| If the species investigated are heterostylous, one should try to study pollen of all forms. |
| Floral odor variation in two heterostylous species of Primula. |
| Nivenia stokoei have pale to deep blue flowers, but the flowers are not heterostylous. |
| Pentanisia appears to exhibit dimorphisms typically associated with heterostylous plants. |
| Both F. jinshaense and F. gilesii are self-incompatible with heterostylous flowers and are diploid. |
| In addition, unlike most heterostylous species, the two floral morphs in Narcissus spp. do not differ in pollen size or pollen production. |
