semi-erect, basal leaves.
Flowers: During spring the stem bears an umbel 2in (5cm) across of up to 30
small, purplish pink flowers.
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Allium.
aflatunense of gardens
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See:
Allium.
hollandicum
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Allium. akaka
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Form: Bulb
Height: 6-8in (15-20cm)
Spread: 5-6in (12-15cm)
Foliage: Producing 1-3 broad, prostrate, basal, grey green leaves.
Flowers: In spring producing an almost stemless, spherical umbel 2-3in (5-7cm)
across with 30-40 star-shaped, white to pinkish-white flowers with red
centres.
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Allium. albopilosum
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See:
Allium.
cristophii
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Allium. azureum
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See:
Allium.
caeruleum
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Allium. beesianum
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Form: A clump forming
bulb
Fully Hardy:
Height: 8-12in (20-30cm)
Spread: 2-4in (5-10cm)
Foliage: Producing linear, grey-green leaves.
Flowers: In late summer it bears pendant heads of bell shaped blue flowers
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Allium. caeruleum
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Syn: Allium.
azureum
Form: A clump forming bulb
Height: 8-32in (20-80cm)
Spread: 4-6in (10-15cm)
Foliage: Narrow, erect leaves are held on the lower third of the slender flower
stems
Flowers: The blue, 30-50 star-shaped, flowers are produced in dense, spherical,
umbels of 1.25-1.75in (3-4cm) across during summer.
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Allium. campanulatum
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Form: A clump forming
bulb
Frost Hardy
Height: 4-12in (10-30cm)
Spread: 2-4in (5-10cm)
Foliage: Linear, semi-erect, basal leaves die away before flowering.
Flowers: Produces a domed umbel of 1-3in (2.5-7cm) across, carrying up to 30
small, star-shaped, pale pink, or white flowers.
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Allium. carinatum
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sub-species
pulchellum
Syn: Allium. pulchellum
Form: A clump forming bulb
Fully Hardy
Height: 12-24in (30-60cm)
Spread: 3-4in (8-10cm)
Foliage: Linear semi-erect leaves sheath the lower two thirds of the stem.
Flowers: During the summer producing an umbel of pendant cup-shaped, purple
flowers.
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Allium. cernuum
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Form: A clump forming
bulb
Height: 12-28in (30-70cm)
Spread: 3-5in (8-12cm)
Foliage: Narrow, semi-erect, basal, leaves.
Flowers: In summer each stem produces up to 30 cup-shaped, pink or white, flowers
in a loose, nodding umbel of .75-1.5in (2-4cm) across.
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Allium. christophii |
See: Allium. cristophii
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Allium. cowanii |
See:
Allium.
neapolitanum
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Allium. cristophii |
Syn: Allium.
albopilosum, Allium. christophii
Form: A bulb
Height: 6-16in (15-40cm)
Spread: 6-8in (15-20cm)
Foliage: Semi-erect, hairy, grey, leaves, which droop at the tips.
Flowers: In summer producing a large, spherical, umbel of 50 or more star-shaped,
purplish-violet, flowers
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Allium. cyaneum |
Form: Tuft forming
bulb
Fully Hardy
Height: 4-12in (10-30cm)
Spread: 2-3in (5-8cm)
Foliage: Leaves are thread-like and erect
Flowers: In summer each stem produces a small, dense, umbel of five or more
pendant, cup-shaped, blue or violet-blue flowers 0.25in (0.5cm)
long.
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Allium. cyathophorum
var farreri |
Form: A clump forming
bulb
Height: 6-12in (15-30cm)
Spread: 4-6in (10-15cm)
Foliage: Having tufts of narrow, erect, basal, leaves.
Flowers: In summer each stem produces a small, loose umbel 0.5-1.5in (1.5-4cm)
wide, of up to 30 bell shaped, dark reddish-purple flowers, later
turning to sharply pointed seeds.
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Allium. flavum |
Form: A clump forming
bulb
Height: 4-14in (10-35cm)
Spread: 2-3in (5-8cm)
Foliage: Linear semi-erect leaves are produced on the lower half of the slender
flower stem.
Flowers: In summer, loose umbels of up to 60 small, bell-shaped, yellow flowers
are carried on thin arching stems
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Allium. giganteum |
Form: Bulb
Height: up to 6ft (2m)
Spread: 12-14in (30-35cm)
Foliage: Long, wide, semi-erect, basal leaves.
Flowers: In summer a stout stem carries a dense spherical umbel 5in (12cm)
across, of 50 or more star-shaped, purple, flowers.
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Allium. x hollandicum |
Syn: Allium.
aflatunense of gardens
Form: Bulb
Height: 3ft (1m)
Spread: 4in (10cm)
Foliage: Mid-green, basal, leaves, die away by flowering time.
Flowers: In summer producing numerous star-shaped, purplish-pink, flowers in
dense, spherical umbels 4in (10cm) across.
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Allium. kansuense |
See:
Allium.
sikkimense
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Allium. karataviense |
Form: A bulb
Height: 8in (20cm)
Spread: 10-12in (25-30cm)
Foliage: Having narrow to elliptic, prostrate, basal, greyish-purple leaves.
Flowers: During late spring producing stems with a spherical umbel of 6in (15cm)
or more across, carrying 50 or more star-shaped, pale purplish-pink
flowers.
