| BIOLOGY | 113 Winter frost damage - flower buds | 113 Winter frost damage - flower buds | 7 - high, about 2/3 buds opened or were deformed | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 001 Plant - persistence of leaves | 001 Plant - persistence of leaves | 2 - semi-deciduous | 2016 Research Institute of Ornamental Gardening_Rhododendron | | Out of Season |
| MORPHOLOGY | 009 Young leaf - waxy bloom on the upper side | Young leaves are observed as soon as they have reached full size | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 010 Young leaf - pubescence on the upper side | Young leaves are observed as soon as they have reached full size | 3 - sparse hairs | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 011 Young leaf - pubescence on the lower side | Young leaves are observed as soon as they have reached full size | 3 - sparse hairs | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 023 Inflorescence - attitude on the shoot | Fig. 3 | 1 - terminal | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 024 Inflorescence - number of flowers | 024 Inflorescence - number of flowers | 3 - low 3 - 5 | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 028 Flower - funnel-shaped | Fig. 6 | 2 - widely funnel-shaped | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 035 Flower - number of corolla lobes | 035 Flower - number of corolla lobes | 3 - low 5 | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 036 Flower - type of the flower | Fig. 8 | 1 - single | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 037 Flower - corolla undulation of margins | 037 Flower - corolla undulation of margins | 5 - medium | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 038 Flower - colour of corolla edges in comparison with flower colour | 038 Flower - colour of corolla edges in comparison with flower colour | 5 - the same | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 039 Flower - colour stability (comparison old and young flower) | 039 Flower - colour stability (comparison old and young flower) | 5 - the same | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 045 Flower - yellow orange colour on inner side | 045 Flower - yellow orange colour on inner side | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 046 Flower - orange colour on inner side | 046 Flower - orange colour on inner side | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 048 Flower - orange red colour on inner side | 048 Flower - orange red colour on inner side | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 049 Flower - red colour on inner side (light to medium deep tones) | 049 Flower - red colour on inner side (light to medium deep tones) | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 050 Flower - red colour on inner side (medium deep tones) | 050 Flower - red colour on inner side (medium deep tones) | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 057 Flower - violet colour on inner side | 057 Flower - violet colour on inner side | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 058 Flower - violet blue colour on inner side | 058 Flower - violet blue colour on inner side | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 060 Flower - blue colour on inner side | 060 Flower - blue colour on inner side | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 063 Flower - deepness of colour on inner side | 063 Flower - deepness of colour on inner side | 1 - very light R.H.S. - D | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 064 Flower - supplemental colour on inner side | 064 Flower - supplemental colour on inner side | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 070 Flower - orange colour on outer side | 070 Flower - orange colour on outer side | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 072 Flower - orange red colour on outer side | 072 Flower - orange red colour on outer side | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 073 Flower - red colour on outer side (light to medium deep tones) | 073 Flower - red colour on outer side (light to medium deep tones) | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 074 Flower - red colour on outer side (medium deep tones) | 074 Flower - red colour on outer side (medium deep tones) | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 075 Flower - red colour on outer side (deep tones) | 075 Flower - red colour on outer side (deep tones) | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 082 Flower - violet blue colour on outer side | 082 Flower - violet blue colour on outer side | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 084 Flower - blue color on outer side | 084 Flower - blue color on outer side | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 087 Flower - deepness of colour on outer side | 087 Flower - deepness of colour on outer side | 1 - very light R.H.S. - D | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 088 Flower - supplemental colour on outer side | 088 Flower - supplemental colour on outer side | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 089 Flower - arrangement of supplemental colour on outer side | 089 Flower - arrangement of supplemental colour on outer side | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 099 The ratio pistil : stamens length | 099 The ratio pistil : stamens length | 6 - pistil longer | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 100 Pistil - stigma colour | 100 Pistil - stigma colour | 2 - yellow | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 101 Pistil - uniformity of style colour | 101 Pistil - uniformity of style colour | 1 - unified | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 102 Pistil - unifed colour of style | 102 Pistil - unifed colour of style | 3 - whitish green | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 103 Pistil - double colour of style | 103 Pistil - double colour of style | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 109 Flower - time of beginning of flowering | Comparative varieties: 2. ‘Bouzov’, 3. ‘Alena’, 4. ‘Motýl’, 5. ‘Catawbiense Grandiflorum’, 7 ‘James Burchett’. Specific values (time period) valid for central Bohemian mesophyticum (Průhonice). | 5 - medium 16.5.