JUAREZENSIS  Walther, 1959

ORIGIN UNKNOWN. MOST PROBABLY LOST TO CULTIVATION.

Series Gibbiflorae

Type : T. MacDougall B-172. CAS 409864.

Distribution : Picked up in the Oaxaca market..Origin unknown,

First Description by Walther in Cactus and Succulent Journal US 31(2): 52. 1959 (of living plant cultivated at UCBG, 1958) :

Plant glabrous, caulescent with stem to 8 cm tall, usually simple.

Leaves to 20 or more, crowded in terminal rosettes, obovate-cuneate, acute and mucronate, thick and rigid, deeply concave above, beneath rounded and somewhat keeled, 5 cm long and 3 cm broad, greyish-green, somewhat glaucous.

Inflorescences 2, axillary, of 3 secund racemes, to 20 cm tall, peduncle erect or ascending, to 5 mm thick near base, vinaceous, lower bracts ascending, oblong-obovate, upcurved, concave above, rounded beneath, at the upcurved apex mucronate, to 25 mm long and 11 mm broad, greyish-green, above vinaceous, glaucous, racemes 10 to 12 cm long, ascending-spreading, with about 12 flowers each, upper bracts as the lower, but 15 mm long, brownish, pedicels slender, to 14 mm long, vinaceous.

Flowers : Sepals ascending to widely spreading at anthesis, subequal, longest 11 mm long, linear-oblanceolate, acute, convex on both surfaces, light greyish-green, corolla pentagonal, conoid-urceolate, to 12 mm long, 8 mm in basal diameter, scarlet, petals apiculate, with distinct basal nectar-cavity, light-orange-yellow inside, carpels 7 mm long, white below, yellow above, styles vinaceous, nectaries oblique, reniform, to 2 mm wide.

Flowering time June - August.

Note : 

1. In a letter to Reid Moran, Thomas MacDougall confirmed that he had picked up the plant in a market in Oaxaca, "said to have come from Ixtepeji", where - however - it had never been found. So the origin of E. juarezensis is unknown and the name seems to be rather ill-founded. It is not reported that E. juarezensis has ever been propagated, so it has to be considered lost to cultivation.

2. Plants collected by Reid Moran at the purported type locality in the Sierra Juarez with rosettes of 15 - 35 cm in diameter (of which C.H. Uhl made chromosome counts) correspond to E. spec. Cumbre.

3. The photos published on http://crassulaceae.com/crassulaceae.com/botanik/pflanzen/botspezies_seite_en.asp?main=121600&menu=1&bgt=cm&genus=ECHEVERIA&gnr=1610  represent E. spec. Cumbre.