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Allium. macranthum |
Form: Tuft forming
bulb
Height: 8-12in (20-30cm)
Spread: 4-5in (10-12cm)
Foliage: Linear leaves on the lower part of the flower stems.
Flowers: In summer each slender flower-stem produces a loose umbel of up to 20
bell-shaped, deep-purple flowers, each 0.5in (1cm) long.
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Allium. mairei |
Form: A clump forming
bulb
Fully Hardy
Height: 4-8in (10-20cm)
Spread: 4-5in (10-12cm)
Foliage: Erect, thread-like, basal, leaves
Flowers: Wiry stems, carrying a small, shuttlecock-shaped umbel of up to 20
upright, bell-shaped, pink, flowers, each 0.5in (1cm) long, during late
summer or early autumn.
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Allium. moly |
Form: A clump forming
bulb
Height: 4-14in (10-35cm)
Spread: 4-5in (10-12cm)
Foliage: 1-3 broad, semi-erect, basal, grey-green leaves.
Flowers: In summer, each stem, bears fairly dense umbels 1.5-3in (4-8cm) of up to
40 star-shaped yellow flowers
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Allium. murrayanum |
See:
Allium.
acuminatum
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Allium. narcissiflorum |
Syn: Allium.
pedemontanum of gardens
Form: A clump forming bulb
Height: 6-12in (15-30cm)
Spread: 3-4in (8-10cm)
Foliage: The flower stems carry very narrow, erect, grey-green leaves on the
lower part of the flower stems.
Flowers: In summer producing an umbel of up to 15 bell-shaped, pinkish-purple
flowers
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Allium. neapolitanum |
Syn: Allium.
cowanii
Form: Bulb
Height: 8-20in (20-50cm)
Spread: 4-5in (10-12cm)
Foliage: Narrow, semi-erect leaves on the lower quarter of flower stems.
Flowers: In spring each stem produces an umbel, 2-4in (5-10cm) across, of up to
40 white flowers.
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Allium. oreophilum |
Syn: Allium.
ostrowskianum
Form: A dwarf bulb
Height: 2-4in (5-10cm)
Spread: 3-4in (8-10cm)
Foliage: Bulb with 2 narrow, semi-erect, basal leaves.
Flowers: This spring and early flowering bulb produces loose domed umbels of up
to 10 widely bell shaped, deep rose-pink flowers
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Allium. ostrowskianum |
See:
Allium.
oreophilum
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Allium. pedemontanum of
gardens |
See:
Allium.
narcissiflorum
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Allium. pulchellum |
See:
Allium.
carinatum, subsp pulchellum
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Allium. schoenoprasum
Chives |
Form: A clump forming
bulb
Height: 5-10in (12-25cm)
Spread: 2-4in (5-10cm)
Foliage: Dark-green, hollow, narrow, erect, leaves growing from the base.
Flowers: In summer stems carry up to 20 tiny pale-purple or pink flowers in a
dense umbels up to 2in (5cm) across
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Allium. schubertii |
Form: A bulb
Height: 12-24in (30-60cm)
Spread: 6-8in (15-20cm)
Foliage: Widely strap-shaped, semi-erect, basal, leaves.
Flowers: In early summer producing large umbels of 40 or more star-shaped, pink
to purple, flowers on unequal stems, followed by brown seed capsules.
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Allium. senescens |
Subspecies: Allium. senescens. montanum
Form: A vigorous clump forming bulb
Height: 18in (45cm)
Spread: 24in (60cm)
Foliage: Producing strap-shaped, often twisted, grey-green leaves.
Flowers: In summer carries dense umbels .75in (2cm) across, with up to 30
long-lasting, cup shaped, pink flowers.
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Allium. sikkimense |
Syn: Allium.
kansuense
Form: A tuft forming bulb
Fully Hardy
Height: 4-10in (10-25cm)
Spread: 2-4in (5-10cm)
Foliage: Leaves are linear, erect, and basal.
Flowers: In summer, up to 15 bell-shaped, blue flowers 0.25-0.5in (1-2cm) long
are borne in a small pendant umbel.
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Allium. sphaerocephalon |
Form: Clump forming
bulb.
Fully Hardy
Height: 24 in (60cm)
Spread: 3-4in (8-10cm)
Foliage: Linear, semi-erect leaves on the bottom third of thin wiry stems
Flowers: In summer producing a very dense umbel 0.75-1.5in (2-4cm) across, with
up to 40 small, bell-shaped, pinkish-purple flowers.
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Allium. stipitatum |
Form: A bulb
Height: 3-4ft (1-1.5m)
Spread: 6-8in (15-20cm)
Foliage: Strap-like, semi-erect, basal leaves.
Flowers: In summer producing 50 or more star-shaped, pinkish-purple flowers, in a
spherical umbel 3-5in (8-12cm) in diameter
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Allium. unifolium |
Form: A bulb
Height: 12in (30cm)
Spread: 3-4in (8-10cm)
Foliage: A single, semi-erect, basal, grey-green leaf.
Flowers: In late spring producing up to 30 purplish-pink flowers in a domed umbel
2in (5cm) across.
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Cultivation: -
Some need fertile soil in
semi-shade, and others a well drained fully sunny aspect
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Propagation: -
By seed in in late summer, early
autumn when fresh: or
By division after flowering
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Fully Hardy
Pests & Diseases: -
Onion Fly
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This page was last updated on 05/02/2004
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