Lithospermum obtusum Visiani (1836a: 194

Clementi, Moreno, D’Antraccoli, Marco & Miola, Antonella, 2019, Nomenclatural and taxonomical notes on some taxa described by Roberto de Visiani from Egypt and Sudan, Phytotaxa 399 (1), pp. 49-64 : 51

Lithospermum obtusum Visiani (1836a: 194 ; also treated in Visiani 1836b: 10; 1836c: 65)

Locus classicus: —“in AEgypto”.

Lectotype (designated here):— EGYPT. s.l., [1824–1826], Brocchi s.n. (PI005426!) (see Fig. 2 ).

Note:—The specimen selected as type bears a label in the handwriting of Visiani, reading “In Aegypto Brocchi”, and is the only specimen that we were able to locate. According to Cecchi (pers. comm.), the description and type fit within the diversity of Alkanna tinctoria Tausch (1824: 234) s.l., a name wrongly (Cecchi, pers. comm.) considered illegitimate by Boulos (2000).

Convolvulus lasiospermus Visiani (1836a: 197 ; also treated in Visiani 1836b: 13; 1836c: 66)

≡ Ipomoea rumicifolia Choisy (1833: 447)

Locus classicus: —“circa Chartum in Sennaar”.

Lectotype (designated here):—Illustration in Visiani 1836a: tab. 1 fig. 2.

Epitype (designated here):— SUDAN. Senaar, [1824–1826] Brocchi s.n. (G-DC000951!) (see Fig. 3 ).

Note:—The illustration in Visiani (1836a) is the only remaining original material, and is therefore our only choice for a lectotype. Since it does not show many of the most important diagnostic features in its family (particularly the gynoecium), we support our designation with the choice of an epitype. We conservatively select a specimen that may well have been seen by Visiani, and that is at least a duplicate of his original material, having been collected by Brocchi. It is compatible with the protologue ( Visiani 1836a), and was recognised by Staples (in sched.) as a syntype of Ipomoea rumicifolia Choisy (1833: 447) , thus making C. lasiospermus a later, illegitimate homotypic synonym.

Figures

FIGURE 2. Lectotype of Lithospermum obtusum Vis.: Brocchi s.n. (PI005426).

FIGURE 3. Epitype of Convolvulus lasiospermus Vis.: Brocchi s.n. (G-DC000951, left specimen on sheet).