Flora of North America species comparison

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Papaver argemone

Papaver walpolei

long prickly-head poppy, pale rough fruit poppy, prickly pod poppy

walpole's poppy
Habit Plants to 5 dm, hispid. Plants densely cespitose, to 1(-2) dm.
Stems

simple or branching.

Leaves

to 12[-20] cm.

to 4 cm;

petiole to 3/4 length of leaf;

blade light green abaxially, dark green adaxially, sometimes glaucous, short-lanceolate, unlobed or 1x-lobed with 1(-2) pair(s) of lateral lobes, glabrous adaxially;

terminal lobe rarely with small secondary lobes, apex rounded.
Inflorescences

peduncle appressed-hispid.

scapes erect, glabrate to hispid.
Flowers

petals dark red, sometimes with dark basal spot, to 25 mm;

anthers pale blue;

stigmas 4-6, disc convex and radially vaulted.

to 3 cm diam.;

petals yellow, or white with yellow basal spot;

anthers yellow;

stigmas 4-5, disc convex.
Capsules

sessile, oblong to clavate, distinctly ribbed, to 2 cm, sparsely and weakly setose.

turbinate to ellipsoid-obovoid, to 1 cm, sparsely to densely hirsute, trichomes light brown to black.
2n

= 14.

Papaver argemone

Papaver walpolei
Phenology Flowering spring–summer. Flowering late May–Aug.
Habitat Fields and disturbed sites Exposed tundra uplands, especially calcareous fellfield and river gravels
Elevation 0-300 m (0-1000 ft) 0-900 m (0-3000 ft)
Distribution
from FNA
ID; OR; PA; UT; Europe; sw Asia [Introduced in North America]
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; YT; Asia (Russian Far East, Chukotka)
[BONAP county map]
Discussion

In its native range, Papaver argemone is a complex of five diploid, tetraploid, and hexaploid subspecies (J. W. Kadereit 1986, 1990). Apparently two or more of these have been represented among the crop weeds and ballast waifs introduced in North America, where plants are difficult to assign to particular subspecies. The species should be expected elsewhere in the flora. Collections attributed to Maryland, Ohio, and Virginia are known also, but they lack more specific citations of locality.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 3. FNA vol. 3.
Parent taxa Papaveraceae > Papaver > sect. Argemonidium Papaveraceae > Papaver > sect. Meconella
Sibling taxa
P. alboroseum, P. californicum, P. dubium, P. gorodkovii, P. hybridum, P. lapponicum, P. macounii, P. mcconnellii, P. nudicaule, P. orientale, P. pygmaeum, P. radicatum, P. rhoeas, P. somniferum, P. walpolei
P. alboroseum, P. argemone, P. californicum, P. dubium, P. gorodkovii, P. hybridum, P. lapponicum, P. macounii, P. mcconnellii, P. nudicaule, P. orientale, P. pygmaeum, P. radicatum, P. rhoeas, P. somniferum
Synonyms P. walpolei var. sulphureomaculatum
Name authority Linnaeus: Sp. Pl. 1: 506. (1753) A. E. Porsild: Rhodora 41: 231, plate 552, figs. 4-10. (1939)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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