Lemaireocereus dumortieri (Scheidweiler) Britton & Rose

Publication Contributions from the United States National Herbarium 12(10): 425 (1909).
Basionyme Cereus dumortieri Scheidweiler

Synonyme de

Isolatocereus dumortieri (Scheidweiler) Backeberg

Commentaires

Publication:
"THE GENUS CEREUS AND ITS ALLIES IN NORTH AMERICA.

Lemaireocereus dumortieri (Salm-Dyck).
Cereus dumortieri Salm-Dyck, Cact. Hort. Dyck. Ed. 2. 210. 1850.
? Cereus anisacanthus DC. Mem. Mus. Paris 17: 116. 1828.
Type locality: Not cited.
Distribution: Michoacan, Zacatecas, Hidalgo, and Morelos, Mexico."

Des mêmes auteurs: The Cactaceae 2: 102-103, fig. 152 et 153, pl.XV, fig.2 (1920):
"21. Lemaireocereus dumortieri (Scheidweiler) Britton and Rose, Contr. U. S. Nat. Herb. 12: 425. 1909.
Cereus dumortieri Scheidweiler, Hort. Belge 4: 220. 1837.
Often tree-like, 6 to 15 meters high, the trunk proper short, 6 to 10 dm. long, 3 dm. in diameter or more, woody; branches many, erect almost from the first, with numerous constrictions, very pale bluish green or somewhat glaucous; ribs generally 6, sometimes 5 or 7, occasionally 9 on very old joints; areoles elliptic, approximate or often confluent, gray felted; spines various in number and in length, 10 to 20 radials, 1 central or more, the longer ones often 4 cm. long, all at first straw-colored but in age blackened; flowers 5 cm. long, the tube and ovary bearing small ovate scales with bunches of felt and occasionally bristles in their axils, the limb about 2,5 cm. broad; fruit oblong, small, 3 to 4 cm. long, reddish within, not spiny, its areoles nearly contiguous, felted; seeds brownish, 1,5 mm. long, dull, roughened.
Type locality: Incorrectly given as Buenos Aires (see note below).
Distribution: Central Mexico.
Our description is drawn from numerous specimens collected by Dr. Rose in central Mexico. This is the plant which passes as Cereus dumortieri in collections, but from the description alone one can hardly be certain. It ranges over a considerable territory, but is never abundant, being found generally as large isolated individuals on the sides of rocky hills and cliffs.
Greenhouse plants much resemble Pachycereus marginatus, and both species have small flowers; but the wild plants are very unlike and the fruit and seeds differ widely.
Although Scheidweiler in his original description of this species referred it to "Buenos Ayres," he doubtless made a mistake, as he must have done in his reference of Mammillaria obconella in the same publication. The original description does not correspond to any known South American cactus, but does represent fairly well our central Mexican species which passes under this name.
In 1845 the species was listed by Salm-Dyck (Cact. Hort. Dyck. 1844. 30) as from the Belgian Gardens (H. Belg.). In 1850 (Cact. Hort. Dyck. 1849. 210) he published an original description apparently based on the Belgian specimens; but evidently he had forgotten the older publication. Schumann and most writers since 1850 have assigned Prince Salm-Dyck as the author of this species. Weber (Dict. Hort. Bois 279. 1895) seems to have been the first botanist to refer the species to Mexico.
Cereus anisacanthus De Candolle (Mém. Mus. Hist. Nat. Paris 17: 116. 1828) is doubtfully referred here by Schumann. If it should prove to be the same, it would, of course, supplant the present name. Its two varieties, ortholophus and subspiralis (De Candolle, Mém. Mus. Hist. Nat. Paris 17: 117. 1828), so far as we can determine, belong here also.
This species is anomalous in Lemaireocereus, having very small flowers and spineless fruit, but the scales of the ovary sometimes subtend bristles, if not spines, in their axils.
Illustration: Hort. Belge 4: pl. 15, as Cereus dumortieri.
Plate XV, figure 2, shows the top of a plant brought by Dr. Rose from Cuernavaca, Morelos, Mexico, in 1906. Figure 152 shows the fruit of a plant from Hidalgo; figure 153 is from a photograph taken by him in Hidalgo, Mexico, in 1905."

Étymologie

Lemaireocereus: en l'honneur du botaniste français Charles Lemaire (1800-1871), cierge de Lemaire.
dumortieri: en l'honneur du botaniste, académicien et député belge Barthélemy Charles Joseph Dumortier (1797-1878), notamment connu pour son "Analyse des Plantes" publié en 1829.

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Auteur

philippe (contacter l'auteur ou écrire aux admins de l'encyclopédie)
Fiche créée le 17/04/2003, mise à jour le 31/12/2004.


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Plus de photos de Lemaireocereus dumortieri avec Google images.

Fiches de botanistes :

image non disponible Britton, Nathaniel Lord
image disponible Rose, Joseph Nelson

Fiche du genre :

image disponible Lemaireocereus Britton & Rose

Synonymes :

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Espèces du même genre :

image disponible Lemaireocereus hollianus (F.A.C.Weber) Britton & Rose




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