Sayulensis   ‘사율렌시스’ Walther

Parentage / Parenté : E. secunda x E. gibbiflora /  E. 세쿤다 x E. 기비플로라

Supposedly a spontaneous hybrid in cultivation.

Description by E. Walther  from cultivated material originating from Sayula, Jalisco (Echeveria, p. 151-152, 1972) :

Glabrous plant.

Stem short, freely soboliferous.

Rosettes to over 25 cm in diameter.

Leaves numerous, crowded, obovate-spathulate, obtuse and mucronate, nearly flat, thinnish, obscurely keeled beneath, to 14 cm long and 7 cm broad, narrowed to 2 cm at base.

Inflorescences numerous, to 36 cm tall, usually 2-branched, peduncle slender, ascending, bracts oblong-oblanceolate, to 5 cm long and 15 mm broad, shortly aristate-mucronate at tips ; each secund-racemose branch with 12 to 15 flowers, pedicels to 12 mm long.

Flowers : Sepals unequal, longest to 12 mm long, narrowly deltoid-lanceolate, acute, widely spreading, corolla to 17 mm long, about 10 mm in basal diameter, petals bluntly keeled, with small but deep nectar-cavity within at base, carpels 10 mm long, nectaries transversely reniform, to 3 mm wide. 

Note :

Though Walther assumed that the plant in question - fom cultivation in a garden and without known origin in the wild - was probably a hybrid, he nevertheless published  it as a species !  For more details see p. 125 in https://www.crassulaceae.ch/docs/939bcf5a506299eba8cc8a7aa93e1973_Crassulacea__Nr._10_-_Revision_Walther_Echeveria.pdf