4.3. Boerhavia coulteri (Hooker) Watson (1889: 70) ≡ Senkenbergia coulteri Hooker (in Bentham & Hooker 1880: 6). Neotype (designated here):― MEXICO, Sonora Alta (r?), Coulter 1425 (K000572646 [image!] image available at http://specimens.kew. org/herbarium/ K000572646). Typification of the name Senkenbergia coulteri:― The protologue of S. coulteri (Bentham & Hooker 1880: 5–6) consists in a short description of the anthocarp (“anthocarpio clavado truncato”) and a description of the section where S. coulteri belongs; no specimen or locality were mentioned (note, however, that “ Mexico ” was reported the whole genus Senkenbergia and “Mexici borealis incolae” for the four species he recognized). Watson (1889: 70) mentioned a specimen collected by Coulter in Mexico (no. 1425) and we found this specimen at K (barcode K000572646). K000572646 is probably part of the original material examined by Hooker to describe and name S. coulteri, but there is no way to be sure about this, since no collection date is indicated and in the protologue Hooker (in Bentham & Hooker 1880: 6) did not mention a locality, a collector or collection number. No specimen which can be useful for the lectotypification purpose was traced by us. As a consequence, a neotypificaiton is required (Art. 9.8 of ICN) and the Coulter’s specimen cited by Watson (1889: 70) is here designated as neotype (Fig. 3). Distribution in Mexico: ―This species has been reported from Baja California, Baja California Sur, Chihuahua, Nayarit, Sinaloa and Sonora (Villaseñor 2016). In Sonora it is distributed in Chihuahua Desert, Pacific Lowlands and Sonora biogeographic provinces (Fig. 4B), and has been collected in Agua Prieta, Benjamín Hill, Cucurpe, Guaymas, Hermosillo, Imuris, Moctezuma, Nacozari de García, Onavas, Puerto Peñasco, Soyopa and Yécora municipalities, including insular territory (Isla Tiburón), in xerophytic scrub and rode sides, at 10–1500 m a.s.l.

Published as part of Sandoval-Ortega, Manuel Higinio & Sánchez-Escalante, José Jesús, 2022, The family Nyctaginaceae (Caryophyllales) in Sonora, Mexico, pp. 35-56 in Phytotaxa 575 (1) on pages 41-43, DOI: 10.11646/phytotaxa.575.1.2, http://zenodo.org/record/7403226