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Table 3 Pollen tube growth after hand pollination treatments in Psychotria cephalophora

From: Distyly and floral morphology of Psychotria cephalophora (Rubiaceae) on the oceanic Lanyu (Orchid) Island, Taiwan

    Status of pollen tube growth Percentages of the pollen tube reached the base of styles
Experiments n‡ N‡
Intermorphic pollination       
 S → L cross† 50 7 50 0 0 100%
 L → S cross† 51 8 51 0 0 100%
Intramorphic pollination       
 SS cross† 30 8 0 0 30 0%
 LL cross† 60 13 3 8 49 5.0%
Self pollination       
 S† 77 14 0 2 75 0%
 L† 61 15 2 4 45 3.3%
  1. †S: Short-styled morph; L: Long-styled morph.
  2. ‡n: Number of flowers examined; N: Number of individuals examined.
  3. §A: More than five pollen tubes reached at the base of the style.
  4.   B: 1 - 10 pollen tubes reached at one third of the style.
  5.   C: No pollen tube penetrate into the stigma.