Stylophorum diphyllum

(Michaux) Nuttall

Gen. N. Amer. Pl. 2: 7. 1818.

Common names: Celandine-poppy mock poppy yellow-poppy wood-poppy
EndemicIllustrated
Basionym: Chelidonium diphyllum Michaux Fl. Bor.-Amer. 1: 309. 1803
Synonyms: Stylophorum ohiense Sprengel
Treatment appears in FNA Volume 3.

Plants to 5 dm, downy. Stems simple or branching. Leaves to 5 dm; petiole to 2 dm; blade pale abaxially, deeply 5-7-lobed; margins irregularly dentate or crenate. Flowers: pedicels 25-80 mm; sepals ca. 15 mm; petals yellow, obovate, 2-3 cm wide; style 3-6 mm. Capsules ellipsoid, 20-35 mm, pubescent. Seeds pale-brown, reticulate-pitted. 2n = 20 (cult.).


Phenology: Flowering spring.
Habitat: Moist deciduous woods, thickets, and cedar barrens, often on slopes, occasionally in fields or on shaded dunes, in loam or sand
Elevation: 100-600 m

Distribution

V3 721-distribution-map.gif

Ont., Ala., Ark., Ill., Ind., Ky., Mich., Mo., Ohio, Tenn., Va., W.Va.

Discussion

Vegetatively, this native species closely resembles the more frequent and widespread Chelidonium majus, introduced from Eurasia. Various authors have reported Stylophorum diphyllum from western Pennsylvania, but W. E. Buker and S. A. Thompson (1986) could not confirm its past or current native presence there.

Selected References

None.

Lower Taxa

None.

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

... more about "Stylophorum diphyllum"
(Michaux) Nuttall +
Chelidonium diphyllum +
palmate +  and subpalmate +
5-7-lobed +
[2-](3-)4-valved +
ellipsoid +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Celandine-poppy +, mock poppy +, yellow-poppy +  and wood-poppy +
Ont. +, Ala. +, Ark. +, Ill. +, Ind. +, Ky. +, Mich. +, Mo. +, Ohio +, Tenn. +, Va. +  and W.Va. +
100-600 m +
sessile +, pedicellate +  and symmetric +
transverse +, poricidal +, valvate +  and dehiscence +
Moist deciduous woods, thickets, and cedar barrens, often on slopes, occasionally in fields or on shaded dunes, in loam or sand +
few-flowered +  and umbelliform +
paniculate +  and racemose +
terminal +  and axillary +
sessile +, petiolate +  and simple +
alternate +  and opposite or whorled +
cauline +  and basal +
crenate +  and dentate +
1-2-locular or +  and incompletely completely multilocular +
2.5 cm25 mm <br />0.025 m <br /> (8 cm80 mm <br />0.08 m <br />) +
distinct +
obovate +
2 times number of sepals +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Flowering spring. +
[2-](3-)4-carpellate +
Gen. N. Amer. Pl. +
yellow +  and orange +
pale-brown +
reticulate-pitted +
distinct +
obovate +
15 cm150 mm <br />0.15 m <br /> (?) +
Endemic +  and Illustrated +
branching +  and simple +
decumbent +, spreading +  and erect +
3-4(-5)-lobed +
distinct +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Stylophorum ohiense +
Stylophorum diphyllum +
Stylophorum +
species +