Pollination Biology of Lapeirousia subgenus Lapeirousia (Iridaceae) in southern Africa; floral divergence and adaptation for long-tongued fly-pollination Abstract | Materials and Methods | Results | Discussion | Literature Table 4. Nectar concentration and volume in subgenus Lapeirousia. Taxa of subgenus Lapeirousia are grouped according to flower type and pollinator class as in Table 2. Figures for nectar sugar concentration are means, standard deviation given in parentheses, but ranges are provided for less than three observations. Species Sample size Nectar conc. (%) Nectar volume ml L. silenoides group L. dolomitica subsp. dolomitica 5 30.4(2.4) 1.4-3.1 subsp. lewisiana 4 27.0(0.8) 5.1.5.5 L. jacquinii 5 27.3(2.9) 1.5-2.3 1 25 1.5 L. oreogena 10 25.8(1.6) 2.5-7.3 L. pyramidalis subsp. regalis 10 28.4(2.8) 2.6-4.8 3 28.2(0.8) 2.6-4.8 L. silenoides 10 26.5(1.1) 1.7-2.8 3 29.0(2.0) 2.3-3.6 2 22-25 2.6-2.8 1 26 2.1 L. violacea 3 25.0(0) 1.5-1.6 7 28.2(2.9) 1.4-1.8 L. divaricata group L. barklyi 2 26-27.5 0.9-1.3 L. divaricata 7 26.7(1.5) 0.6 L. exilis 10 34.1(1.8) 0.9-1.7 L. montana 10 24.8(2.2) 2.6-8.1 L. plicata 3 28.3(3.2) 0.9-1.7 L. pyramidalis subsp. pyramidalis 3 30.1(4.9) 0.7-1.7 7 34.1(1.6) 0.8-3.0 L. spinosa 2 31-32 1.1-1.2 L. tenuis 6 46.1(5.1) 0.4-1.0 L. fabricii group L. anceps 10 23.5(1.3) 1.5-3.1 7 21.1(1.4) 1.4-3.2 L. arenicola 4 32.8(2.1) 0.6-0.7 L. fabricii 10 32.5(2.3) 1.3-3.4 5 24.8(2.6) 0.8-1.5 7 25.2(1.1) 0.4-0.9 L. macrospatha 10 23.8(1.5) 0.7-3.3 3 21.0(1.0) 3.5-5.7 L. simulans 4 25.8(1.7) 0.8-1.5 L. verecunda 10 26.6(2.5) 0.6-3.0 TOP