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Gymnocalycium denudatum var. fleischerianum hort.
Catalog name. Pubbl. in Bercht Catalogue 1992/93
Family: CACTACEAE

Accepted Scientific Name: Gymnocalycium paraguayense f. fleischerianum (F.Haage) Mereg., D.Metzing & R.Kiesling
Candollea 57: 313 2002.

Gymnocalycium denudatum var. fleischerianum (Gymnocalycium paraguayense f. fleischerianum) Photo by: Alexander Arzberger

Synonyms:

See all synonyms of Gymnocalycium paraguayense
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Accepted name in llifle Database:
Gymnocalycium paraguayense (Mundt) Schütz & Moser
Friciana VIII, no. 47: 3- 15 (1972); cf. Rowley in Repert. Pl. Succ. (I. O. S.). 23: 7 (1972 publ. 1974).
Synonymy: 29 Accepted name in llifle Database:
Gymnocalycium paraguayense f. fleischerianum (F.Haage) Mereg., D.Metzing & R.Kiesling
Candollea 57: 313 2002.
Synonymy: 14
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Subspecies, varieties, forms and cultivars of plants belonging to the Gymnocalycium paraguayense-fleischerianum group

Accurarated systematics studies based on macromorphology, micromorphology and molecular (RAPD methods), have shown that Gymnocalycium paraguayense (K. Schum.) Hosseus and Gymnocalycium fleischerianum Backeb. (Cactaceae), previously considered as two different species, resulted to be very homogeneous and suggest that all populations should be referred to a single species, composed of two taxa at forma rank. The furrow on the rib between areoles is the main diagnostic character to separate G. paraguayense from G. fleischerianum. However in habitat plants revealed a high intra- and interpopulation level of variability, so that usually only the furrow on the ribs allowed the taxa to be separated; however, in a few single plants even this character is not reliable. Often the plants attributed to G. paraguayense grow in less shallow soil and have a rather flat stem, while those referred to G. fleischerianum are found in shallow soil at the margin of rocky outcrops, where they have a more rounded stem. The general aspect of the plants from each population is usually more or less characteristic.

  • Gymnocalycium paraguayense (Mundt) Schütz & Moser: (f. paraguayense) has 8-9 ribs divided into noticeable tubercles and 3 to 9 (mostly 5) radial spines. It is an extremly variable species. Furrow on the rib between areoles present.
  • Gymnocalycium paraguayense f. fleischerianum (F.Haage) Mereg., D.Metzing & R.Kiesling: It has more spines (up to 9 or more per areole), somewhat curved and close to the often rounder body. Furrow on the rib between areoles absent.
  • Gymnocalycium vieditzianum Piltz: It distinguish for the grey-bronzed epidermis and shallow tubercles; It has typically 5 spines.

28009 alexander Alexander Arzberger
Gymnocalycium denudatum var. fleischerianum (Gymnocalycium paraguayense f. fleischerianum) Photo by: Alexander Arzberger
28023 alexander Alexander Arzberger
Gymnocalycium fleischerianum, AA 155, S Piribebuy, 132 m, Dep. Cordillera, Paraguay. (Gymnocalycium paraguayense f. fleischerianum) Photo by: Alexander Arzberger

28024 alexander Alexander Arzberger
Gymnocalycium fleischerianum, AA 155, S Piribebuy, 132 m, Dep. Cordillera, Paraguay. (Gymnocalycium paraguayense f. fleischerianum) Photo by: Alexander Arzberger
28025 alexander Alexander Arzberger
In habitat. (Gymnocalycium paraguayense f. fleischerianum) Photo by: Alexander Arzberger

28027 alexander Alexander Arzberger
Gymnocalycium denudatum var. fleischerianum (Gymnocalycium paraguayense f. fleischerianum) Photo by: Alexander Arzberger
28048 alexander Alexander Arzberger
Gymnocalycium denudatum var. fleischerianum (Gymnocalycium paraguayense f. fleischerianum) Photo by: Alexander Arzberger

28030 alexander Alexander Arzberger
Gymnocalycium denudatum var. fleischerianum (Gymnocalycium paraguayense f. fleischerianum) Photo by: Alexander Arzberger
28040 alexander Alexander Arzberger
Gymnocalycium denudatum var. fleischerianum (Gymnocalycium paraguayense f. fleischerianum) Photo by: Alexander Arzberger

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