ARS Seed list 2009

Notes:

Based on the Pollen-to-Seed Program Mr. Theqvist formed in 2007 a small hybridizer team in Finland. The results in 2007 were good and the hybridization work was continued in 2008. The two other hybridizers in addition to Mr. Theqvist were Osmo Jussila from Naantali and Jaakko Saarinen from Arboretum Mustila.

The main aim in the hybridization program was to to get hardy reds by using the super hardy R. brachycarpum ssp. tigerstedtii and hardy proven Finnish hybrids as seed parent and pollen from Rhododendron species with red flowers. In addition there were side goals for beautiful leaves and good indumentum. As a special there are seeds from a R. brachycarpum Korean form, cross-pollination between 5 plants, collected 1976 in South Korea as R. fauriei var. rufescens.

Links for further information:
Mr. Theqvist's  seed list for ARS 2009 Seed Exchange @: http://www.rhodogarden.com/ARS/Seed_X_2009.html
Breeding Hardy Rhododendrons in Finland @: http://www.rhodogarden.com/cross/elepidotes.html
The Finnish Rhododendron Club @: http://www.dendrologianseura.fi/rhodokerho/club.html
Arboretum Mustila @: http://www.mustila.com/index2.htm

           Kristian Theqvist, Finland, zone 5b
           Pollinated by Osmo Jussila, Naantali, Finland and by Jaakko Saarinen, Arboretum Mustila, Elimäki, Finland:

  1. R. brachycarpum ssp. tigerstedtii *1 x R. neriiflorum RSF 1974/086 *10, cp
  2. R. brachycarpum ssp. tigerstedtii *1 x R. strigillosum RSF 1999/262 *11, cp
  3. R. brachycarpum ssp. tigerstedtii *1 x R. thomsonii RSF 1967/716 *12, cp


    Kristian Theqvist, Finland, zone 5b

    Pollinated by Osmo Jussila, Naantali, Finland:

  4. R. brachycarpum ssp. tigerstedtii *1 x R. barbatum RSF 1965/304 *13, cp
  5. R. smirnowii *4 x R. strigillosum RSF 1999/262 *11, cp
  6. R. smirnowii *4 x R. thomsonii RSF 1967/716 *12, cp

  7. Kristian Theqvist, Finland, zone 5b
    Pollinated by Jaakko Saarinen, Arboretum Mustila, Elimäki, Finland:

  8. R. brachycarpum low pink form *2 x R. neriiflorum RSF 1974/086 *10, cp
  9. R. brachycarpum Korean form, cp, collected as R. fauriei var. rufescens, *3, cp

  10. Kristian Theqvist, Finland, zone 5b

    Pollinated by Kristian Theqvist, Espoo , Finland:

  11. 'Hellikki' *5 x R. barbatum RSF 1965/304 *13, cp
  12. 'Kullervo' *6 x R. catacosmum RSF 1967/689 *14, cp
  13. 'Kullervo' *6 x R. mallotum RSF 1966/557 *15, cp
  14. 'Kullervo' *6 x R. pronum RSF 1974/047 *16, cp
  15. 'P.M.A. Tigerstedt' *7 x R. lanigerum RSF 1975/114 *17, cp
  16. 'P.M.A. Tigerstedt' *7 x R. sutchuenense hybrid *18, cp
  17. 'Pekka' *8 x R. macabeanum RSF 1975/052 *20, cp
  18. 'Pekka' *8 x R. sanguineum var. didymum *19, cp
  19. 'St. Michel' *9 x R. barbatum RSF 1965/304 *8, cp
  20. 'St. Michel' *9 x R. pronum RSF 1974/047 *16, cp

    *1. R. brachycarpum ssp. tigerstedtii
          See picture 1 at: http://www.mustila.com/english/rhododendrons.htm
    *2. R. brachycarpum low pink form
          Creeping form (to 50 cm tall) with deep pink corolla, possibly a hybrid, origin unknown, at Arboretum Mustila.
    *3. R. brachycarpum Korean form, cross-pollination between 5 plants, origin CW 1976 South Korea, Seorak-san, 38°08'N, 128°29'E, 1500 m a.s.l., as R. fauriei var. rufescens, coll. no. G01-76-761. Plants very similiar to R. brachycarpum ssp. tigerstedtii except corolla details and lower growth habit (1,5 to 2 m).
          See picture 2 at : http://www.mustila.com/english/rhododendrons.htm
    *4. R. smirnowii
          http://www.rhodogarden.com/Hybrids_Species/Elep_Species/smirnowii/index.html
    *5. 'Hellikki', smirnowii Seidel hybrid
          http://www.rhodogarden.com/Hybrids_Species/Finn_Elep_Hybrids/Hellikki/index.html
    *6. 'Kullervo', R. brachycarpum ssp. tigerstedtii x degronianum ssp. yakushimanum. Short (2 to 4 weeks) cold stratification may improve germination.
          http://www.rhodogarden.com/Hybrids_Species/Finn_Elep_Hybrids/Kullervo/index.html
    *7. 'P.M.A. Tigerstedt' (aka 'Peter Tigerstedt'), R. brachycarpum ssp. tigerstedtii x R. catawbiense var. album 'Glass'
          http://www.rhodogarden.com/Hybrids_Species/Finn_Elep_Hybrids/PMA_Tigerstedt/index.html
    *8. 'Pekka', R. brachycarpum ssp. tigerstedtii x (R. smirnowii Seidel hybrid)
          http://www.rhodogarden.com/Hybrids_Species/Finn_Elep_Hybrids/Pekka/index.html
    *9. 'St. Michel' (aka 'Mikkeli'), R. brachycarpum ssp. tigerstedtii x R. smirnowii
          http://www.rhodogarden.com/Hybrids_Species/Finn_Elep_Hybrids/Mikkeli/index.html
    *10. R. neriiflorum RSF 1974/086
          Info: http://www.rsf.citymax.com/catalog/item/1218867/918922.htm
    *11. R. strigillosum RSF 1999/262
          http://www.rsf.citymax.com/catalog/item/1218869/708162.htm
    *12. R. thomsonii RSF 1967/716
          Info: http://www.rsf.citymax.com/catalog/item/1218869/934954.htm
    *13. R. barbatum RSF 1965/304
          http://www.rsf.citymax.com/catalog/item/1086231/891943.htm
    *14. R. catacosmum RSF 1967/689
          http://www.rsf.citymax.com/catalog/item/1086231/893171.htm
    *15. R. mallotum RSF 1966/557
          http://www.rsf.citymax.com/catalog/item/1218867/918308.htm
    *16. R. pronum RSF 1974/047
           http://www.rsf.citymax.com/catalog/item/1218867/927358.htm
    *17. R. lanigerum RSF 1975/114
           http://www.rsf.citymax.com/catalog/item/1218867/706051.htm
    *18. R. sutchuenense hybrid, hardy plants at Helsinki Botanical Garden, origin from OP seeds of R. sutchuenense at Gothenburg Botanical Garden
          http://www.rhodogarden.com/ARS/sutchuenense_Hel_Bot.html
    *19. R. sanguineum var. didymum
          http://www.rhodogarden.com/ARS/sanguineum_var_didymum.html
    *20. R. macabeanum RSF 1975/052
          Info: http://www.rsf.citymax.com/catalog/item/1218867/918213.htm