Gaga1960 napisał(a):
Wyczytałam na jednej mądrej stronie fascynata gymnocalicjami,że jak jest 8 żeber to mihanovichii a jak więcej to friedrichii i teraz
zgłupiałam ,bo to co pokazujesz przeczy temu.
Nie jest to niestety tak proste i oczywiste. Na dowód daję porównanie tych gatunków.
Tekst pochodzi z książki
Pilbeam Gymnocalycium A Collectore Guide. Wklejam oryginalny angielski aby czegoś nie pokręcić.
Gymnocalycium friedrichii (Werdermann) Pazout
Stems of the type are about 6 to 8 cm in diameter, flat-globular to globular, later becoming taller than broad, to as much as 12 cm tall or more, eventually clustering from around the base in cultivation. Ribs are comparatively more prominent and sharper than in G. mihanovichii. Spines number 6 to 8, to 20 mm long, bristle-like, brown at first, later grey. Flowers are a dull greenish-white.
Reported from Bolivia, Laguna Redonda, and by Lau from Bolivia, north of Charagua; see also reported habitat for varieties below.
Collectors? numbers referred here are Lau 373; HU 311, 312, 313, 314.
Pokazane na tej fotce
Gymnocalycium friedrichii var. melocactiformis Pazout
This is a popular variety, not least for its lovely pink flowers, but it lives under the stigma of suspicion of hybrid origin. There seems to no real basis for this, and it comes true from seed and sets seed well in cultivation, which tends to speak against its being so. It has some banding, and grows to 10 cm or more wide, with 8 to 12 ribs. Areoles have creamy-white wool. Spines are all radial, usually about 5 in number, standing out, longer in relation to the body size than other varieties, to 2 cm long, yellowish-brown tipped dark brown. Flowers are slim-tubed, pale pink and slim-petalled.
Gymnocalycium mihanovichii (Fric & Gürke) Britton & Rose
This is one of the most well known and popular species, although confusion reigns between it and G. friedrichii, which has been combined and separated in the past according to differing taxonomic thinking. In broad terms G. mihanovichii is more a green or brownish-green bodied species, with usually quite prominent banding on the ribs, from paler colouring in transverse bands around the stem, while G. friedrichii has much more red colouring in its make-up, and less prominent or no banding as indicated above; flowers of the former are generally green or greenish-yellow or white, the petals not usually reflexing, so that the flower remains cup shaped or campanulate, while those of the latter are usually white or pink, and open wide at the top of the tube, reflexing to a right-angle or more, making a parasol shaped flower. Recent opinion has swung towards regarding G. friedrichii as a separate species, with perhaps closer relationships to G. anisitsii, perhaps intermediate between that species and G. mihanovichii. See therefore under G. friedrichii for this species and its varieties and forms.
The type of G. mihanovichii, is globular to flat-globular, becoming columnar with age in cultivation, to 5 cm wide, greyish-green, with about 8 acute ribs, and more or less prominent banding from paler colouring in transverse strips running from the areoles into the groove between the ribs. Areoles are small, 12 mm apart, with all radial spines, 5 or 6 in number usually, weak and flexible, yellowish to brownish-grey, about 8 to 10 mm long. Flowers are about 3 cm long and wide, with long, narrow tubes, green or yellowish-green, often tinged red. Fruit is long, spindle shaped. Reported from Paraguay, the road from Mariscal Estigarribia to Filadelfia from 70 to 350 km; by Piltz from Argentina, Chaco Austral, and by Lau from Bolivia, near Guanacosa.
Collectors? numbers referred here are Lau 372, P 242.