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Rebutia heliosa var. cajasensis

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Rebutia heliosa var. cajasensis
Flowers profusely with large orange-red, funnel-shaped, long -necked blooms in spring. This is one of the most floriferous cactus.
 


        Silvery pectinated spines & brown areoles make

 
this plant very attractive even when not in
bloom.       

.

.

Photo of conspecific taxa, varieties, forms and cultivars of Rebutia heliosa:

Family: Cactaceae (Cactus Family)

Scientific Name: Rebutia heliosa var. cajasensis J.D.Donald 1980 (Unspecified)

Field numbers: L405, BB486.03, BB488.01, BB 89.01, SH405,

Distribution:  Cajas, Alto Cajas and Yesera, Mendez, Tarija, Bolivia.
Habitat: It grows in mountainous areas at an altitude around 2500 m 2800 m over sea level

Conservation status: Listed in CITES Appendix II

Etymology: The genus name "Rebutia " is named in honour of  "Pierre Rebut", 19th century French cactus dealer and expert.  The species name "heliosa" derives from the Greek "helios (ηλιος) which means “the sun” in allusion at the disposal of the spines and the Latinizing adjective suffix for noun “-osus" indicating plenitude or notable development.  ( The specific name implies: "of the sun").


This is a very distinctive plant even without flowers. It is particularly attractive, thanks to its tiny silver-white pectinate spines and brown areoles.
 

Description: Small clumping cactus with fine silvery spines arranged on globes so that it looks like orbs covered with small, white spiders. It readily forms a clustering mound.
The variety  “Cajasensis
 specifically describes the population from the Desfiladero de Cajas (altitude 2500 m) with orange-red or red flowers, larger heads with silvery pectinated spines.
Some books state that Rebutia heliosa v. cajasensis looks pretty much like many of the forms of Rebutia heliosa v. condorensis but lighter spined. Indeed, some books make both these varieties synonymous, whereas.
Root:
Tap root.

Stem: Grey green, 2-3(-4) cm wide, rarely higher than 4 cm.
Ribs: Spiraling with very tiny tubercles.
Areoles : Small, with brown felt and elongated.
Spines:
only radials 2-4(-5) mm long, silvery white, pectinated, spider-like, covering almost completely the small stems in a spiral pattern.
Flower: Large dark-orange to red, funnel-shaped, long -necked, 4 cm in diameter, 5 cm long.
Blossoming time: Profusely flowering in spring. (Rebutias are
self-fertilizing but aylosteras are not, and the latter can be fooled by introducing foreign pollen and then re-pollinating with its own pollen.)
 

 


Cultivation: These plants come from mountainous areas, so like bright light, cool and dry conditions in the winter; this is important for the flowers as well as for their health. Without this cool winter period (0-10° C) they normally won't get many buds. They have a thick taproot and are of difficult cultivation and rot prone because of a great sensitivity to the excess of watering, not easy to get to any large size on their own roots really a challenge to grow into a large clump. They are commonly grafted to avoid root problems and to make easier to grow. Sun Exposure: Suited for sunny-brightly exposure; can tolerate light shade.
Cultural Practices: Suited for airy exposures. Needs deep pot and good drainage to accommodate its tap root.
It is very cold resistant  as low as to -10° C or less for short periods of time. It is a fine plant for a rock garden or container, contrasts well with agaves, yuccas, and low-growing flowering plants.
Pests & diseases:   R. heliosa is especially prone to root rot, therefore, underpot in a smaller container filled with very porous compost.

Propagation: Cutting as it branches freely from the base; Also can be grown from seeds or graft.  Seeds can be sown in the spring or summer. The seedlings should not be disturbed until they are well rooted, after which they can be planted separately in small pots.
 

Photo gallery: Alphabetical listing of Cactus and Succulent pictures published in this site.

Photo gallery Rebutia


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This old page has been moved! Click the link next on the right to enter the new Enciclopedia of Cacti. We hope you find this new site informative and useful.

The Encyclopedia of Cacti