Allium rotundum

Linnaeus

Sp. Pl. ed. 2, 1: 423. 1762.

Treatment appears in FNA Volume 26. Treatment on page 244. Mentioned on page 224, 228, 245.

Bulbs 1–50+, ovoid, 0.2–1.5 × 0.2–1 cm; outer coats surrounding numerous, very dark purple bulbels, usually white or greenish, membranous, sometimes breaking into ± parallel, fibrous strips; inner coats white, cells obscure, quadrate. Leaves persistent, 2–5, sheathing 1/3–1/2 scape; blade solid, flat or channeled, carinate, 15–40 cm × 2–5 (–7) mm, margins entire. Scape persistent, solitary, erect, ± solid, 25–90 cm × 1–4 mm. Umbel persistent, erect, very dense, 80–200-flowered, globose, bulbils unknown; spathe bracts caducous, 2, 7–12-veined, lanceolate, ± equal, apex narrowed to beak, beak to 2 cm. Flowers campanulate, 4–7 mm; tepals erect, purple, or inner with broad whitish margins and purple midvein, oblong to ovate, ± equal, becoming keeled and ± rigid in fruit, margins entire, apex acute to obtuse; stamens included; filaments: outer unlobed, inner with 2 prominent teeth on either side of anther, teeth 2–3 times anther-bearing portion, usually papillose to ciliate; anthers yellow or purple; pollen light yellow to white; ovary crestless; style linear, ± equaling anther-bearing portion of stamens; stigma capitate, unlobed; pedicels 5–30 mm, outer much shorter than inner. Seed-coat dull; cells each with central papilla.


Phenology: Flowering May–Jul.
Habitat: Disturbed fields and roadsides

Distribution

Introduced; Mich., c, s Europe

Discussion

Allium rotundum is native to central and southern Europe. It is reported as established in southern Michigan, and is to be expected elsewhere in the Great Lakes region.

Selected References

None.

Lower Taxa

None.

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

... more about "Allium rotundum"
purple +  and yellow +
versatile +  and dorsifixed +
cordate +  and linear +
acute +  and obtuse +
Dale W. McNeal Jr. +  and T. D. Jacobsen +
Linnaeus +
whorled +, opposite +  and alternate +
dilated +
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
straight +
15 cm150 mm <br />0.15 m <br /> (40 cm400 mm <br />0.4 m <br />) +
carinate +, channeled +  and flat +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
conspicuous +
1;several +
0.2cm +  and 1.5cm +
1 +  and 50 +
0.2 cm2 mm <br />0.002 m <br /> (1 cm10 mm <br />0.01 m <br />) +
dark purple +
roughened +  and smooth +
quadrate +
Mich. +, c +  and s Europe +
connate-coroniform +  and dilated +
sessile +  and pedicellate +
unisexual +  and bisexual +
campanulate +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
loculicidal +
membranaceous +  and leathery +
Disturbed fields and roadsides +
paired +, paniculate +  and racemose +
keeled +, oblong +  and ovate +
persistent +
greenish +  and white +
crested;3-lobed +
many;several +
spreading +  and erect +
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
membranous +
zygomorphic +  and actinomorphic +
Flowering May–Jul. +
light yellow +  and white +
anther-bearing +
Sp. Pl. ed. +
persistent +
25cm +  and 90cm +
flattened +  and terete +
1mm +  and 4mm +
wind-distributed +
1 +  and many +
obovoid +
adnate +  and free +
1 +  and several +
Allium rotundum +
species +
persisting +
distinct +
petal-like +
papillose +
2-3 times anther-bearing portion +
sepaloid +  and petaloid +
narrower +
80-200-flowered +
persistent +
globose +
9 +, 8 +  and 7 +