Neomammillaria pottsii (Scheer ex Salm-Dyck) Britton & Rose 1923
Publication The Cactaceae (Britton & Rose) 4: 136 (-138, fig. 150) (24 décembre 1923).
Basionyme Mammillaria pottsii Scheer ex Salm-Dyck 1850
"99. Neomammillaria pottsii (Scheer).
Mammillaria pottsii Scheer in Saim-Dyck, Cact. Hort. Dyck. 1849. 104. 1850.
Mammillaria leona Poselger, Allg. Gartenz. 21: 94. 1853.
Echinocactus pottsianus Poselger, Allg. Gartenz. 21: 107. 1853.
Cactus pottsii Kuntze, Rev. Gen. Pl. 1: 26l. 1891.
More or less cespitose, the individual plants cylindric, 12 cm. long or more; tubercles almost hidden by the spines; radial spines about 30, white, weak, short; central spines 6 to 12, much stouter and longer, more or less ascending, grayish with brown tips; axils of tubercles woolly; flowers borne in a circle about 2 cm. below top of plant, about 1 cm. long; inner perianth-segments light purple, somewhat spreading at tip, acute; stamens pale, much shorter than the style, purplish above; stigma-lobes narrow; fruit red, clavate; seeds blackish brown, the surface deeply pitted.
Type locality: Not cited.
Distribution: In the highlands of the Rio Grande, Texas; Nuevo León and Coahuila to Chihuahua and Zacatecas, Mexico.
This species is widely grown in collections but the flowers are inconspicuous.
In the Engelmann Collection, now in the Missouri Botanical Garden, is a specimen labeled "Mammillaria pottsii vera — original coll. Dyck. Jan. 1857." This proves to be identical with the plant well known in our collections as M. leona. With specimens of this plant in hand Salm-Dyck's description, which heretofore we had not understood, is clearly interpreted, except that he states that the tubercle is slightly sulcate above. From the fact that Engelmann says that his species is "M. pottsii vera" we suspect that he may have had a plant like M. tuberculosa mixed with it. This seems to have been Poselger's idea, for he refers the plant to Echinocactus. doubtless on account of this supposed groove. The plant which Poselger describes under Echinocactus pottsianus, collected at Guerrero, south of the Rio Grande, is very different from Salm-Dyck's plant; his fragment, also deposited in the Missouri Botanical Garden, consists of a fruit, a few brownish seeds, and a spine-cluster, one attached to the top of a grooved tubercle, and is to be referred to Escobaria tuberculosa, or a related species. The specimen is too fragmentary to identify definitely. Poselger's misunderstanding of Salm-Dyck's plant left the way open for his species, Mammillaria leona, described shortly afterwards.
The description of the flower and fruit as given by Coulter is doubtless taken from Poselger but does not apply to the true M. pottsii. Our only Texas record is based on J. H. Ferriss's plant from the Big Bend of the Rio Grande, November 15, 1922.
Coryphantha pottsii occurs in C. R. Orcutt's Circular to Cactus Fanciers 1922 (unsigned and undated) to which he assigns M. leona.
Illustrations: Ann. Rep. Smiths. Inst. 1908: pl. 2, f. 3; Blanc, Cacti 70. No. 1359, as Mammillaria leona.
Figure 150 is from a photograph of a cluster of plants obtained in Zacatecas by F. E. Lloyd in 1908."
pottsii: en l'honneur de l'ingénieur états-unien John Potts qui dirigeait une mine à Chihuahua vers 1822 et collecta et envoya des plantes au prince Joseph de Salm-Reifferscheidt-Dyck (1773-1861).
Fiche créée le 09/04/2009.
Basionyme Mammillaria pottsii Scheer ex Salm-Dyck 1850
Synonyme de
Mammillaria pottsii Scheer ex Salm-Dyck 1850Commentaires
Publication originale:"99. Neomammillaria pottsii (Scheer).
Mammillaria pottsii Scheer in Saim-Dyck, Cact. Hort. Dyck. 1849. 104. 1850.
