Allium tribracteatum

Torrey

Pacif. Railr. Rep. 4(5): 148. 1857.

IllustratedEndemicConservation concern
Treatment appears in FNA Volume 26. Treatment on page 269. Mentioned on page 232, 268.

Bulbs generally 2–5+, not clustered on stout primary rhizome, ovoid, 1–2 × 0.8–1.8 cm; outer coats enclosing 1 or more bulbs, brownish, membranous, prominently cellular-reticulate, cells irregularly arranged, ± transversely elongate, curved, without fibers; inner coats white, cells obscure, ± transversely elongate, irregularly arranged, curved. Leaves usually deciduous with scape, withering from tip at anthesis, 2, basally sheathing, sheaths not extending much above soil surface; blade solid, flat or broadly channeled, ± falcate, 12–20 cm × 1–3.5 mm, margins entire. Scape usually forming abcission layer and deciduous with leaves after seeds mature, frequently breaking at this level after pressing, solitary, erect, solid, terete, 2–7 cm × 0.5–1.5 mm. Umbel persistent, erect, compact, 10–30-flowered, hemispheric, bulbils unknown; spathe bracts persistent, (2–) 3 (–4), 4–5-veined, ovate, ± equal, apex abruptly acuminate to apiculate. Flowers campanulate, 6.5–8 mm; tepals erect, white to pink with dark-pink or purplish midvein, lanceolate to ± elliptic, ± equal, becoming papery in fruit, margins entire, apex acute; stamens included; anthers purple; pollen gray; ovary crested; processes 3, acute, ± lateral, margins entire; style linear, shorter than stamens; stigma capitate, scarcely thickened, unlobed; pedicel 6–9 mm. Seed-coat dull; cells ± smooth. 2n = 14.


Phenology: Flowering Mar–May.
Habitat: Rocky, volcanic soils
Elevation: 1300–3000 m

Discussion

Of conservation concern.

Allium tribracteatum is known only from the Sierra Nevada in Tuolumne County.

Selected References

None.

Lower Taxa

None.

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

... more about "Allium tribracteatum"
versatile +  and dorsifixed +
cordate +  and linear +
acute +, abruptly acuminate +  and apiculate +
Dale W. McNeal Jr. +  and T. D. Jacobsen +
Torrey +
whorled +, opposite +  and alternate +
dilated +
straight +
12 cm120 mm <br />0.12 m <br /> (20 cm200 mm <br />0.2 m <br />) +
falcate +, channeled +  and flat +
0.1 cm1 mm <br />0.001 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
conspicuous +
1;several +
1cm +  and 2cm +
2 +  and 5 +
0.8 cm8 mm <br />0.008 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
roughened +  and smooth +
elongate +
membranous +
1300–3000 m +
connate-coroniform +  and dilated +
sessile +  and pedicellate +
unisexual +  and bisexual +
campanulate +
0.65 cm6.5 mm <br />0.0065 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
loculicidal +
membranaceous +  and leathery +
Rocky, volcanic soils +
paired +, paniculate +  and racemose +
deciduous +
purplish +  and dark-pink +
gray +  and brown +
crested +
many;several +
spreading +  and erect +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
membranous +
zygomorphic +  and actinomorphic +
Flowering Mar–May. +
Pacif. Railr. Rep. +
deciduous +
2cm +  and 7cm +
0.5mm +  and 1.5mm +
wind-distributed +
1 +  and many +
obovoid +
Illustrated +, Endemic +  and Conservation concern +
adnate +  and free +
1 +  and several +
Allium tribracteatum +
species +
persisting +
distinct +
lanceolate +  and more or less elliptic +
sepaloid +  and petaloid +
narrower +
10-30-flowered +
persistent +
hemispheric +
9 +, 8 +  and 7 +