Strombocactus disciformis forma cristata.
A beautiful line of flowers!!!
This is the rare beautiful crested form of Strombocactus disciformis.
the standard species is usually a singled stemmed small
The body is
3 to 8 cm high,
reaching 20 cm in age, and 3 to 9 cm across. The
crown is slightly
felted. The colour is blue-green with greyish tinge, the
base covered with brown
corky spots in
age. It is composed of hard,
1 to 1.8 cm high. These tubercules are flattened and almost
truncated above and somewhat
4 to 5, erect and dark grey at the tips and pale grey at the base,
1.2 to 2 cm long, they become calcified, they are
caducous and in age fall at the stem base.
Arise on the
crown, measure about 3.5 cm in length and breadth, are shiny
cream coloured with occasional spots at the tip and in the
filaments are white or reddish, the
anthers yellow. The 8 to 10
stigma are white or yellowish.
7 mm across,
splits down its length.
Seeds: Very small.
Blossoming time: flowers emerge early in
spring and are freely produced throughout the
summer, remaining open for several days.
cause of cresting: The cause of cresting is not fully explained.
as to why some plants grow in this unusual form.
speculate that it is a genetic mutation. Others say it is the result of
a strike of
lightning or freeze damage, but whatever the stimulus, the growth
point of the stem has switched from a geometric point, to a line, which
folds and undulates as the crest expands. Though these crested
Strombocactus are very rare, cresting occurs naturally, and can be
encountered in many other cactus species.
Cultivation: It likes a sunny position.
It does best in a mineral soil; good drainage is essential. Water
sparingly during the summer months and keep dry in winter. It can
tolerate moderate shade, and a plant that has been growing in shade
should be slowly hardened off before placing it in full sun, as the
plant will be severely scorched if moved too suddenly from shade into
Propagation: Grafting, since it is difficult for cuttings to root.
The effect of different grafting
◄ (Above) A plant grafted on
stock: the plant remain in a
juvenile condition with short
tubercles and a lettuce green
crest is unstable and tends to
break in individual apexes, the
growing rate is high, the
stem is swollen and
(Below) A plant grafted on a short
stock: the plant soon develops
adult features: long
spines, plenty of
flowers on the
apical line ,
tubercles and the typical colour of
crest is very stable, the
growing rate is moderate and the plant looks very