TENUIS  Rose, 1903  

NOT IN CULTIVATION.

Series Urbiniae

Type : Rose 2640a, collected in 1897 among rocks on top of mountains near Monte Escobedo, Zacatecas, Mexico.

Etymology : Latin adjective meaning thin, slender, referring to the narrowed petiole.

Distribution : Mexico (Zacatecas), only known form the type locality, never recollected.

First Description by Rose in Bulletin of the New York Botanical Garden 3: 7. 1903 :

Acaulescent, glabrous throughout.

Leaves fleshy, numerous, forming a flattened rosette, oblong, 4 - 5 cm long, much narrowed at base, acute.

Flowering branches slender, at first nodding or scorpioid, their leaves linear or at least narrow, with a small rounded spur at base.

Flowers sessile or nearly so, sepals very unequal, broadly ovate to linear, corolla 9 mm long, the segments in dry specimens keeled on the back, with scarious margins, not connivent in age, united for about one forth their length.

Flowers resembling those of E. desmetiana.

Note :

The plant Rose has described as Echeveria tenuis has never been recollected in Mexico. Whether it has ever been in cultivation is unknown. 

Walther on his part also wrote an Echeveria tenuis description, however the origin of his plant is totally unknown, the only information about it is the fact that he had received it from F. Schmoll, Cadereyta, Queretaro. Therefore his description is of no use and is to be ignored.