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Dyckia argentea is a synonym of:

Hechtia argentea (B.S.Williams) Baker

Publ: Biol. C. Am. 3: 317 (1884)

Type: Lectotype (designated by Smith & Downs in Fl. Neotrop. Monogr. 14(1): 596. 1974): MEXICO, Anon. s.n. (K barcode K000307706, photo GH); Epitype (designated here): Mexico, Hidalgo, Municipio Zimapán, Cañón del Río Tolimán, matorral xerófilo en rocas verticales a lo largo del río, 20o48′06.5′′N 99o26′38.2′′W, 1192 m, 3 Apr. 2019, C.T. Hornung-Leoni 1735♂ (CICY No. 71881; isoepitypes: HGOM, K, MEXU).

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Distribution: MEXICO: Hidalgo, Queretaro

Habitat: in xerophytic shrub-lands and at margins of low caducifolious forests, always onsteep rock walls, 800-1600 m. Elev.

Phenology: Hechtia argenteaflowers from April to June,although under cultivation the flowering period can begin aslate as November (male plants) when the peduncle and com-pacted branches develop, extending into December when themajority of flowers open. Older rosettes can produce up to fourinflorescences simultaneously; male rosettes have a longerflowering period than female ones, as previously reported forHechtia schottiiBaker (Ramírez-Morillo & al., 2008), anotherspecies belonging to the same clade asHechtia glomerata(Ramírez-Morillo & al., 2018a).

Hechtia argentea