Veronica spicata subsp. crassifolia, (Nyman) Hayek

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1972, Flora Europaea. Volume 3. Diapensiacea to Myoporaceae, Cambridge: Cambridge University Press : 251

(e) Subsp. crassifolia (Nyman) Hayek , Prodr. FI. Penins. Balcan. 2: 157 (1929):

Like subsp. (d) but stem often glabrous except in inflorescence; leaves glabrous, the lower with petiole up to 20 mm; calyx ciliate but otherwise glabrous; corolla bright blue with ovate-lanceolate, flat lobes. • 5. Carpathians and mountains o f N. part o f Balkan peninsula. V. urumovii Velen. , Österr. Bot. Zeitschr. 51: 31 (1901), from Bulgaria, is eglandular, with ovate-elliptical, setulose leaves, and calyx ciliate but otherwise glabrous. It seems to be most closely related to subsp. (e) but requires further investigation.