Allium constrictum

(Ownbey & Mingrone) P. M. Peterson

Syst. Bot. 13: 211. 1988.

EndemicConservation concern
Basionym: Allium douglasii var. constrictum Ownbey & Mingrone in C. L. Hitchcock et al., Vasc. Pl. Pacif. N.W. 1: 747. 1969
Treatment appears in FNA Volume 26. Mentioned on page 267.

Bulbs 1–5+, not clustered on stout, primary rhizome, ovoid, 1–1.5 × 0.8–1.4 cm; outer coats enclosing 1 or more bulbs, brownish, membranous, lacking cellular reticulation or cells arranged in only 2–3 rows distal to roots, ± quadrate, without fibers; inner coats white, cells obscure, quadrate. Leaves usually persistent, green at anthesis, 2, basally sheathing, sheaths not extending much above soil surface; blade solid, flat, broadly channeled, falcate, 10–35 cm × 1–3 (–5) mm, margins entire. Scape persistent, solitary, erect, solid, terete, enlarged apically but distinctly constricted just proximal to inflorescence, 15–20 cm × 1.5–4 mm. Umbel persistent, erect, compact, 15–30-flowered, hemispheric to globose, bulbils unknown; spathe bracts persistent, 3, 5–7-veined, ovate, ± equal, apex acute. Flowers ± stellate, 7–8 mm; tepals spreading, light pink to rose with prominent green or reddish midribs, narrowly lanceolate, ± equal, becoming papery in fruit, margins entire, apex acuminate; stamens exserted; anthers blue-gray; pollen light blue to gray; ovary crested; processes 6, 2 per lobe, low, rounded, margins entire; style exserted, linear; stigma capitate, unlobed; pedicel 10–20 mm. Seed-coat shining; cells smooth. 2n = 14.


Phenology: Flowering May–Jul.
Habitat: Shallow, lithosolic soils, often dry and sandy
Elevation: 300–500 m

Discussion

Of conservation concern.

Allium constrictum is known only from Douglas, Grant, and Lincoln counties.

Selected References

None.

Lower Taxa

None.

"thicker" is not a number."broad" is not a number.

... more about "Allium constrictum"
versatile +  and dorsifixed +
cordate +  and linear +
Acuminate (?) +  and Acute (?) +
Dale W. McNeal Jr. +  and T. D. Jacobsen +
(Ownbey & Mingrone) P. M. Peterson +
whorled +, opposite +  and alternate +
dilated +
Allium douglasii var. constrictum +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
straight +
10 cm100 mm <br />0.1 m <br /> (35 cm350 mm <br />0.35 m <br />) +
falcate +  and channeled +
1mm;3mm +
conspicuous +
1cm +  and 1.5cm +
1 +  and 5 +
0.8 cm8 mm <br />0.008 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
roughened +  and smooth +
quadrate +
300–500 m +
connate-coroniform +  and dilated +
sessile +  and pedicellate +
unisexual +  and bisexual +
0.7 cm7 mm <br />0.007 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
loculicidal +
membranaceous +  and leathery +
Shallow, lithosolic soils, often dry and sandy +
paired +, paniculate +  and racemose +
persistent +
reddish +, green +  and prominent +
gray +  and brown +
crested +
many;several +
spreading +  and erect +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
membranous +
zygomorphic +  and actinomorphic +
Flowering May–Jul. +
light blue +  and gray +
2 (?) +  and 6 (?) +
lacking +  and 1 +
2 (?) +  and 3 (?) +
persistent +
15cm +  and 20cm +
constricted +  and enlarged +
1.5mm +  and 4mm +
wind-distributed +
1 +  and many +
obovoid +
Endemic +  and Conservation concern +
adnate +  and free +
1 +  and several +
Allium constrictum +
species +
light pink;rose +
persisting +
distinct +
lanceolate +
sepaloid +  and petaloid +
narrower +
15-30-flowered +
persistent +
9 +, 8 +  and 7 +