Ornithogalum umbellatum

Linnaeus

Sp. Pl. 1: 307. 1753.

Common names: Nap-at-noon sleepy dick
IntroducedIllustrated
Treatment appears in FNA Volume 26. Treatment on page 317. Mentioned on page 319.

Plants (10–) 20–30 (–40) cm; bulbs renewed each year, 1–2 × 1–2.5 (–3.5) cm; bulblets numerous. Leaves 4–6 (–9); blade with white adaxial stripe, 20–30 cm × 3–5 (–8) mm. Scape 1–3 dm. Inflorescences corymbose, (4–) 8–20-flowered, flat-topped; bracts to 4 cm. Flowers erect; perianth opening flat or bowl-shaped in sun, closing at night, remaining closed on cloudy days; tepals white with wide green abaxial stripe, lanceolate to oblong-lanceolate, 15–22 (–30) × 7–8 mm; stamens: outer 5–7 × 2–3 mm, inner 6–8 × 2–3 mm; filaments simple, flattened; anthers 2–4 mm; ovary ovoid to obovoid, strongly 6-angled, 5–6 mm; style 3–4 mm; lower pedicels 2–6 cm. Capsules oblong-ovoid. 2n = 18, 20, 27, 28, 35, 36, 42, 44, 45, 54, 72, 90, 108.


Phenology: Flowering spring.
Habitat: Roadsides, open forests, waste places, dumps
Elevation: 0–1500 m

Distribution

V26 638-distribution-map.jpg

Introduced; B.C., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., Que., Ala., Ark., Conn., Del., D.C., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Miss., Mo., Nebr., N.H., N.J., N.Y., N.C., Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Tex., Utah, Vt., Va., Wash., W.Va., Wis., Europe, n Africa, Asia, Middle East, expected elsewhere

Discussion

Planted as a garden ornamental, Ornithogalum umbellatum produces many offsetting bulblets that are transported in soil and can become rampant weeds. Adding to the vegetative vigor of this species may be its aneuploid-polyploid karyology (T. W. J. Gadella and L. van Raamsdonk 1981; L. van Raamsdonk 1984). The flowers are noteworthy for their regularity in opening just before noon and closing again before sunset.

Two digitalis-like glycosides, convallatoxin and convalloside, poisonous to humans and livestock, are found throughout the plant, but are concentrated in the bulbs and the flowers (W. H. Blackwell 1990; K. F. Lampe and M. A. McCann 1985; D. G. Spoerke Jr. and S. C. Smolinske 1990).

Selected References

None.

Lower Taxa

None.

"dm" is not declared as a valid unit of measurement for this property."thicker" is not a number.

... more about "Ornithogalum umbellatum"
108 +, 90 +, 72 +, 54 +, 45 +, 44 +, 42 +, 36 +, 35 +, 28 +, 27 +, 20 +  and 18 +
dorsifixed +
cordate +  and linear +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Gerald B. Straley† +  and Frederick H. Utech +
Linnaeus +
whorled +, opposite +  and alternate +
dilated +
reticulate-veined +  and parallel-veined +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
20 cm200 mm <br />0.2 m <br /> (30 cm300 mm <br />0.3 m <br />) +
linear +  and lanceolate +
3mm;5mm +
sheathing +  and involucrate +
membranous +
2.5 cm25 mm <br />0.025 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
1cm +  and 2cm +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
oblong-ovoid +
Nap-at-noon +  and sleepy dick +
B.C. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, Ont. +, Que. +, Ala. +, Ark. +, Conn. +, Del. +, D.C. +, Ga. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Miss. +, Mo. +, Nebr. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Oreg. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Utah +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +, Europe +, n Africa +, Asia +, Middle East +  and expected elsewhere +
0–1500 m +
flattened +
sessile +  and pedicellate +
unisexual +  and bisexual +
loculicidal +
Roadsides, open forests, waste places, dumps +
(4-)8-20-flowered +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
2mm +  and 3mm +
persistent +
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
hairy +  and smooth +
6-angled;ovoid;obovoid +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
many;several +
zygomorphic +  and actinomorphic +
Flowering spring. +
wind-distributed +
globose +  and ovoid +
W2 +, W1 +, Introduced +  and Illustrated +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
3-lobed +  and entire +
1 +  and several +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
bowl--shaped +  and flat +
Ornithogalum umbellatum +
Ornithogalum +
species +
2.2 cm22 mm <br />0.022 m <br /> (3 cm30 mm <br />0.03 m <br />) +
distinct +
15mm;22mm +
lanceolate +  and oblong-lanceolate +
unequal +
7mm;8mm +
sepaloid +  and petaloid +
narrower +
3 +  and 2 +
11 +, 9 +, 8 +, 7 +, 6 +, 5 +  and 3 +