Table 1. Plant species of each community included in this study.

Their family, the levels at which the trade-off was calculated (F: fruit; I: infructescence; P: plant), the pollen limitation indices (PL), and the average number of ovules per flowers or inflorescence are given. PL was estimated as 1- seed set of open pollinated plants / seed set of hand-pollinated plants (see [36], for details). Nomenclature follows [68].

Community	Species	Family	Levels	PL	Ovu. / fl.	Community	Species	Family	Levels	PL	Ovu./flo.
Lowland	Anthyllis vulneraria	Fabaceae	I, P	-0.12	1.69	Alpine	Astragalus alpinus	Fabaceae	F, P	0.18	4.053
	Centaurea jacea	Asteraceae	I, P	-0.10	74.76		Bartsia alpina	Scrophulariaceae	F, P	0.42	47.61
	Centaurea scabiosa	Asteraceae	I, P	NA	77.48		Campanula rotundifolia	Campanulaceae	F, P	-0.03	121.37
	Fragaria vesca	Rosaceae	F, P	0.01	58.49		Cerastium alpinum	Caryophyllaceae	F, P	0.02	42.74
	Galium boreale	Rubiaceae	F, P	NA	42.00		Dryas octopetala	Rosaceae	F, P	-0.04	59.67
	Galium mollugo	Rubiaceae	F, P	0.02	15.69		Erigeron uniflorus	Asteraceae	I, P	-0.01	139.79
	Geranium sylvaticum	Geraniaceae	F, P	0.21	4.28		Gentiana nivalis	Gentianaceae	F, P	0.02	172.91
	Geum rivale	Rosaceae	F, P	0.01	77.33		Geranium sylvaticum	Geraniaceae	F, P	0.17	4.92
	Knautia arvensis	Caprifoliaceae	I, P	-0.15	60.88		Leontodon autumnalis	Asteraceae	I, P	0.13	39.29
	Lathyrus linifolius	Fabaceae	F, P	0.12	9.36		Parnassia palustris	Celastraceae	F, P	-0.02	402.19
	Leucanthemum vulgare	Asteraceae	I, P	-0.12	155.13		Pinguicula vulgaris	Lentibulariaceae	F, P	0.07	112.35
	Linum catharticum	Linaceae	F, P	-0.12	9.73		Potentilla crantzii	Rosaceae	F, P	-0.13	27.40
	Lotus corniculatus	Fabaceae	F, P	0.10	29.69		Ranunculus acris	Ranunculaceae	F, P	0.09	23.46
	Pilosella lactucella	Asteraceae	I, P	0.20	42.58		Saussurea alpina	Asteraceae	I, P	-0.15	14.55
	Pilosella officinarum	Asteraceae	I, P	0.19	80.43		Saxifraga aizoides	Saxifragaceae	F, P	-0.18	144.79
	Pilosella pubescens	Asteraceae	I, P	-0.13	26.42		Silene acaulis	Caryophyllaceae	F, P	0.79	17.36
	Polygala vulgaris	Polygalaceae	F, P	0.30	2.00		Veronica alpina	Plantaginaceae	F, P	0.09	53.33
	Potentilla crantzii	Rosaceae	F, P	-0.21	37.60		Veronica fruticans	Plantaginaceae	F, P	-0.04	26.79
	Potentilla erecta	Rosaceae	F, P	-0.02	5.66
	Potentilla thuringiaca	Rosaceae	F, P	-0.15	39.71
	Prunella vulgaris	Lamiaceae	F, P	0.26	3.26
	Ranunculus acris	Ranunculaceae	F, P	-0.03	24.91
	Trifolium pratense	Fabaceae	I, P	-0.24	1.03
	Vicia cracca	Fabaceae	F, P	0.63	4.89