Autor: Britton & Rose

Genus honouring Francis Ernest Lloyd, an American botanist (1868-1947) who contributed to the work of Britton & Rose, and “neo”, because the genus Lloydia had already been used to designate a Liliaceae.
A genus of small low plants, caespitose, globular to cylindrical, with the epidermis yellowish-green or greyish-green and the apex woolly. Ribs virtually absent, tubercles well defined, conical, furrowed. Areoles divided in two parts, joined by a groove. Central spines straight, usually one or two, sometimes absent.
Flowers diurnal, self-sterile, funnel-shaped, appearing at the base of the areolar groove of young tubercles, magenta red or lilac, with a naked pericarpel, pollinated by insects. Fruits rather small, globose, greenish, naked, fleshy at the beginning, becoming dry when ripe, indehiscent. Seeds subglobose, tuberculate, matt, black.
The genus Neolloydia grows between Mexico and the United States, in small scattered populations in a wide geographic range, in the shade or in full sun, on hillsides, terraces and limestone gravel, more rarely in gypsum, among xerophyllous shrubs, in grasses and moss, between 400 m and 2200 m in altitude.
Mexico (Aguascalientes, Chihuahua, Coahuila, Durango, Guanajuato, Hidalgo, Nuevo Leon, Queretaro, San Luis Potosi, Tamaulipas, Zacatecas), USA (Texas).

Currently 3 species provisionally recognised:
– Neolloydia conoidea* (DC.) Britton & Rose 1923
– Neolloydia inexpectata D.Donati 2012
– Neolloydia matehualensis* Backeberg 1948

References: "TAXONOMY of the CACTACEAE" -  ISBN 978-84-617-3692-8 (Vol. 2)