sclerocactus parviflorus hybrid
This plant has very long
spines that are intermediate in shape to those of the parents.
centrals are brown with the new
growth of a bright red colour, the
radials are short and pure white.
Stem: Green, up to 20 cm tall and 6-12 cm
in diameter. It has vertical ribs with
Areoles : 0.1-0.5 cm in diameter at the summits of the
tubercles, and generally 0.3-1,5 cm apart.
Glands, which are
homologous with spines, are frequently on the
adaxial sides of areoles which do not produce flowers
Central spines usually 3-4, flattened, ±
flexible, grooved, twisted,
papery in texture, 4-5 cm long. Often obscuring the surface of the
Radial spines parallel to the stem surface,
cluster, ashy-white, 3-9 mm long.
Flower: On the new growth of the current
season near the apex of the stem. Yellowhis,
bell-shaped, with a brownish central
midstripe, 2.5-4.5 cm wide.
Fruit: Green, often changing to tan,
spherical, 1.2-2.0 cm long,
maturity along a
dorsal slit and around the
watering, because excess of water causes mature
individuals to rot and die, especially after
Sun Exposure: Full sun to partial shade.
Cultural Practices: Needs
Frost Tolerance: Very
frost hardy, above approx -12° C.
Temperature for optimum
germination: night minimum approx 17 day maximum,
up to nearly
40 C, at any time of
year with proper temperatures and
daylength (ca.13-14 hours); it is possible to extend day-length with
artificial lights. Anyway the seeds
germinate slowly with extreme difficulty and a low rate of success.
stratification help, alternately
thaw both wet and dry, but don’t keep wet, alternate wet and dry
with changing temperatures.
Germination can take several years,
so keep pot and try again next year. Seedlings do not do well either,
and some die each year, for this reason plants are commonly
grafted on hardy stocks like
this case they are easy to grow and no special skill is required.
conspecific taxa, varieties, forms and cultivars of Toumeya