Papaver L.

1. Papaver L. View in CoL 1

Herbs with latex. Sepals 2, free, caducous. Petals 4, entire, often bright red, crumpled in bud, usually caducous. Stigmas 4-15, sessile over the placentae. Capsulesubcylindrical to globose, opening by pores below the stigmatic disc. Aril absent. Literature: General: F.Fedde in Engler, Pflanzenreich 40 (IV. 104): 288-386 (1909). Sect. Scapiflora'. A. C. Fabergé, Jour. Genet. 44: 169-93(1942); 45: 139-70(1943); 46: 125-49 (1944). G. Knaben, Op.Bot.(Lund) 2 (3): 1-74 (1959); 3 (3): 1-96 (1959). F.Markgrafin G.Hegi, III. Fl. Mitteleur. ed. 2, 4 (1): 29-49 (1958). 1 Scaposeperennialswithsolitary,usuallyyellow, flowers

(17-26). alpinum group 1 Annuals,biennials or perennials with cauline leaves; flowers usuallyredorpurple 2 Perennials;non-floweringstems present 3 Robust,withstems up to 100 cm; petals5 -8 cm 16. orientale 3 Slender,withstemsup to 50 cm; petals less than 4 cm

15. rupifragum 2 Annualsor biennials;all stems bearing flowers 4 Plant glaucous; leaves lobed, rarely pinnatisect, upper amplexicaul 1. somniferum Plantnotor 4 onlyslightlyglaucous;leavesusuallydeeply dividedtopinnatisect,upper not amplexicaul

5 Capsule setose; stigmatic disc convex

6 Capsule 1 - 5-2 cm, oblong-clavate 10. argemone

6 Capsule 1-1-5 cm, ellipsoid to subglobose

7 Bud broadly ovoid, subglabrous 12. apulum

7 Bud subglobose, obviously hairy

8 Capsule 1 -1-5 cm, elongate-ellipsoid 11. nigrotinctum

8 Capsule 1 -1- 25 cm, subglobose 13. hybridum

5 Capsule glabrous; stigmatic disc flat or convex

9 Capsule subglobose to broadly obovoid, less than twice as long as wide 2. rhoeas

9 Capsule davate to oblong-elliptical, at least twice as long as wide

10 Stigmatic disc deciduous on mature capsule, with distinctly keeled rays (Lower Volga) 14. macrostomum

10 Stigmatic disc not deciduous, ± flat (3-9). dubium group