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Photo is of parent taxon

panicle onion

Bulbs

1–8, not clustered on stout primary rhizome, increase bulbs absent or ± equaling parent bulbs, never appearing as basal cluster, rhizomes lacking, ovoid, 1–1.5 × 1–1.5 cm;

outer coats enclosing renewal bulbs, dark brown, membranous, very obscurely reticulate, cells rectangular, vertically elongate, without fibers, meshes delicate;

inner coats white to light brown, cells rectangular, vertically elongate.

Leaves

persistent, withering from tip at anthesis, 3–5, sheathing proximal 1/3–1/2 scape;

blade solid, terete to semiterete, channeled, 5–35 cm × 1–5 mm, margins entire.

Scape

persistent, solitary, erect, solid, terete, 30–70 cm × 1–3(–4) mm.

Umbel

persistent, erect, loose, 25–100-flowered, globose to ovate, bulbils unknown;

spathe bracts persistent, 2, 4–9-veined or veins not visible, ovate to narrowly lanceolate, unequal, longer bract 5–14 cm, greatly exceeding pedicels, apex contracted into appendage, appendage terete, 5–14 cm.

Flowers

campanulate, 5–7 mm;

tepals erect, white to lilac pink, ovate, ± equal, becoming papery and withering in fruit, margins entire, apex obtuse;

stamens included to slightly exserted;

anthers yellow;

pollen yellow;

ovary crestless;

style exserted, linear;

stigma capitate, scarcely thickened;

pedicel unequal, 10–45 mm.

Seed

coat not known.

Allium paniculatum var. paniculatum

Phenology Flowering Jun–Jul.
Habitat Disturbed areas
Elevation 0–50 m (0–200 ft)
Distribution
from FNA
CA; Europe [Introduced in North America]
Discussion

Allium paniculatum var. paniculatum is naturalized around San Francisco Bay and elsewhere in northern California. It is native to Europe and is potentially a noxious weed.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 26, p. 244.
Parent taxa Liliaceae > Allium > Allium paniculatum
Name authority unknown
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