Phyteuma globulariifolium subsp. globulariifolium

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1976, Flora Europaea. Volume 4. Plantaginaceae to Compositae (and Rubiaceae), Cambridge University Press : 98

(a) Subsp. globulariifolium :

Stem 1-5 cm; leaves obtuse, often crenate towards the apex. Outer bracts suborbicular, often wider than long, obtuse. 2л = 28. E. Alps, westwards to c. 10° 30' E.