OregonFlora: Allium constrictum vs. Allium falcifolium

	Allium constrictum	Allium falcifolium
		sickle-leaf onion
Bulbs		1–5+; rhizomes absent; increase bulbs absent or more or less equaling parent bulbs, never appearing as a basal cluster; ovoid; outer coats enclosing renewal and increase bulbs, membranous, lacking cellular reticulation or cells arranged in only 2–3 rows adjacent to roots; more or less quadrate; without fibers.
Leaves		usually deciduous with scape, withering from tip at anthesis, 2; blades solid; flat, falcate, 8–21 cm × 2–8 mm.
Scapes		usually forming abscission layer and deciduous with leaves after seeds mature; solitary; erect; solid, strongly flattened, winged distally, 5–25 cm × 1–4 mm.
Umbels		persistent; erect; compact to more or less loose, 10–30-flowered, hemispheric; pedicels 8–15 mm; spathe bracts 2.
Flowers		9–15 mm; tepals erect, lanceolate; more or less equal; reddish purple or dingy white; at least inner margins denticulate; apex long-acuminate; stamens included; ovary crested with 3 low processes; stigma unlobed.
2n		=14.

	Allium constrictum	Allium falcifolium
Distribution	[WildflowerSearch map] [BONAP county map]	[WildflowerSearch map] [BONAP county map]
Discussion		Heavy, rocky, clay soils, usually serpentine, rocky openings to savanna. Flowering Apr–Jun. 200–1700 m. Casc, Sisk. CA. Native.
Source		Flora of Oregon, volume 1, page 139 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. 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	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. 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
Web links	Local floras: WA Local Web sites: Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: CA, OR Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria, Turner Photog. WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Allium constrictum

Allium falcifolium

sickle-leaf onion

Bulbs

1–5+;

rhizomes absent; increase bulbs absent or more or less equaling parent bulbs, never appearing as a basal cluster; ovoid;

outer coats enclosing renewal and increase bulbs, membranous, lacking cellular reticulation or cells arranged in only 2–3 rows adjacent to roots; more or less quadrate; without fibers.

Leaves

usually deciduous with scape, withering from tip at anthesis, 2;

blades solid; flat, falcate, 8–21 cm × 2–8 mm.

Scapes

usually forming abscission layer and deciduous with leaves after seeds mature; solitary; erect; solid, strongly flattened, winged distally, 5–25 cm × 1–4 mm.

Umbels

persistent; erect; compact to more or less loose, 10–30-flowered, hemispheric;

pedicels 8–15 mm;

spathe bracts 2.

Flowers

9–15 mm;

tepals erect, lanceolate; more or less equal; reddish purple or dingy white; at least inner margins denticulate;

apex long-acuminate;

stamens included;

ovary crested with 3 low processes;

stigma unlobed.

=14.