Flower Constancy in the Generalist Pollinator Ceratina flavipes (Hymenoptera: Apidae): An Evaluation by Pollen Analysis

Table 3

Weight (mg) of desiccated pollen per flower head on each day after the initiation of flowering (see Figure 2(a) for each species). Mean $\pm$ standard deviation of five flower heads. Average pollen production (P) was used to calculate pollen availability within a 50 $\times$ 100 m quadrat (cf. Table 4). Names of flowering species are arranged in descending order average pollen production.

Flowering sp.	Days from the initiation of flowering							Average pollen productin ($P$)
	1	2	3	4	5	6	7
Vicia cracca	$33.26\pm 41.9$	$34.30\pm 18.61$	$22.83\pm 9.11$	$33.50\pm 47.46$	$19.34\pm 30.77$	$13.55\pm 3.64$	—	$26.13\pm 8.80$
Rosa rugosa	$26.96\pm 22.14$	$13.48\pm 14.98$	$9.38\pm 4.03$	$4.22\pm 3.54$	$2.53\pm 0.92$	—	—	$11.31\pm 9.76$
Rosa parvifolius	$12.60\pm 8.59$	$15.48\pm 13.56$	$9.25\pm 32.51$	$7.72\pm 3.29$	—	—		$11.26\pm 3.47$
Melilotus suaveolens	$1.99\pm 1.42$	$3.05\pm 1.24$	$10.00\pm 1.65$	$13.04\pm 4.13$	$18.22\pm 8.33$	$9.05\pm 1.92$	$3.42\pm 16.58$	$6.76\pm 4.54$
Picris hieracioides	$8.15\pm 1.87$	$4.58\pm 2.13$	$2.95\pm 1.49$	$2.64\pm 1.81$	—	—	—	$4.44\pm 2.20$
Lathyrus japonicus	$0$	$11.84\pm 30.67$	0	0				$2.96\pm 0.00$
Oenothera biennis	$0.58\pm 0.24$	$1.97\pm 1.68$	$0.93\pm 0.54$	—	—	—	—	$1.15\pm 1.16$
Calystegia soldanella	$4.41\pm 0.95$	$0.45\pm 0.30$	—	—	—	—	—	$0.93\pm 0.84$