-30.6. | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 111 Flower - fragrance | 111 Flower - fragrance | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 051 Flower - red colour on inner side (deep tones) | 051 Flower - red colour on inner side (deep tones) | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 052 Flower - red purple colour on inner side (light tones) | 052 Flower - red purple colour on inner side (light tones) | 1 - vivid purplish red, deep purplish pink R.H.S. 57 | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 054 Flower - red purple colour on inner side (deep tones) | 054 Flower - red purple colour on inner side (deep tones) | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 055 Flower - purple colour on inner side | 055 Flower - purple colour on inner side | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 056 Flower - purple violet colour on inner side | 056 Flower - purple violet colour on inner side | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 065 Flower - arrangement of supplemental colour on inner side | 065 Flower - arrangement of supplemental colour on inner side | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 066 Flower - white colour on outer side | 066 Flower - white colour on outer side | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 067 Flower - yellow colour on outer side (light tones) | 067 Flower - yellow colour on outer side (light tones) | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 068 Flower - yellow colour on outer side (deep tones) | 068 Flower - yellow colour on outer side (deep tones) | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 069 Flower - yellow orange colour on outer side | 069 Flower - yellow orange colour on outer side | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 076 Flower - red purple colour on outer side (light tones) | 076 Flower - red purple colour on outer side (light tones) | 1 - vivid purplish red, deep purplish pink R.H.S. 57 | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 078 Flower - red purple colour on outer side (deep tones) | 078 Flower - red purple colour on outer side (deep tones) | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 079 Flower - purple colour on outer side | 079 Flower - purple colour on outer side | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 080 Flower - purple violet colour on outer side | 080 Flower - purple violet colour on outer side | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 081 Flower - violet colour on outer side | 081 Flower - violet colour on outer side | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 090 Flower - presence of design | 090 Flower - presence of design | 1 - present | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 092 Flower - distinctness of design | 092 Flower - distinctness of design | 5 - intermediate | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 093 Flower - location of design | Fig. 9 | 2 - upper three lobes | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 094 Flower - type of design | Fig. 10 | 2 - linear | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 104 Stamens - number | 104 Stamens - number | 3 - low constant 5 | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 105 Stamens - colour of ripe anthers | 105 Stamens - colour of ripe anthers | 5 - brown | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 106 Stamens - colour of filaments | 106 Stamens - colour of filaments | 1 - unified | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 107 Stamens - colour of filaments unified | 107 Stamens - colour of filaments unified | 1 - white | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 108 Stamens - double colour of filaments | 108 Stamens - double colour of filaments | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 004 Plant - height | In 10 years of age | 3 - low 30- 50 (cm) | 2013 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 007 Young leaf - colour of upper side | Young leaves are observed as soon as they have reached full size | 2 - light green | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 008 Young leaf - colour of lower side | Young leaves are observed as soon as they have reached full size | 2 - light green | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 029 Flower - campanulate shape | Fig. 7 | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 030 Flower - diameter | Maximal value at open flower | 3 - small 1 - 3 (cm) | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 031 Flower - length of peduncle | 031 Flower - length of peduncle | 3 - short 0,5 - 1,5 (cm) | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 032 Flower - presence of calyx | 032 Flower - presence of calyx | 1 - present | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 033 Flower - length of the longest sepal | 033 Flower - length of the longest sepal | 3 - short < 2 (mm) | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 040 Flower - incision of corolla margin | 040 Flower - incision of corolla margin | 7 - deep > 1/2 | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 041 Flower - inner colour of base in comparison with flower colour | 041 Flower - inner colour of base in comparison with flower colour | 5 - the same | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 042 Flower - white colour on inner side | 042 Flower - white colour on inner side | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 043 Flower - yellow colour on inner side (light tones) | 043 Flower - yellow colour on inner side (light tones) | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 044 Flower - yellow colour on inner side (deep tones) | 044 Flower - yellow colour on inner side (deep tones) | 0 - absent | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |
| MORPHOLOGY | 097 Flower - colour of design (dark colours) | Type variety ‘Humboldt’. Colour observation 1 – 2 days after full bloom of the flower. | 1 - red | 2004 Research Institute of Ornamental Gardening Pruhonice | | Out of Season |