10.1. Pisonia capitata (Watson) Standley (1911: 388)

≡ Cryptocarpus capitatus Watson (1889: 71) .

Lectotype (here designated):― MEXICO, Sonora, near Gauymas, 1887, Palmer 647 (GH 00037424 [image!] image available at https:// s3.amazonaws.com/huhwebimages/279428907 CB24 B1 / type /full/37424.jpg; isolectotype K000572758 [image!] image available at http://specimens.kew.org/herbarium/ K 000572758) .

Typification of the name Cryptocarpus capitatus:― The protologue of C. capitatus (Watson 1889: 71) consists of a description, a locality (“Near Guaymas”), and a number (“647”); Watson (1889: 71) also mentioned samples collected in different months: “a single head of flowers was collected in August” and “the January specimens show an abundance of imperfectly developed flowers”. These information suggests that he used more than one specimen when preparing the treatment of the new taxon. However, no specific sheet is indicated and we traced two specimens of C. capitatus collected by Palmer (no. 647) deposited at GH (barcode GH00037424) and K (barcode K000572758, this probably fragments derived from the GH specimen). These two specimens correspond to sintypes according to Art. 9.6 ICN. GH00037424 is here designated as lectotype since it is the most complete specimen, matches Watson’s protologue, and corresponds to the currect concept in Pisonia (see e.g., Spellenberg 2003).

Distribution in Mexico: ―Northwest Mexico (Spellenberg 2003). In Sonora it is distributed in Pacific Lowlands and Sonoran biogeographic provinces (Fig. 4A), in Álamos, Guaymas, Huatabampo, Mazatán, Navojoa, San Javier, Tepache, Ures and Yécora municipalities, in tropical deciduous forest and subtropical scrub, at 5–600 m a.s.l.