Oxalis cytisoides Zuccarini (1825: 178)

López, Alicia, Sassone, Agostina B. & Fiaschi, Pedro, 2018, Lectotypifications in Oxalis (Oxalidaceae) for the Flora of Argentina, Phytotaxa 343 (2), pp. 189-193 : 191-192

Oxalis cytisoides Zuccarini (1825: 178)

Type :— BRAZIL. Rio Janeiro, s.d., Martius s.n. (lectotype M-0172253! designated here, image available at http://plants.jstor.org/stable/ viewer/10.5555/al.ap.specimen.m0172253; isolectotypes: M-0172254!, MO-251371!) .

Note:—In the protologue the collector and the locality are mentioned, as “ Crescit in Brasiliae umbrosis prope Rio de Janeiro a clar. Eq. de Martius ibidem detecta . Floret Januario, Februario ”, but there is no reference to a particular specimen. Two specimens were found at M, where Joseph Zuccarini worked ( Stafleu & Cowan 1988), matching the original description: M-0172253 and M-0172254 (syntypes). The first one bears a single branch with fully developed infructescences and a small fragment, while the second one bears two branches with partially developed inflorescences. Additionally, a specimen at MO was located (MO-251371), surely a duplicate ex M. M-0172253 is in a better state of conservation, so it is selected here as the lectotype.

Oxalis darwinii Ball (1884: 214) [= Oxalis lasiopetala Zuccarini (1825: 149) ]

Type:— ARGENTINA. Buenos Aires. Bahía Blanca, 1884, Claraz 100 (lectotype K-000531759! designated here, image available at http://plants.jstor.org/stable/viewer/10.5555/al.ap.specimen.k000531759).

Note:—John Ball described the species mentioning three gatherings by Georges Claraz: No. 57, 58 and 100. These specimens are mounted on a single sheet stored at Kew. Following the synonymization of O. darwinii under O. lasiopetala (described as pink to purple flowered) in Lourteig (2000), we chose K-000531759 (i.e. “ Claraz 100 ”) (pale blue flowered) as lectotype of O. darwinii among the cited syntypes, because it is represented by three well-preserved individuals with fruits and flowers. Meanwhile, K-000531758 (i.e., “ Claraz 57 ”), is well-conserved but it is described in the protologue with yellow flowers (probably a different taxa), and K-000531757 (“ Claraz 58 ”) is described as violet flowered but it is not well-preserved.

Oxalis geminata Gillies ex Hooker & Arnott (1833: 163) [= Oxalis squamata Zuccarini (1825: 157) ]

Type :—[ ARGENTINA] Andes of Chile , Villavicenzio, Cuming 172 (lectotype K, first-step designated by Lourteig (2000: 455)]; second-step K 000531764 ! designated here, image available at http://plants.jstor.org/stable/viewer/10.5555/al.ap.specimen.k000531764, isolectotypes: E-322340!, BR-05280223!, FI-006240!, K-000531763!) .

Note:—In the protologue of O. geminata, Hooker & Arnott (1833) mentioned “Andes of Chili, Cuming ( N. 172) Villavicenzio, (5000 feet,)” and “El Cerro de San Pedro Nolasco, Andes of Mendoza and Chili, Dr. Gillies ”. Lourteig (2000) made an inadvertent lectotypification by choosing the Cuming’s specimen at K, but made a mistake in the collection number (“ Cuming 127 ” instead of “ Cuming 172 ”). Between the two specimens of “ Cuming 172 ” housed at K, we select K-000531764 (including two individuals) as second-step lectotype.

Oxalis leptocaulos Philippi (1893: 902) [= Oxalis hypsophila Philippi (1893: 903) ]

Type:— CHILE. Región de Atacama. Pedernales, 3600 m, 1884, San Roman s.n. (lectotype SGO, first-step designated by Lourteig [2000: 466]; second-step SGO- 000000325! designated here, image available at http://plants.jstor.org/stable/viewer/10.5555/al.ap.specimen. sgo000000325; isolectotype: SGO-000000326!) .

Note:— Lourteig (2000: 466) made an inadvertent lectotypification but only mentioned “ Holotype and Isotype stored at SGO ”. We propose a second-step lectotypification and choose SGO-000000325 as lectotype. This specimen is in perfect state of preservation, and perfectly fits the original description.

From the study of the type specimens, abundant herbarium material and recognition of the species in the field, it has been found that O. leptocaulos is undistinguishable from O. hypsophila .