Primula
species - Harvard Herbaria - Extensive key
to species of Primula. Each key leads to a fairly detailed
botanical description of each species of Primula including
its range and habitat. Includes notes on varities and sub-species.
Primula
Sections - American Primrose Society - Good descriptions
of each Primula section and its main characteristics with
a note of the species in each section (and seed cultivation
notes)
Primula
species photographs - Good quality photographs from the
University Durham Botanic Gardens of a number of Primula species
