Allium dictuon

H. St. John

Proc. Biol. Soc. Wash. 50: 3, fig. 1. 1937.

IllustratedEndemicConservation concern
Treatment appears in FNA Volume 26. Treatment on page 261. Mentioned on page 231, 262.

Bulbs usually solitary, forming rhizomes; rhizomes 1–2, terminated by 1–3 new bulbs, short, slender; parent bulb disappearing by anthesis except for still-functional roots and bulb coats, not basally clustered, oblique-ovoid, 1–1.5 × 0.9–1.5 cm; outer coats not enclosing bulbs, pale-brown, prominently cellular-reticulate, membranous, cells polygonal to oblong, walls thick, obscurely sinuous, without fibers; inner coats white, cells ± transversely elongate, intricately contorted. Leaves persistent, withering from tip by anthesis, 2–3, basally sheathing, sheaths not extending much above soil surface; blade solid, subterete to ± channeled, 10–28 cm × 1–2 mm, margins entire. Scape persistent, solitary, erect, solid, terete, 20–40 cm × 1–3 mm. Umbel persistent, erect, loose, 10–25-flowered, hemispheric, bulbils unknown; spathe bracts persistent, 2, 3-veined, lanceolate to lanceovate, ± equal, apex acuminate. Flowers campanulate, 11–16 mm; tepals erect, pink to rose-purple, lanceolate, unequal, outer tepal longer and wider than inner, becoming rigid and keeled in fruit, margins finely denticulate (inner tepal more prominently so), apex acute to narrowly obtuse, becoming involute and appearing long-acuminate, flaring toward tips; stamens included; anthers yellow; pollen yellow; ovary crested; processes 3, central, 2-lobed, rounded, minute, margins entire; style linear, equaling stamens; stigma capitate, scarcely thickened, obscurely 3-lobed; pedicel 10–25 mm. Seed-coat shining; cells minutely roughened. 2n = 14.


Phenology: Flowering Jun–Jul.
Habitat: Rocky, sandy, basaltic soil
Elevation: 1500 m

Discussion

Of conservation concern.

Allium dictuon is known only from the vicinity of Weller’s Butte, Blue Mountains. It differs from A. acuminatum by its rhizomatous habit, in which it resembles A. bolanderi, and in the cellular pattern on the inner bulb coats.

Selected References

None.

Lower Taxa

None.

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

... more about "Allium dictuon"
versatile +  and dorsifixed +
cordate +  and linear +
Dale W. McNeal Jr. +  and T. D. Jacobsen +
H. St. John +
whorled +, opposite +  and alternate +
dilated +
straight +
10 cm100 mm <br />0.1 m <br /> (28 cm280 mm <br />0.28 m <br />) +
subterete +  and more or less channeled +
1mm;2mm +
conspicuous +
1 +  and 3 +
roughened +  and smooth +
elongate +, polygonal +  and oblong +
1500 m +
connate-coroniform +  and dilated +
sessile +  and pedicellate +
unisexual +  and bisexual +
1.1 cm11 mm <br />0.011 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
loculicidal +
membranaceous +  and leathery +
Rocky, sandy, basaltic soil +
paired +, paniculate +  and racemose +
persistent +
denticulate +
longer and wider +
crested +
many;several +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
oblique-ovoid +
0.9 cm9 mm <br />0.009 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
spreading +  and erect +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
membranous +
zygomorphic +  and actinomorphic +
Flowering Jun–Jul. +
rounded +  and 2-lobed +
Proc. Biol. Soc. Wash. +
1 +  and 2 +
persistent +
20cm +  and 40cm +
1mm +  and 3mm +
wind-distributed +
1 +  and many +
obovoid +
Illustrated +, Endemic +  and Conservation concern +
adnate +  and free +
1 +  and several +
Allium dictuon +
species +
pink;rose-purple +
persisting +
distinct +
lanceolate +
unequal +
flaring +  and long-acuminate +
sepaloid +  and petaloid +
narrower +
10-25-flowered +
persistent +
sinuous +
9 +, 8 +  and 7 +