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Nevius' onion

nodding onion

Bulbs

1–5+; ovoid;

outer coats enclosing 1 or more bulbs, membranous; more or less reticulate;

cells quadrate to polygonal, vertically oblong; without fibers.

2–5+, clustered, often short-rhizomatous at base, oblong, elongate;

outer coats enclosing 1 or more bulbs, membranous, minutely striate, cellular-reticulate;

cells in regular vertical rows, narrowly elongate; fibers persistent; parallel; few.

Leaves

usually persistent, withering from tip at anthesis, 2;

blades solid; flat or more or less channeled, falcate, 12–25 cm × 2–3 mm.

persistent, green at anthesis, 3–5;

blades solid; flat, channeled to broadly V-shaped in cross section, 10–25 cm × 1–6 mm.

Scapes

persistent, 1–3; erect; solid; terete or somewhat flattened, 2-edged, not expanded proximal to inflorescence, 15–30 cm × 1–3 mm.

persistent, sometimes 2 or more produced successively from single bulb, usually clustered, nodding; solid; terete or ridged, particularly distally, sometimes flattened and narrowly winged, abruptly recurved near apex, 10–50 cm × 1–3 mm.

Umbels

persistent; erect; compact, 10–30-flowered, hemispheric;

pedicels 8–12 mm;

spathe bracts 2.

persistent, nodding; loose, 8–35-flowered, hemispheric;

pedicels 6–25 mm, becoming stouter in fruit, elongating and bending abruptly upward from near point of attachment;

spathe bracts 2.

Flowers

6–8 mm;

tepals spreading, lanceolate; more or less equal; rose-colored;

margins entire;

apex acuminate;

stamens more or less equaling tepals, or exserted;

ovary distinctly crested with 6 low processes;

stigma unlobed.

4–6 mm;

tepals more or less erect, elliptic-ovate; more or less equal, pink or white;

margins more or less entire;

apex more or less obtuse; at least outer tepals strongly incurved; midribs not thickened;

stamens exserted;

ovary conspicuously crested with 6 triangular processes;

stigma scarcely thickened, unlobed.

2n

=14.

=14.

Allium nevii

Allium cernuum

Distribution
[WildflowerSearch map]
[BONAP county map]
[WildflowerSearch map]
[BONAP county map]
Discussion

Wet meadows and along streams, in rocky clay soils, seasonally moist scablands. Flowering Apr–Jun. 0–1200 m. Col, ECas. WA. Native.

Flowering May–Jul. 0–1400 m. BW, Casc, CR, ECas, Est, WV. ID, WA; north to British Columbia, east to MA, southeast to AZ and Mexico. Native.

Allium cernuum is the most widespread native North American onion.

Source Flora of Oregon, volume 1, page 141
Nick Otting, Richard Brainerd, Barbara Wilson
Flora of Oregon, volume 1, page 138
Nick Otting, Richard Brainerd, Barbara Wilson
Sibling taxa
A. acuminatum, A. ampeloprasum, A. amplectens, A. anceps, A. bisceptrum, A. bolanderi, A. brandegeei, A. campanulatum, A. cernuum, A. crenulatum, A. dictuon, A. douglasii, A. falcifolium, A. fibrillum, A. geyeri, A. lemmonii, A. macrum, A. madidum, A. membranaceum, A. nevadense, A. nigrum, A. parvum, A. peninsulare, A. platycaule, A. punctum, A. robinsonii, A. sanbornii, A. schoenoprasum, A. siskiyouense, A. tolmiei, A. triquetrum, A. unifolium, A. validum, A. vineale
A. acuminatum, A. ampeloprasum, A. amplectens, A. anceps, A. bisceptrum, A. bolanderi, A. brandegeei, A. campanulatum, A. crenulatum, A. dictuon, A. douglasii, A. falcifolium, A. fibrillum, A. geyeri, A. lemmonii, A. macrum, A. madidum, A. membranaceum, A. nevadense, A. nevii, A. nigrum, A. parvum, A. peninsulare, A. platycaule, A. punctum, A. robinsonii, A. sanbornii, A. schoenoprasum, A. siskiyouense, A. tolmiei, A. triquetrum, A. unifolium, A. validum, A. vineale
Synonyms Allium douglasii var. nevii
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