Mammillaria leona Poselger, Allg. Gartenz. 21: 94. 1853.
Echinocactus pottsianus Poselger, Allg. Gartenz. 21: 107. 1853.
Cactus pottsii Kuntze, Rev. Gen. Pl. 1: 26l. 1891.
More or less cespitose, the individual plants cylindric, 12 cm. long or more; tubercles almost hidden by the spines; radial spines about 30, white, weak, short; central spines 6 to 12, much stouter and longer, more or less ascending, grayish with brown tips; axils of tubercles woolly; flowers borne in a circle about 2 cm. below top of plant, about 1 cm. long; inner perianth-segments light purple, somewhat spreading at tip, acute; stamens pale, much shorter than the style, purplish above; stigma-lobes narrow; fruit red, clavate; seeds blackish brown, the surface deeply pitted.
Type locality: Not cited.
Distribution: In the highlands of the Rio Grande, Texas; Nuevo León and Coahuila to Chihuahua and Zacatecas, Mexico.
This species is widely grown in collections but the flowers are inconspicuous.
In the Engelmann Collection, now in the Missouri Botanical Garden, is a specimen labeled "Mammillaria pottsii vera — original coll. Dyck. Jan. 1857." This proves to be identical with the plant well known in our collections as M. leona. With specimens of this plant in hand Salm-Dyck's description, which heretofore we had not understood, is clearly interpreted, except that he states that the tubercle is slightly sulcate above. From the fact that Engelmann says that his species is "M. pottsii vera" we suspect that he may have had a plant like M. tuberculosa mixed with it. This seems to have been Poselger's idea, for he refers the plant to Echinocactus. doubtless on account of this supposed groove. The plant which Poselger describes under Echinocactus pottsianus, collected at Guerrero, south of the Rio Grande, is very different from Salm-Dyck's plant; his fragment, also deposited in the Missouri Botanical Garden, consists of a fruit, a few brownish seeds, and a spine-cluster, one attached to the top of a grooved tubercle, and is to be referred to Escobaria tuberculosa, or a related species. The specimen is too fragmentary to identify definitely. Poselger's misunderstanding of Salm-Dyck's plant left the way open for his species, Mammillaria leona, described shortly afterwards.
The description of the flower and fruit as given by Coulter is doubtless taken from Poselger but does not apply to the true M. pottsii. Our only Texas record is based on J. H. Ferriss's plant from the Big Bend of the Rio Grande, November 15, 1922.
Coryphantha pottsii occurs in C. R. Orcutt's Circular to Cactus Fanciers 1922 (unsigned and undated) to which he assigns M. leona.
Illustrations: Ann. Rep. Smiths. Inst. 1908: pl. 2, f. 3; Blanc, Cacti 70. No. 1359, as Mammillaria leona.
Figure 150 is from a photograph of a cluster of plants obtained in Zacatecas by F. E. Lloyd in 1908."
Étymologie
Neomammillaria: du grec neos, nouveau, car le nom de genre Mammillaria créé par Haworth en 1812 avait été employé par Stackhouse en 1809 pour un genre d'algues, et Britton & Rose étaient opposés à la conservation du nom d'Haworth opérée au congrès international de botanique de Vienne en 1905 en contradiction avec la règle stricte de l'antériorité.pottsii: en l'honneur de l'ingénieur états-unien John Potts qui dirigeait une mine à Chihuahua vers 1822 et collecta et envoya des plantes au prince Joseph de Salm-Reifferscheidt-Dyck (1773-1861).
Numéros de collecte
Vous pouvez chercher les numéros de collecte pour cette espèce dans :- la base de Ralph Martin : Neomammillaria pottsii
- la base de Christophe Ludwig : Neomammillaria pottsii
Forum
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philippe (contacter l'auteur ou écrire aux admins de l'encyclopédie)Fiche créée le 09/04/2009.
Fiches de botanistes :
Britton, Nathaniel Lord
Rose, Joseph Nelson
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