In addition to
its showy flowers, this plant has splendid, strong, white
spination making it attractive all year round.
cylindrical as they
age with marked
ribs, 20cm tall.
Ribs: 8, distinct. Tubercles rounded. Areoles with glands.
Spines: Dense thin
radials with pinkish
central spines covering the
Flowers: 55-100 mm wide, pink with a red throat from early spring
Cultivation: It is a summer grower species easy to cultivate. Water
regularly from Spring to Autumn, but do not overwater, can become too
elongated if compost is too rich. Requires full sun or light shade and
careful watering to keep plant compact with strong coloured spines.
Needs good drainage and very porous potting mix, In Winter, keep dry.
Reproduction: From seed, since the plant rarely produces
Scientific name: Thelocactus bicolor var. bolaensis
(Rünge) A.Berger 1929 (This plant sometimes is
Origin: Coahuila, Mexico.
Conservation status: Listed in
CITES appendix 2.
Type locality: Cerro Bola
- Echinocactus bolaensis Ruenge
- Thelocactus bicolor ssp.
bolaensis (Runge)Doweld 1999
Flower are beautiful, large and pink.
T. bicolor v bolansis
SB567 Brewster Co. TX. USA.
Plant from this
population have red
flat spines. This
frost resistant to -12°C
Photo of conspecific taxa,
varieties, forms and of
plants belonging to the Thelocactus
Taxon has lots of
synonyms ( like many other
cacti) whit several controversial
varieties and subspecies and comprises a multitude of different
forms, but where each form is linked to others by populations of plants
with intermediate characteristics):
bicolor var. bicolor (Frost hardiness -7°C )
- T. bicolor var.
bolaensis (Frost hardiness -12°C ) Origin: Coahuilafrom
Sierra Bola, up to 20 cm tall.
T. bicolor var. commodus It has been described as
having only one, porrect, central spine, but with a careful
observation it is possible to notice that the upper central spines are
so appressed to the stem that they can be easily mistaken for radials.
- T. bicolor var. ellipticus is
referable to bicolor.
T. bicolor var. flavidispinus (Frost hardiness -12°C
) Texas 8cm in diameter, 5cm tall.
T. bicolor var. heterochromus
T. bicolor var. pottsii (Referable to bicolor var.
- T. bicolor var. rhodophthalmus is referable to
T. bicolor var. schottii (Frost hardiness -12°C) coming
from the Big Bend area Texas, Chihuahua) characterized by a very long,
papery upper spine.
T. bicolor var. schwarzii 1 0° F (-12°C) Tamaulipas
- T. bicolor var. texensis is an invalid name
for a Texas form.
- T. bicolor var. tricolor (Frost hardiness -7°C ) A
form with bright red spines. Plants with these characters can be found
around Saltillo, Coahuila.
- T. bicolor var. zwakii, It is not sufficiently
distinct to deserve a subspecies rank.
Thelocactus bicolor cv. INERMIS