Helianthemum oelandicum (material from S Öl in cultivation) drawn for Flora Nordica 6 by Marie Widén.
A: var. oelandicum in early June:
all inflorescences
borne at the apex of branches
of the previous year's growth.

Helianthemum oelandicum var. oelandicumInfructescence (developed from the first flowering, in June) borne on last year's growthInflorescence borne on the current year's growthInflorescence borne on the current year's growth

 B: var. canescens in late July
with one infructescence (developed from a June inflorescence)
borne at the apex of a branch of the previous year's growth,
and two inflorescences borne on the current year's growth.

Helianthemum oelandicum var. canescensInflorescence borne on the current year's growthInflorescence borne on the current year's growthInfructescence (developed from the first flowering, in June) borne on last year's growth