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Updated 20 October 2000

Weberocereus glaber

Synonymy
v. glaber
Cereus glaber Eichlam (1910) Monatsschr. Kakteen. 20:150
Werckleocereus glaber (Eichlam) Britton & Rose (1917) Addisonia 2:13
Weberocereus glaber (Eichlam) D. Hunt

v. mirandae
Selenicereus mirandae Bravo (1967) Cact. Succ. Mexi. 12:52
Werckleocereus glaber v. mirandae (Bravo) Kimnach (1978) Cact. Succ. Journ. U. S. 50:270
Weberocereus glaber v. mirandae (Bravo) U. M. Eliasson (1986) Kaktus 21:44

Ethymology
Why Eichlam named this plant glaber (Lat. for nude).

History
J. D. Smith seems to have been the first collector of this plant. He found it in Guatemala 1892 and two herbarium specimens was sent to the Field Museum of Chicago. This collection was overlooked and it was not until 1909 when futher specimens was collected by Eichlam that it was recognized as a new species. It seems likely that the Eichlam collection are still in cultivation in Europe.

In 1954, Thomas MacDougall found this species in Chiapas, Mexico. It differs slightly from the Guatemala-collections and are recognized as a variety.

Description
Stems
scandent, clambering or sprawling, branching, producing aerial roots, stiff, to 8 m long or more, (1,5)2,5-3,5(-4,5) cm thick; ribs 3; areoles with black, later white wool, internodes (1-)3-4(-6) cm; spines (0-)1-3(-5), 1-3 mm long, subulate or subacicular, cream to brown; epidermis light green, later faintly blue-glaucous.
Flowers produced from subapical areoles, (9-)1-14 cm long, 10-15 cm wide, nocturnal, odorous; pericarpel 2-2,5 cm long, 15-20 mm thick, entire receptacle 5-6,5 cm long, 13-20 mm thick at middle, 30-40 mm at apex, yellowish green at base, green at apex, podaria with appressed deltoid, bracteoles, areoles with brownish black wool and 1-5 sinous, white, brownish or blackish hairs, spines -12, acicular, white, yellowish, brownish or blackish; outer tepals rotate-recurved, ascending, lanceolar to sublinar, innermist somewhat oblanceolate, 0,5-7 cm long, 5-10 mm wide, mucronate or dentate at apex, yellowish green with reddish apices, innermost greensih yellow to cream; inner tepals ascending, oblong-oblanceolate, apices obtuse or subacute, incised dantate, 5-7 cm long, 10-18 mm wide, cream; stamens declinate, those of throat circle less so, inserted in two zones, shorter than tepals, anthers yellow; style 8-9,5 cm long, as long or longer than tepals, stigma lobes 12-16 hardly expanding, papillose, yellowish.
Fruit 7 cm long, 6,2 cm wide, dull light yellow, fragrant, with hairs and spines, seeds brownish black.

Two varieties are recognized:

 

v. glaber

v. mirandae

flowers

9-10cm

(10-)12-13cm

floral hairs

rather sparse, 10-15 mm long.

more profuse, to 20 mm long.

 

 

Illustration from Britton & Rose (1920)

Origin and habitat
Guatemala (Sacatepequez) and Mexico (Chiapas). 1.200-1.900 m alt, in open woods. The Mexican plants are referable to
v. mirandae.

Systematics
This species is close to the Costa Rican W. tonduzii. The flowers are also ver similar to those of Selenicereus atropilosus and this species is somewhat intermediate between Weberocereus and Selenicereus.

Cultivation
Provide a compost which contains humus; during the growing period the plant requires warmth, sun and moisture; as well as suitable fertilizer; in winter it can be kept at 10ºC (50ºF). Very free flowering.

 

W. tonduzii

W. glaber

stems

non-glaucous, spines nearly or entirely lacking

slightly glaucous, spines 2-4, 1-3 mm long

flowers

8 cm long or less.

10-12 cm long.

inner tepals

oblong

oblanceolate

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