Mammillaria duwei forma
This is a true oddity and some say that this
is nothing else than a abnormal root grafted upside down.
Description: This plant is very different from
Mammillaria duwei, it reveal its true identity only when
an occasional normal areole produces a tuft of white feathery spines. It
is thought by some that it is nothing else than a monstrous root grafted
upside down, in fact it produces easily
adventitious roots in any part of its body. It
forms large low
clusters of hard, corky-textured
creamy-brownish, greenish and pinkish fissured protuberances, some only a few centimetres across.
The plant looks more like
succulent or rocky material than a
cactus. This cultivar shows many growing
variations, with different crested and monstrous shapes.
Cultivation: Mammillaria duwei "mostruosa"
is almost always seen grafted on a stronger stock, but seems it can
grows well on its
own roots too. The plants on their roots are quite difficult
to grow long enough to produce clumps.
Need regular water but do
not water again until dry
as it is specially sensitive to over
watering; plants should be allowed to become crowded
in their pot. Keep in shallow pot. It require high level
of sun light but can be sunburned if moved
from shade/greenhouse into full sun too quickly. During the spring it
may be able to take full sun until the heat arrives at the end of
spring. In an area that has hot afternoon sun, it may be able to take
full morning sun, but requires afternoon shade or afternoon light shade. If grown correctly, it will reward the grower with
stronger and healthy growth. Keep well
ventilated, as it is prone to
root rot. Also, it is a species that is
dormant in the winter and require very little water (maybe even none)
during the cold months. Protect from
freezes. Minimum of 5º C for safe
Propagation: Grafting or cuttings; leave them attached to form a cluster, or wait until they are 1/3
the size of the parent and then detach and plant.
Photo of conspecific taxa, varieties, forms and cultivars of