Wahlenbergia Schrad. ex Roth.
Engl.: wahlenbergia.

Wahlenbergia pumilio:

Wahlenbergia pumilio (Port. ex Schult.) A.DC., Campanulaceae: See Edraianthus pumilio A. DC.

Wahlenbergia serpyllifolia:

Wahlenbergia serpyllifolia (Vis.) Vatke, Campanulaceae: See Edraianthus serpyllifolius (Vis.) A.DC.

I have no articles for this botanical term, but there might be some for the next level down (if found).