Notocactus (K. Schumann) Frič (1928)

(Brasiliparodia, Malacocarpus, Wigginsia)
(greek notos = southern; latin cactus = cactus, thistle)
cactus of the south
Notocactus got its name because of its origin far distant in the south, inside of the older genus Echinocactus

globular, medium sized, partly short columnar; spines variabel, thin or broad, multi-colored or single-colored
flowers large, numerous, usually yellow with red stigma, also reddish, orange or with yellow stigma
fruits fleshy, at ripeness also thin-walled and slackly

Highslide JS


lowlands of Argentinia, Uruguay, Brazil, Paraguay
steppes and mountains

Growth period

warm, sunny and somewhat airy with cooling down in the night
prevent full sun for slightly spined species
a location outside of the greenhouse is temporarly possible
constant moisture and humidity during the growth period
permanent wetness is to prevent

Winter period

bright but not too cold at about 46–53F (8–12°C) not complete dry
some species of this genus require a warmer winter rest not colder than 53F (12°C)
(e.g. Notocactus mueller-melchersii)


the soil should be nutritious humus-rich and permeable to water
addition of coarse gravel, sand, loam and turf
Notocactus mueller-melchersii Frič ex Backeberg (1936)
Highslide JS
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Rio Grande do Sul


named after Mr. Mueller-Melchers
globular, later longish, ca. 3.1 in (8 cm) high, 2.4 in (6cm) Ø, dull green
ribs ca. 22
areoles initially white felted
to 18 radial spines, to 8 mm long, sidewards radiant, yellowish white
1 central spine, to 0.8 in (2 cm) long, mostly downward directed, light horn colored to yellowish,
above dark, at the base red-brown
flowers 2 in (5 cm) large, pale golden yellow, stigma pale carmine


Parodia mueller-melchersii (Frič ex Backeberg) N. P. Taylor (1987)
Ritterocactus mueller-melchersii
(Frič ex Backeberg) Doweld (1999)
CITES Appendix II
Description of "Kakteen von A bis Z" by Walter Haage with courtesy by Kakteen-Haage made available.