Abutilon bidentatum (Hochst.) A.Rich., Tent. Fl. Abyss.

Verloove, Filip & Galasso, Gabriele, 2020, Short Communication A note on the author citation and type of Sida bidentata (Abutilon bidentatum; Malvaceae), Natural History Sciences 7 (2), pp. 87-88 : 87

Abutilon bidentatum (Hochst.) A.Rich., Tent. Fl. Abyss. 1(1): 68. 1847 [22 May 1847].

Basionym: Sida bidentata Hochst., Schimperi Iter Abyssinicum 2: 1003. 1842.

Type (lectotype, designated by Naqshi et al., 1988: 1519): [ Ethiopia], prope Aguar, 8 Apr. 1839, G. H. W. Schimper #1003 ( Schimperi iter Abyssinicum , sectio secunda) ( K barcode K 000240390 [digital image!, available at http://www.kew.org/herbcatimg/115300. jpg]. Isolectotypes: BR ( BR 0000008403513! and BR 0000006247638!), FI ( FI 000438 [digital image!]), MO (MO-309064 [digital image!]), NYBG ( NY 00188236 [digital image!]), P ( MNHN-PP 00389241 [digital image!] and MNHN-P-P00389242 [digital image!]), W ( W 0009344 [digital image!] and W-Rchb. 1889-0313032 [digital image!]), and doubtlessly other herbaria as well [herbarium acronyms follow Thiers, 2020 onwards].

Nomenclature note: Hochstetter, when publishing the new name Sida bidentata , referred to a single collection, namely that of Georg Heinrich Wilhelm Schimper (1804-1878) n. 1003, collected on the occasion of Schimper’s Iter Abyssinicum (sectio secunda): prope Aguar [ Abyssinia: Ethiopia], 8 Apr. 1839. This exsiccatum was distributed to numerous herbaria; all duplicates of this sample are syntypes, from which a lectotype can be selected (Art. 40.2 and Note 1 of the ICN and related examples). According to Fryxell (2002) the name S. bidentata was typified twice, first by Abedin (1979) sub- sequently by Naqshi et al. (1988), the former seemingly having priority. Abedin (1979) typified S. bidentata on a specimen (as “ isotype ”) cited by Richard (1847) in his Tentamen florae Abyssinicae and collected by Quartin Dillon and Antoine Petit s.n. (P-herb. Richard). However, as shown above, the original validating description of the name S. bidentata was by Hochstetter and based on a single collection, that of Schimper. Thus, the specimen selected by Abedin (1979) is not original material of S. bidentata , and his typification is superseded by the lectotypification by Naqshi et al. (1988) (Art. 9.19(a) of the ICN).