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Hamatocactus setispinus forma brevispina
This is a chicest short spined cultivar that produce a
succession of large silky flowers in summer.
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Desription:
Solitary or slowly
offsetting,
globular.
Stem: Up to 15 cm tall, 10 cm in diameter; around 13 high
wavy
ribs, dark bluish green.
Areoles : 10-14 mm long, with short
wool.
Spines: Yellowish,
central 1 to 3
hooked (5 - 15 mm long);
radials 12 to 16 (5-15 mm long)
Flower: Silky yellow with darker red
throat , 3 - 4,2 cm across, 3,8 - 5,2(7) cm long.
Fruit: Red and
fleshy,
globular to
ovate, 8-11 mm long, that
dry and
fracture
basally at full
maturity.
Seeds: 1,3-1,7 mm long and 0,5 -0,8 mm diameter.
Phenology: Summer grower.
Blossoming time:
Summer, it flowers very well, even when quite young, producing
flowers in succession |
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Cultivation: This species is easy and
well worth growing. Require little care once they have
reached a nice flowering size. H. setispinus is suited for any
rich, well drained soil in full sun throughout the year
(But do better with some light shade in summer). Pot
culture: grow best in a well-drained container filled with a
porous cactus soil mixture that doesn't contain too much humus. To
insure robust plants water and fertilize during the aestival growth
cycle, this plant need plenty of water (indicatively to about once a
week) But needs to be avoided wetting the bodies of these plants while
they are in sunlight. A wet cactus in the sun light can cause sun
burning which can lead to scares or even fungal infections and death.
Care must be taken to prevent
sooty
mould forming on the sugary
secretions from near the
areoles.
Frost Tolerance: In winter keep completely dry at
5°C this usually aids in maintaining a healthier plant, but
it is hardy as less as -12 to -7°C
depending on the
origin. (Temperature
Zone: USDA 9-11)
Photo of conspecific taxa, varieties, forms and
cultivars of Hamatocactus setispinus:
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Family:
Cactaceae (Cactus
Family)
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Scientific Name:
Hamatocactus
setispinus
"brevispinus"
Conservation status: Listed in
CITES Appendix II
Origin:
Garden origin (Nursery
produced cultivar)
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 A
The satiny yellow
flowers have a contrasting red
throats.
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Reproduction: Seeds or
cutting. Seeds are the typical way of reproducing. These
cacti will easily grow from seeds and some from cuttings. Seeds can be
sown in the spring or summer in well-drained pots of soil for cacti and
sow the seeds thinly on top. Cover them with a bit of fine quartz grit.
Moisten and lay a piece of glass across the top. The pots should be set
in a warm greenhouse until they start to sprout after which the glass
should be progressively removed so they can receive full light and air.
It isn't good to keep the glass over the seedlings. The seedlings well
developed can be planted separately in small pots.
Cuttings made from pieces of the stem of any size can be detached and
laid aside for a few days to allow a protective "skin" to form over the
cut. They can then be planted in pots. Place them in a spot where
they'll receive sun and do not water until the soil becomes fairly dry.
After a while the soil can be moistened regularly but never kept
constantly saturated.
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Cultivation
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