Echeveria crenulata (engl) PDF Imprimer E-mail
Echeveria - Species
Écrit par Margrit Bischofberger   
Mardi, 23 Décembre 2008 17:56

Echeveria crenulata Rose

 

First Description by Rose, 1911:

(Contribution of U.S. National Herbarium, 13(9): 295, 1911)

 

Echeveria crenulata Rose, sp. nov.


Caulescent, the stem in cultivated specimens short but in wild specimens much elongated and enlarged; basal leaves in the wild plant broadly obovate, more than 30 cm. long, 15 cm. broad, rounded at apex, tapering at base into a very distinct petiole; stem leaves pale green, a little glaucous, the margin wavy and purplish red; leaves on flowering stems acute, ovate to spatulate, tapering into a stout, thick petiole; inflorescence a short panicle, the lateral branches short, few-flowered, the bract instead of subtending the branch usually carried up for some distance on the peduncle; sepals widely spreading, very unequal, acute; corolla 15 mm. long, strongly angled, yellowish red, its lobes acute.


Type: U.S. Notional Herbarium no 454957, collected by J.N. Rose and J.H. Painter near Cuernacava, Morelos, Mexico, September, 1903 (no. 797). No 790 of Rose and Painter is the same. The species has flowered repeatedly in Washington and New York.

 

Collecting succulents in Mexico, 1935, CSJA V07, N°9, p.137 by E. Walther.

“At Cuernavaca we renewed our acquaintances made last season, with Srs. Oestlund and Nagel, as well as with Echeveria crenulata, common on walls, steep banks, lava-flows, etc.”

Echeveria crenulata on walls at Cuernavaca.

 

Description by Eric Walther: Echeveria, 1972


Stem to over 10 cm. tall, sometimes budding from near base; leaves rather few, rhomboid-obovate, to over 10 cm. long, 7 cm. broad or more, strongly mucronate to acute, narrowed to width of 2 cm. at base; margins flat, or strongly and finely undulate, scarcely crenulate, not at all glaucous; inflorescences one to four, to over 50 cm. tall; peduncle stout, erect; lower bracts numerous, ascending, obovate-cuneate, mucronate to acutish, to 5 cm. long, at base narrowed into stout petiole; panicle with nine or more short, secund-racemose branches, each with 4 to 12 flowers; the bracts subtending these branches usually borne some distance above base of branch, instead of being borne on peduncle as is normally the case in the genus; pedicels to 10 mm. long; sepals unequal, linear-deltoid to oblanceolate, longest to 10 mm. long, acute, widely spreading, to recurved; corolla urceolate, pentagonal, to com-panulate above, to 18 mm. long, 12 mm. in basal diameter, at times to 16 mm. wide at mouth; petals bluntly keeled on back, with prominent basal hollow inside, spreading above the middle; nectaries subrotund, truncate, to 4 mm. broad. Flowers from November on. Description based upon living plants collected at Cuernavaca, 1934.


Color. Leaves elm-green tinged fawn-color, edged dark vinaceous-brown, at most only very slightly glaucous; peduncle corinthian-red, glaucous; bracts as leaves; sepals light purple-drab; corolla alizarine-pink to ochraceous-buff, inside naples-yellow; styles carmine, to maroon at tips; nectaries nearly white, faintly tinged pinkish.

(Photo of Marjorie Shields)

Discussion:

Until recently this has been the only photo of E. crenulata – possibly correct. At present there are 3 new photos to be found on the Globetrotters website, all by Pablo Carrillo Reyes.


The photo Fig. 93 in J. Pilbeam’s book “Echeveria” does not show the species, but a hybrid, probably one of Dick Wright’s hybrids. Whether Fig. 94 is correct, is not sure.


Whether E. crenulata is still in cultivation, we do not know, we rather doubt this. Plants in collections under this name are either E. shaviana or an E. hybrid with wavy margins.


We would appreciate any information on the possible existence of true E. crenulata in cultivation.