Hemerocallis lilioasphodelus

Linnaeus

Sp. Pl. 1: 324. 1753.

Common names: Yellow daylily lemon daylily
Introduced
Synonyms: Hemerocallis flava (Linnaeus) Linnaeus
Treatment appears in FNA Volume 26. Treatment on page 220. Mentioned on page 219.

Plants 5–10 dm; roots enlarged, fibrous. Leaf-blade dark green, 5–6.5 dm × 0.8–1.5 cm. Scape closely branched distally, 8–12-flowered, taller than foliage. Flowers often remaining open into night, fragrance strongly sweet, lemony; perianth-tube shortly funnelform, 1.5–2.5 cm; tepals uniformly pale to bright lemon yellow, veins parallel; outer tepals 5–7 × 1–1.3 cm, margins smooth; inner tepals 5–7.5 × 1–2 cm, margins smooth; filaments 3–3.5 cm; anthers 2–3 mm; ovary 5–6 mm; style white to yellow, 7–8 cm; pedicel 2–4 mm. Capsules fully developed, oblongelliptic, (2–) 3–4 × (1–) 1.5–2 cm. Seeds black, round or angular by compression, 3–5 mm, shiny. 2n = 22.


Phenology: Flowering summer.
Habitat: Roadsides, waste places, open woods
Elevation: 0–500 m

Distribution

Introduced; N.B., Ont., Que., Ark., Conn., Ill., Ind., Ky., Maine, Md., Mass., Mich., Minn., Miss., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., Tex., Vt., Va., W.Va., Wis., e Asia, naturalized Europe

Discussion

Hemerocallis lilioasphodelus was an early introduction to Europe, where it naturalized, and then to North America (W. J. Dress 1955; Hu S. Y. 1968; W. B. Zomlefer 1998). This diploid species escapes only sporadically, unlike the more aggressive H. fulva, with true naturalization frequently questioned (W. B. Zomlefer 1998).

Selected References

None.

Lower Taxa

None.

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

dorsifixed +
linear-oblong +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Gerald B. Straley† +  and Frederick H. Utech +
Linnaeus +
dilated +
reticulate-veined +  and parallel-veined +
sheathing +  and involucrate +
tunicate +  and scaly +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
3 cm30 mm <br />0.03 m <br /> (4 cm40 mm <br />0.04 m <br />) +
oblongelliptic +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Yellow daylily +  and lemon daylily +
N.B. +, Ont. +, Que. +, Ark. +, Conn. +, Ill. +, Ind. +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, R.I. +, Tex. +, Vt. +, Va. +, W.Va. +, Wis. +, e Asia +  and naturalized Europe +
0–500 m +
connate-coroniform +  and dilated +
3 cm30 mm <br />0.03 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
sessile +  and pedicellate +
ephemeral +  and diurnal +
unisexual +  and bisexual +
loculicidal +
Roadsides, waste places, open woods +
umbellate +, cymose +  and spicate +
paired +, paniculate +  and racemose +
5 cm50 mm <br />0.05 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
1cm +  and 2cm +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
persistent +
5 cm50 mm <br />0.05 m <br /> (7 cm70 mm <br />0.07 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
many;several +
distinct +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
zygomorphic +  and actinomorphic +
Flowering summer. +
contractile +
enlarged +
8-12-flowered +  and branched +
wind-distributed +
angular +  and round +
Introduced +
staminodial +
1 +  and several +
capitate +  and 3-lobed +
white +  and yellow +
3 (?) +  and 1 (?) +
7 cm70 mm <br />0.07 m <br /> (8 cm80 mm <br />0.08 m <br />) +
Hemerocallis flava +
Hemerocallis lilioasphodelus +
Hemerocallis +
species +
yellow;uniformly pale;bright lemon +
sepaloid +  and petaloid +
campanulate +
narrower +
rhizomatous +  and scapose +
3 +  and 2 +