Allium jepsonii

(Ownbey & Aase ex Traub) S. S. Denison & McNeal

Madroño 36: 127. 1989.

IllustratedEndemicConservation concern
Basionym: Allium sanbornii var. jepsonii Ownbey & Aase ex Traub Pl. Life 28: 63. 1972
Treatment appears in FNA Volume 26. Mentioned on page 251.

Bulbs 1–2, not clustered on stout, primary rhizome, ovoid to subglobose, 1.5–2.5 × 1–2 cm; outer coats enclosing single bulb, gray-brown, membranous, lacking cellular reticulation or cells arranged in only 2–3 rows distal to roots, ± quadrate, without fibers; inner coats light-brown or white, cells obscure, quadrate. Leaves persistent, withering from tip by anthesis, 1, basally sheathing, sheath not extending much above soil surface; blade solid, terete, 22–42 cm × 1–4 mm. Scape persistent, solitary, erect, solid, terete, 25–37 cm × 1–3 mm. Umbel persistent, erect, ± compact, 20–60-flowered, hemispheric, bulbils unknown; spathe bracts persistent, 3–4, 4–5-veined, ovate, ± equal, apex long-acuminate. Flowers campanulate, 7–8.5 mm; tepals erect, white, flushed with pink near dark-pink midveins, ovate-elliptic, ± equal, becoming papery in fruit, margins erose, apex acute to apiculate, outer tepals with reflexed tips; stamens included; anthers yellow; pollen yellow; ovary crested; processes 6, prominent, ± triangular, margins erose; style linear, equaling stamens; stigma capitate, 3-lobed, lobes slender, recurved; pedicel 7–20 mm. Seed-coat dull or shining; cells minutely roughened. 2n = 14.


Phenology: Flowering late May–early Jul.
Habitat: Clay soils, including serpentine
Elevation: 300–600 m

Discussion

Of conservation concern.

Allium jepsonii is disjunct in the foothills of the Sierra Nevada.

Selected References

None.

Lower Taxa

None.

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

... more about "Allium jepsonii"
versatile +  and dorsifixed +
cordate +  and linear +
acute +  and apiculate +
Dale W. McNeal Jr. +  and T. D. Jacobsen +
(Ownbey & Aase ex Traub) S. S. Denison & McNeal +
whorled +, opposite +  and alternate +
dilated +
Allium sanbornii var. jepsonii +
straight +
22 cm220 mm <br />0.22 m <br /> (42 cm420 mm <br />0.42 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
conspicuous +
1;several +
1.5cm +  and 2.5cm +
single +, 1 +  and 2 +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
roughened +  and smooth +
quadrate +
300–600 m +
connate-coroniform +  and dilated +
sessile +  and pedicellate +
unisexual +  and bisexual +
campanulate +
0.7 cm7 mm <br />0.007 m <br /> (0.85 cm8.5 mm <br />0.0085 m <br />) +
loculicidal +
membranaceous +  and leathery +
Clay soils, including serpentine +
paired +, paniculate +  and racemose +
white +  and light-brown +
persistent +
slender +
dark-pink +  and pink +
crested +
many;several +
spreading +  and erect +
0.7 cm7 mm <br />0.007 m <br /> (2 cm20 mm <br />0.02 m <br />) +
membranous +
zygomorphic +  and actinomorphic +
Flowering late May–early Jul. +
triangular +
2 +  and 3 +
persistent +
25cm +  and 37cm +
1mm +  and 3mm +
shining +  and dull +
wind-distributed +
1 +  and many +
obovoid +
Illustrated +, Endemic +  and Conservation concern +
adnate +  and free +
1 +  and several +
Allium jepsonii +
species +
flushed;white +
persisting +
distinct +
ovate-elliptic +
sepaloid +  and petaloid +
narrower +
20-60-flowered +
persistent +
hemispheric +
9 +, 8 +  and 7 +