Welsh & S. Goodrich 1980
Major L.F. Brady collected this species in July 1958, and it is named
Marble Canyon Cactus
Brady Plains Cactus
Conservation status: Listed in
CITES appendix I
Origin: From Navajo Bridge
to House Rock Valley, (northern Arizona), USA. 1140-1350 m. of elevation.
Scattered populations along both sides that tend to be endemics.
Grows in gravelly, gently sloping benches and terraces in
sunny situations. Mycorrhiza are associated with the roots of this
cactus. The fungus is acquired from the parent plant (the seed
germinating immediately alongside the parent plant) or from the roots of
grasses. The plants retracts in the ground during dry periods.
(L. Benson) W.H.
Published in: Cacti of
the Southwest, ed. 2, 97, 1963.a
- Pediocactus bradyi
ssp.bradyi (Engelmann) L. Benson
Published in: Cact. & Succt. J. (US) 34:19,
- Pediocactus simpsonii
- Puebloa bradyi
Description: Small globular semi-globose stem,
4-6 cm tall ,5 cm in diameter (in habitat forms clumps
are only 1 - 2 cm
across) elliptic areoles, densely felted; generally no central spine; 12
to 15 short spreading radial spines, almost pectinate, white to yellow,
2 to 6mm long
Flowers: Yellow to olive-white silky, 2.5-4 cm in diameter, 2 cm
high in early March-April. Back of petals brown-edged in white.
Cultivation: Under cool temperatures and wet conditions, it is
highly susceptible to root rot. For this reason it is usually cultivated
as a grafted plant, which is very easy to cultivate and free flowering.
Best for full sun exposures.
dormant on the plant
apex all winter, they will then open in
spring when the temperature rises.
To avoid any damage to
the buds donít let grafted plants that stay in the heated
greenhouse completely dry out.
Some light watering in winter
useful for keeping the flower