Helianthemum nummularium, (L.)

9. H. nummularium (L.) Miller View in CoL , Gard. Diet. ed. 8, no. 12 (1768)

( H. chamaecistus Miller , H. vulgare Gaertner ).

5-50 cm; branches procumbent or ascending. Leaves 5-50 x 2-15 mm, oblong or lanceolate to ovate or orbicular, subglabrous to pubescent above, white-tomentose, rarely greenish, beneath, with flat or slightly revolute margins. Stipules lanceolate to linear-lanceolate, longer than the petioles. Cymes 1 - to 12-flowered, unilateral. Petals 6-18 mm, golden-yellow, rarely cream, pale yellow, white, orange or pink. Capsule about equalling the sepals. 2« = 20. Grassy and rocky places, usually on basic soils. Most of Europe except the extreme north. All except Az Fa Is No Rs (N) Sb.

A complex species variously divided by different authors. A modification of the treatment in Hegi, Ul. Fl. Mitteleur. 5(1): 565-571 (1925) is followed here. 1 Leaves green on both surfaces 2 Leaves glabrous, or the margins and midrib ciliate 3 Petals yellow (e) subsp. glabrum 3 Petals pink (f) subsp. semiglabrum 2 Leaves with long hairs on surface and margins 4 Sepals tomentose or pubescent between the ribs; inner sepals

5-8 mm; petals 8-12 mm (d) subsp. obscurum 4 Sepals glabrous between the ribs; inner sepals 7-10 mm;

petals 10-18 mm (h) subsp. grandiflorum 1 Leaves grey- or white-tomentose, at least beneath 5 Petals c. 10 mm, pink 6 Leaves white-tomentose beneath (c) subsp. pyrenaicum 6 Leaves greyish-pubescent beneath (g) subsp. berterianum 5 Petals yellow, orange, red-spotted at the base or rarely white 7 Leaves 2-5(-7) mm wide; petals 6—10(—12) mm

(a) subsp. nummularium 7 Leaves 5-15 mm wide; petals (8-)10-15 mm

(b) subsp. tomentosum