Trifolium pachycalyx Zohary

Raab-Straube, Eckhard von & Raus, Thomas, 2022, Euro + Med-Checklist Notulae, 15, Willdenowia 52 (2), pp. 273-299 : 284

Trifolium pachycalyx Zohary (corrigendum) – Fig. 6.

In the previous instalment of the Euro+Med-Checklist Notulae, we published Trifolium pachycalyx as a new country record for Greece ( Bergmeier & al. 2021). While the record and the two locations given on the North Aegean island of Limnos were correct, the accompanying photo taken in the field did not show T. pachycalyx but T. glomeratum L. The two species are superficially similar, especially in their small, sessile inflorescences, and they co-occur in both localities. The inflorescences of T. glomeratum are globular, with numerous densely packed flowers, glabrous calyces and pale-pinkish corollas. The inflorescences of T. pachycalyx are rather loose, consisting of 6–12(–15) flowers with sparsely pilose calyces and whitish corollas. While the corollas of T. glomeratum are usually 5–6 mm long and exserted from the calyx, those of T. pachycalyx are much smaller and do not exceed the calyx teeth. Trifolium pachycalyx is morphologically similar to T. suffocatum L., but the latter is acaulescent. With this corrigendum we supply photos taken from our herbarium specimens of T. pachycalyx from Limnos ( Fig. 6), which show the general habit and details of inflorescences, especially the short, whitish corollas and the sparsely pilose calyces, which become somewhat gibbous in the fruiting stage and have broadly membranaceous, narrowly lanceolate teeth (vs broadly lanceolate-acuminate teeth in T. glomeratum ). We confirm the occurrence of the species in Limnos, Greece.

E. Bergmeier, J. Krause & M. Ristow