Accepted Scientific Name: Rebutia einsteinii subs. gonjianii (R.Kiesling) Hjertson
Cactaceae Syst. Init. 15: 10. 2003 [Apr 2003] nom. invalid.
Lobivia gonjianii (Rebutia einsteinii subs. gonjianii) Photo by: Valentino Vallicelli
This is one of the most distinctive Rebutias, and is very hard to obtain. This odd plant is very different looking from other plants in the genus.
Origin and Habitat: North-east Argentina (Jujuy, Salta), south east Bolivia
Type locality: A cuatro horas a mula oeste de Huacalera, Tilcara (Jujuy, Argentina)
Synonyms:
See all synonyms of Rebutia einsteinii
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Accepted name in llifle Database:Rebutia einsteinii Frič in MöllerDeutsche Gärtn.-Zeitung 1931, xlvi. 267, in obs.Synonymy: 40
Accepted name in llifle Database:Rebutia einsteinii subs. aureiflora (Backeb.) HjertsonCactaceae Syst. Init. 15: 10. 2003 [Apr 2003]Synonymy: 75
Accepted name in llifle Database:Rebutia einsteinii subs. gonjianii (R.Kiesling) HjertsonCactaceae Syst. Init. 15: 10. 2003 [Apr 2003] nom. invalid.Synonymy: 14
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Description: Rebutia gonjianiiSN|4990]]SN|11211]] (Rebutia einsteinii subs. gonjianiiSN|11210]]SN|11210]]) is a minuscule, slender, clumping cactus with thin finger-like stems branching from the base or higher in the manner of a miniature saguaro. This species is often seen lumped with Rebutia einsteiniiSN|11211]]SN|4990]].
Stems: Cylindrical, dark brownish-green coloured, but green in the new growth, and only about as thick as a pencil (1-1,2 cm in diameter). It would appear that in cultivation these plants grow larger, elongate and cluster more vigorously than in habitat.
Root: Thick, fleshy taproot.
Areoles: Thin, elogate, brown felted.
Spines: Tiny, pectinated less than 1 mm long.
Flowers: Large yellow, with a tinge of orange or brownish-yellow, from near stems bases.
Blooming Season: Blooms profusely in spring.
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Subspecies, varieties, forms and cultivars of plants belonging to the Rebutia einsteinii-aureiflora group
- Rebutia aureiflora var. albiseta (Backeb.) Borg: has 10 mm long white spines.
- Rebutia aureiflora var. albi-longiseta (Backeb.) W.T.Marshall: has long pure white bristles.
- Rebutia aureiflora f. boedekeriana (Backeb.) Šída: has has 11-12 thin radial spines and pale orange flowers.
- Rebutia aureiflora var. elegans (Backeb.) Buining & Donald
- Rebutia aureiflora f. rubelliflora (Backeb.) Buining & Donald: has orange-red flowers.
- Rebutia aureiflora f. rubriflora (Backeb.) Buining & Donald: has red flowers. Distribution: Salta, Argentina.
- Rebutia einsteinii Frič in Möller: (subs. einsteinii)
- Rebutia einsteinii subs. aureiflora (Backeb.) Hjertson: Has large mostly yellow or orange flowers with white throat. It is very variable. Distribution: North-west Argentina near to the Salta – Jujuy border around Quebrada del Toro.
- Rebutia einsteinii subs. gonjianii (R.Kiesling) Hjertson: has minuscule, thin finger-like stems branching from the base or higher in the manner of a miniature saguaro, from a thick, fleshy taproot. Spines pectinated less than 1 mm long. Distribution: Huacalera, Tilcara (Jujuy, Argentina).
- Rebutia einsteinii subs. gonjianii f. cristata hort.: Crested form.
- Rebutia euanthema (Backeb.) Buining & Donald
- Rebutia oculata Werderm.: has deep lateral incisions between areoles, few (6-8) radial spines less than 12 mm long and crimson flowers 4,5 cm long, 5 cm wide. Stigma pale green. Distribution: Challapata, Bolivia.
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Lobivia gonjianii (Rebutia einsteinii subs. gonjianii) Photo by: Cactus Art Lobivia gonjianii (Rebutia einsteinii subs. gonjianii) Photo by: Valentino Vallicelli Lobivia gonjianii (Rebutia einsteinii subs. gonjianii) Photo by: Cactus Art Lobivia gonjianii (Rebutia einsteinii subs. gonjianii) Photo by: Cactus Art Lobivia gonjianii (Rebutia einsteinii subs. gonjianii) Photo by: Cactus Art Lobivia gonjianii (Rebutia einsteinii subs. gonjianii) Photo by: Cactus Art Lobivia gonjianii (Rebutia einsteinii subs. gonjianii) Photo by: Valentino Vallicelli Lobivia gonjianii (Rebutia einsteinii subs. gonjianii) Photo by: Valentino Vallicelli Cultivation and Propagation: This species is probably the most difficult Rebutia to grow on its own (tuberous) roots, and it is often grown grafted. It tends to rot if too wet, and is best kept in a somewhat sheltered location. Careful waterings helps to keep the plant compact. Grow it in a very open mineral mix, (lots of pumice). Keep dry in winter. Hardy to -4°C for a short period. Rebutias grow in nature at high altitudes, and do not thrive well at high temperatures in cultivation. They will often go dormant in mid-summer and resume growth again when the weather cools in late August. They can tolerate amazingly low temperatures for long periods of time. All species can take frost, even when not bone dry. It is generally accepted that plants kept at too high a temperature, or watered too much during the winter rest period, will not bloom the following year. Give them an airy spot, and ensure good drainage. It is better that they be repotted regularly. Pots should be only slightly larger than the plant and root system.
The roots can break during repotting, and it is best to leave the compost dry for a while after repotting, to avoid rot. Repotting will increase the number and size of stems, and will increase the number of flowers produced. Repot yearly until reaching about 3 cm in size, then every two or three years will suffice. Repotting is best done at the end of winter, but can be done at other times, too. All plants, especially the young ones, are susceptible to red spider mites.
Propagation: By seeds or offsets (If available). The stems of larger grafted specimens can be rooted, but grow quite slowly. It makes sense to keep some stock plants for future propagation, or to replace the eventaul plant that rots or dies
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by Valentino Vallicelli
by Valentino Vallicelli
by Cactus Art