Table 1.

Species included in the experiment

	Thymus pulegioides	Achillea millefolium	Leontodon hispidus	Armeria maritima	Linum catharticum	Euphrasia officinalis	Rhinanthus serotinus	Centaurea jacea
Germination season	Autumn	Autumn	Autumn	Autumn	Spring	Spring	Spring	Spring
Seed mass category*	Small	Small	Large	Large	Small	Small	Large	Large
Seed mass (mg)†	0·12	0·17	0·90	1·42	0·11	0·12	1·60	1·94
No. of seeds sown per plot	100	100	50	100	100	100	50	100

*Seed mass categories: small (<0·5 mg) and large (0·5–2 mg). The nomenclature follows Wisskirchen and Haeupler (1998).

^†Mean seed mass of 16 × 50 seeds per species is given.