Rubus flagellaris Willd., 1809

Van de Beek, Abraham & Widrlechner, Mark P., 2021, North American species of Rubus L. (Rosaceae) described from European botanical gardens (1789 - 1823), Adansonia (3) 43 (8), pp. 1789-1823 : 83

Rubus flagellaris Willd.

In Enumeratio Plantarum: 549 ( Willdenow 1809).

LECTOYPE (designated by Bailey 1923: 159). — B [ BW09893010 ].

FINDINGS

A specimen of Willdenow’s is in herbarium B. Bailey (1943: 247 f) extensively dealt with it and selected it as a type. Because it is not certain that it is the only specimen that Willdenow used, it must be treated as a lectotype ( BW09893010 ) .

The type is a good collection, and it is without doubt what is presently conceived under this name, after Bailey’s conclusions (1923: 234; earlier, 1898: 368, he was uncertain about its identity). It is also clear that it is not identical with R. serratus J.F. Gmel. (homotypic synonym of R. villosus Aiton ), which is much more densely pubescent and bears stipitate glands.

It is important to note that if the Procumbentes are considered as one species, as Alice et al. (2014) essentially did in their synonymy for R. flagellaris , the correct name of that species becomes R. serratus J.F. Gmel. , since its publication predated that of R. flagellaris by 19 years.