Opuntia repens subsp. taylorii Guiggi & Mariotti 2022, comb. et stat. nov.

• Main Authors: Guiggi, Alessandro, Mariotti, Mauro
• Format: Other/Unknown Material
• Language: unknown
• Published: 2022
• Subjects: Biodiversity; Taxonomy; Plantae; Tracheophyta; Magnoliopsida; Caryophyllales; Cactaceae; Opuntia; Opuntia repens; Opuntia repens bello (1881: 277) subsp. taylorii (britton & rose) guiggi; Bello; Nash; Terre-Neuve
• Online Access: https://zenodo.org/record/7362403; https://doi.org/10.5281/zenodo.7362403

3. Opuntia repens Bello (1881: 277) subsp. taylorii (Britton & Rose) Guiggi, comb. et stat. nov. ≡ Opuntia taylorii Britton & Rose (1908: 520, as “ Opuntia taylori ”). Type: ― HAITI. Between Gonaives and La Hotte Rochée: on road to Terre Neuve, 12 August 1905, Nash 1587 (holotype NY386061, non videmus; isotype US 00117058!, corpus, areolae, spinae). = Opuntia hattoniana Britton & Rose (1914: 97). Lectotype (designated here): ― DOMINICAN REPUBLIC. Azua, March 1913, Rose 3835 [US00180245! (two sheets), corpus, areolae, spinae; isolectotypes: NY1496093! (sub Opuntia taylori), corpus, areolae, spinae, HMGBH!, corpus, areolae, spinae (Fig. 6)]. Etymology: ―Dedicated to the British botanist, explorer and co-collector Norman Taylor (1883–1967) (Crook & Mottram 2004, Eggli & Newton 2004). Tyfication of Opuntia hattoniana: ―No type or herbarium were cited by Britton & Rose (1914: 97) in the protologue. The species was later synonymized by the same authors under Opuntia taylori (see Britton & Rose 1919: 103). Guiggi & Mariotti (2019: 194) traced three type collections with the same number and date deposited at NY, US and HMGBH, but being the type necessarily a single specimen conserved in one herbarium (see Art. 8.1 of ICN), a lectotype is designated here (herbarium US) because includes larger and easier identifiable specimens; isolectotypes at NY and HMGBH. Taxonomical notes: ―We here propose to consider the taxon taylorii at subspecies rank of Opuntia repens. In fact, the ecology of Britton & Rose’s Opuntia taylorii is different from Bello’s O. repens [desert on calcareous rocks vs. saline soils (see Majure & Clase 2020: 107)]; the distribution areas are: region of Hispaniola for O. taylorii (Britton & Rose 1919: 103) and, concerning O. repens, Puerto Rico (including Mona Island), Virgin Islands and in northern part of Dominican Republic (Majure & Clase 2020: 107) and in Haiti, recognised here for the first time (see Majure & Clase 2020: 107), vicinity of Fond Parisien ...