Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Ericales
Family: Primulaceae
Genus: Primula

Primula is a genus of mainly herbaceous flowering plants containing about 500 species. They include the familiar wildflower of banks and verges, the primrose (P. vulgaris). Other common species are P. auricula (auricula), P. veris (cowslip) and P. elatior (oxlip). These species and many others are valued for their ornamental flowers. They have been extensively cultivated and hybridised for many hundreds of years. Primulas are native to the temperate northern hemisphere, south into tropical mountains in Ethiopia, Indonesia and New Guinea, and in temperate southern South America. Almost half of the known species are from the Himalayas.

http://www.primulaworld.com/PWweb/photogallery.htm has a gallery of over 3000 images of Primulas 

Primula vulgaris
1-Primula vulgaris-003.JPG

A primula cultivar that is a garden escapee.
Primula species 1 .JPG

Primula species 4 .JPG

The seedpod is the ball inside the calyx. The unripe pod is pale green, and the unripe seeds are green and soft. Ripe seeds are black or brown and hard.
Primula species 3 .JPG

The leaves.
Primula species 2 .JPG

Thanks to Wikipedia for text and information: https://creativecommons.org/licenses/by-sa/3.0/