Hamatocactus sinuatus var. papyracanthus cv. Yellow spines
The eye-catching very long golden yellow papery spines can stop traffic.
Solitary, or sparsely clumping
Stems: Spheric to ovoid, dark green 10-30 × 7.5-20 cm.
Ribs: typically 13 ( to 17), undulate to deeply crenate,
Areoles: 1-3 cm apart , young ones with yellow felt.
Spines: 12-16 per areole; Central spines 4 per areole, curved
central spine strongly flattened, 5-10 cm × 1.3-3 mm, ± papery.
Flowers: Pale yellow 6-7.5 × 7-9 cm; stigma lobes 8-10.
Fruits: Green, yellow-green, or olive, 20-25 × 10-15 mm.
Seeds: ca. 1 mm.
Blooming season: Early summer to autumn
Seedlings start flowering at the age of 4-6 years.
This beautiful cultivar has long flexuous
hamatacanthus var. sinuatus (A.Dietr.) L.Benson,
In: Cact. Succ. J. (Los Angeles). 41: 128. 1969.
Common Name: Yellow
Conservation status: Listed in
CITES Appendix II
Garden origin (Nursery
- Echinocactus sinuatus
In: Allg. Gartenzeitung 19: 345. 1851
sinuatus var. papyracanthus
hamatacanthus v sinuatus f papyracanthus
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
Cultivation: This species is easy and well worth growing.
Require little care once they have reached a nice flowering size. It 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
mould forming on the sugary
secretions from near the
Frost Tolerance: In winter keep completely dry at
5°C this usually aids in maintaining a healthier plant, but
it is hardy to -7°C.
Photo of conspecific taxa, varieties, forms and cultivars of
plants belonging to the Ferocactus hamatacanthus (H.
Taxon has lots of
synonyms whit several controversial varieties and subspecies: