Dionysia

Alipour, S., Mehregan, I. & Lidén, M., 2021, DIONYSIA SPLENDENS (PRIMULACEAE), A NEW SPECIES FROM THE FARS PROVINCE OF IRAN, Edinburgh Journal of Botany 78 (397), pp. 1-5 : 4

Key to species of DIONYSIa in the Zagros mountains

All species detailed in the key, except Dionysia viva and D. splendens (both currently incertae sedis) belong in sect. Dionysopsis (Pax) Melchior. Section Dionysia (see couplets 3 and 7) is not detailed. Species described since Lidén’s synopsis (2007) are in bold.

1a. Flowers violet, pink or bluish purple ________________________________________________ 2

1b. Flowers yellow ____________________________________________________________________ 7

2a. Inflorescence long-stalked, several-flowered; bracts large, dentate ______ D. splendens

2b. Flowers sessile, single or paired; bracts linear ______________________________________ 3

3a. Leaf margin distinctly revolute _____________________________________________________ 4

3b. Leaves flat or slightly involute _______________________________________ (sect. Dionysia )

4a. Corolla pubescent; cushions very compact, completely covered in hairs _____________ 5

4b. Corolla glabrous; indumentum sparse to moderately dense _________________________ 6