Acanthocereus fosterianus (Cutak) Lodé (2013: 2)

Korotkova, Nadja, Borsch, Thomas & Arias, Salvador, 2017, A phylogenetic framework for the Hylocereeae (Cactaceae) and implications for the circumscription of the genera, Phytotaxa 327 (1), pp. 1-46 : 18

1.5 Acanthocereus fosterianus (Cutak) Lodé (2013: 2) ≡ Peniocereus fosterianus Cutak (1946: 19) .

Type:— MEXICO. Guerrero: Tierra Colorada, 1500 ft, 1935, Foster s.n. (holotype MO-054010!).

= Peniocereus fosterianus var. nizandensis Sánchez-Mejorada (1974: 49)

Lectotype (designated here):—[illustration] fig. 27 “Flor de Peniocereus fosterianus var. nizandensis ” in Sánchez-Mejorada (1974).

= Peniocereus fosterianus var. multitepalum Sánchez-Mejorada (1974: 50) .

Lectotype (designated here):—[illustration] fig. 28 “Flor de Peniocereus fosterianus var. multitepalum ” in Sánchez-Mejorada (1974).

Notes: ― Peniocereus fosterianus var. nizandensis was based on a specimen collected by Thomas MacDougall (A-56, Mexico, Oaxaca, Nizanda), and dispatched to Hernando Sánchez-Mejorada (72-4066) who described it and deposited the specimen in MEXU. At present there is no herbarium specimen in MEXU (missing), nor in NY and US where MacDougall also deposited cacti samples. We therefore designate a lectotype (Art. 9.2), based on the unique drawing that accompanies the protologue and associated with this taxon.

As in the previous case, Peniocereus fosterianus var. multitepalum was associated with a specimen collected by T. MacDougall (A-56, Mexico, Oaxaca, San Pedro) and refers to H. Sánchez-Mejorada (72-4067). The protologue clearly states that it was deposited in MEXU, however the specimen was not found in that herbarium (missing), nor in NY and US. Consequently, we designate as lectotype the only illustration that accompanies the publication (Art. 9.2).