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Table 2 Pollen size and stainability of Psychotria cephalophora

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

  Short-styled morph Long-styled morph Mann Whitney’s
  N† Mean ± S. D. N† Mean ± S. D. Utest
Pollen size (μm)§      
Equatral 10 54.7 ± 2.5 10 44.2 ± 2.4 p < 0.001
polar 10 50.5 ± 2.7 10 41.1 ± 2.5 p < 0.001
E/P 10 1.08 ± 0.03 10 1.08 ± 0.02 ns‡
Pollen stainability (%)¶ 10 93.1 ± 13.4 10 95.9 ± 2.6 ns‡
  1. †N: Number of individuals examined.
  2. §: 30 pollen grains from single flowers on each individual were measured.
  3. ¶: 200 pollen grains from single flowers on each individual were examined.
  4. ‡ns: Not significantly differnet between two floral morphs (p > 0.05).