Jovibarbas: Plant Care and Collection of Varieties

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Introduction to Jovibarba
The genus Jovibarba has recently been changed to the genus of Sempervivum. The list below shows the old and current botanical names for these plants:
Jovibarba heuffelii = Sempervivum heuffelii
Jovibarba sobolifera = Sempervivum globiferum ssp. globiferum
Jovibarba hirta = Sempervivum globiferum ssp. hirtum
Jovibarba allionii = Sempervivum globiferum ssp. allionii
Jovibarba arenaria = Sempervivum globiferum ssp. arenarium

The above species have pale-greenish-yellow or yellow campanulate (bell shaped) flowers with about six petals, while all other Sempervivum species have pink, red, yellow or white actinomorphic (star shaped) flowers with around twice as many petals.

Most reproduce by offsets except for S. heuffelii. The globiferum species have a common name of 'Rollers'. They produce offsets on short, brittle stolons that easily break causing the tiny round offsets to roll away from the parent plant. They can roll some distance before coming to rest. It isn't long before they start sending out roots, even if they have landed on their heads. Somehow they upright themselves and form a new colony.
The heuffelii species produces offspring within the mother plant, forming new rosettes from the same crown and root. To propagate it must be divided or split with a knife.
It also produce seeds via sexual production.

All of the globiferum species easily cross pollinate, but the seedlings may not come true to the parent plant if other species are in the vicinity. But you could get interesting crosses. S. heuffelii also produce seeds, and occasionally cross pollinate with the different globiferum species. These crosses have been given the name of S. x nixonii, and each plant can show characteristic of both species.
The species shown here do not seem to cross pollinate with the other Sempervivum species.

Awards for Sempervivum
AM*= Award of Merit New cultivars could be submitted to the Society for evaluation and after two years trials, outstanding new plants were given an Award of Merit (AM*)
GR* = Gold Rosette
SR* = Silver Rosette
BR* = Bronze Rosette

Countries of origin of hybridizers:
(AL) ALBANIA / ALBANIE / ALBÁNSKO
(AT) AUSTRIA / AUTRICHE / RAKÚSKO
(BE) BELGIUM / BELGIQUE / BELGICKO
(BG) BULGARIA / BULGARIE / BULHARSKO
(CA) CANADA / CANADA / KANADA
CH) SWITZERLAND / SUISSE / ŠVAJCIARSKO
(CZ) CZECH REPUBLIC / RÉPUBLIQUE TCHEQUE / CESKÁ REPUBLIKA
(DE) GERMANY / ALLEMAGNE / NEMECKO
(DK) DENMARK / DANEMARQUE / DÁNSKO
(ES) SPAIN / ESPAGNE / ŠPANIELSKO
(FR) FRANCE / FRANCE / FRANCÚZSKO
(GR) GREECE / GRECE / GRÉCKO
(IE) IRELAND / IRLANDE / ÍRSKO
(IT) ITALY / ITALIE / TALIANSKO
(MK) MACEDONIA / MACEDOINE / MACEDÓNSKO
(NL) THE NETHERLANDS / PAYS-BAS / HOLANDSKO
(SK) SLOVAKIA / SLOVAQUIE / SLOVENSKO
(UK) THE UNITED KINGDOM OF GREAT BRITAIN / GRANDE BRETAGNE / VELKÁ BRITÁNIA
(US) THE UNITED STATES OF AMERICA / ETATS-UNIS / SPOJENÉ ŠTÁTY AMERICKÉ
(YU) YUGOSLAVIA / YOUGOSLAVIE / JUHOSLÁVIA




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