Pollinator-mediated selection might lead to among-trait differences in the degree and pattern of floral integration and intra-flower variation. To examine the patterns of intra-flower variation in floral traits, including nectar volume, we performed a field study using the zygomorphic flowers of Aconitum japonicum ssp. subcuneatum. We investigated (1) correlations between the sizes of the left and right sepals and petals, (2) variation in floral traits among plants, within plants and within flowers, (3) effects of sexual phases on floral integration variation in floral and nectar traits, and (4) the effect of size and intra-flower variation in traits of the left and right sepals and petals on pollen removal by pollinators. Lateral sepal area, but not lower sepal area, was highly correlated between the left and right sepals. Floral traits were more integrated during the male phase than during the female phase. Nectar standing crop in male-phase flowers correlated with helmet height and lateral and lower sepal area, but in female-phase flowers it only correlated with spur length. While intra-flower variance in lateral sepal area accounted for approximately 10% of the overall variance in these traits, the variance in lower sepal area accounted for 70% of the overall variance. Lateral sepal area had a negative effect on the number of pollen grains remaining after pollinator visits. Low variance in lateral sepals within flowers and measurements of pollen removal suggest that lateral sepals play a more important role in pollen export than the other traits. Left and right sepals may be the targets of selection for symmetry in zygomorphic flowers.

授粉媒介介导的选择可能导致花整合度和花内变异程度和模式的性状差异。为了检查花内性状的花内变异模式，包括花蜜量，我们使用日本乌头的合子花进行了田间研究。楔形亚目。我们调查了（1）左右萼片和花瓣的大小之间的相关性，（2）植物之间，植物内和花朵内花卉性状的变异，（3）性相对花卉和花蜜性状的花卉整合变异的影响（4）左右萼片和花瓣性状的大小和花朵内变化对授粉媒介去除花粉的影响。左侧萼片和右侧萼片之间的外侧萼片面积（而不是较低的萼片面积）高度相关。雄性阶段的花性状比雌性阶段的花性状更完整。雄性相花的花蜜常熟作物与头盔高度，侧面和下部的萼片面积相关，而雌相相花的花蜜仅与骨刺长度相关。虽然外侧萼片区域的花内变异约占这些性状总体变异的10％，而下部萼片区域的变异约占总体变异的70％。萼片外侧面积对传粉者访视后残留的花粉粒数量有负面影响。花中侧生萼片的低变异性和花粉去除率的测量表明，与其他性状相比，侧生萼片在花粉输出中起着更重要的作用。左萼片和右萼片可能是选择对称形花的目标。花中侧生萼片的低变异性和花粉去除率的测量表明，与其他性状相比，侧生萼片在花粉输出中起着更重要的作用。左萼片和右萼片可能是选择对称形花的目标。花中侧生萼片的低变异性和花粉去除率的测量表明，与其他性状相比，侧生萼片在花粉输出中起着更重要的作用。左萼片和右萼片可能是选择对称形花的目标。