1. Editorial

   • Hans F. Linskens
   • Joseph P. Mascarenhas

   EditorialNotes Pages: i - i

2. Comparison of S-alleles and S-glycoproteins between two wild populations of Brassica campestris in Turkey and Japan

   • Sup Nou III
   • Masao Watanabe
   • Kokichi Hinata

   Original Articles Pages: 79 - 86

3. An anatomical study of ovary-to-cuke development in consistently low-producing trees of the ‘Fuerte’ avocado (Persea americana Mill.) with special reference to seed abortion

   • E. M. A. Steyn
   • P. J. Robbertse
   • D. Smith

   Original Articles Pages: 87 - 97

4. Megaspore development in Selaginella. I. “Wicks”, their presence, ultrastructure, and presumed function

   • M. A. Morbelli
   • J. R. Rowley

   Original Articles Pages: 98 - 107

5. Chemical agents that inhibit pollen development: effects of the phenyl-cinnoline carboxylates SC-1058 and SC-1271 on the ultrastructure of developing wheat anthers (Triticum aestivum L. var Yecora rojò)

   • P. J. Schulz
   • J. W. Cross
   • E. Almeida

   Original Articles Pages: 108 - 212

6. Effects of varying pollen load on fruit set, seed set and seedling performance in apple and pear

   • J. Janse
   • J. J. Verhaegh

   Original Articles Pages: 122 - 126

7. Microtubular configurations during the cellularization of coenocytic endosperm in Ranunculus sceleratus L.

   • Xu XuHan
   • André A. M. van Lammeren

   Original Articles Pages: 127 - 132

8. Development of a method for the identification of S alleles in Brassica oleracea based on digestion of PCR-amplified DNA with restriction endonucleases

   • J. Brace
   • D. J. Ockendon
   • G. J. King

   Original Articles Pages: 133 - 138

9. Effect of ovular receptivity on seed set and fruit development in cucumber (Cucumis sativus L.)

   • E. Le Deunff
   • A. Sauton
   • C. Dumas

   Original Articles Pages: 139 - 146