Denomination: 'Arosa'
Botanical Name: Medinilla
Applicant/Holder: Corn. Bak B.V.
Dorpsstraat 11-B
NL-1566 AA
Breeder: Elly Bak, Corn. Bak B.V., Assendelft, Netherlands
Nicolaas David Maria Steur, Corn. Bak B.V., Netherlands
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-631-6241
Application Date: 2014-08-08
Application Number: 14-8426
Grant of Rights Date: 2016-02-19
Certificate Number: 5194
Grant of Rights Termination Date: 2036-02-19

Variety Description


PLANT: lignified shrub
STEM: dark green, lignified parts are medium brown, winged

LEAF: decussate arrangement along stem, two per whorl
PETIOLE: absent
LEAF BLADE: brown green (darker than RHS N137A) with lighter green veins on upper side, brown green (RHS 146B) on lower side, sunken veins, light green veins on lower side, elliptic shape, concave in cross-section, straight along longitudinal axis, weakly undulated margin, acuminate tip

INFLORESCENCE: hanging panicle type, two bracts per whorl, 80 to 100 flowers in biggest panicle
PEDUNCLE: light green (RHS 144B) with red distal part, square shape in cross-section
BRACT: light green (RHS 144C), ovate shape, concave in cross-section, entire margin, narrow acute tip
PEDICEL: purple red (RHS 58D), round shape in cross-section
SECONDARY PEDICEL: violet (RHS 75B), round shape in cross-section
FLOWER: mean of 15 mm in diameter
CALYX: coalescent type, ovary enclosing, violet (RHS 75B), no lobes
COROLLA: four to five petals, fleshy type, arrangement is not touching
PETAL: light blue violet (RHS 76B), obovate shape, asymmetrical, concave in cross-section, weakly incurved to straight along longitudinal axis, entire margin, rounded tip
STAMEN: white, incurved along longitudinal axis
ANTHER: yellow, elongated with hair-like violet threads
STYLE: white, incurved along longitudinal axis
OVARY: superior placement, light green, round shape, flattened tip

Origin & Breeding History: 'Arosa' was bred and developed by the breeders, Elly Bak and Nicolaas D.M. Steur, both employees of Corn. Bak B.V. in Assendelft, Netherlands. It originated from a controlled cross conducted in 2009 in Assendelft between two numbered proprietary selections. 'Arosa' was selected in 2011 based on its medium plant size and excellent flower longevity. Asexual reproduction of 'Arosa' by cuttings was first conducted in 2012 in Assendelft, Netherlands.

Tests & Trials: The detailed description of 'Arosa' is based on the UPOV report of Technical Examination, application number 2013/2779, purchased from the Community Plant Variety Office in Angers, France. The trials were conducted by Naktuinbouw in Roelofarendsveen, Netherlands, in 2014. Colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

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Medinilla: 'Arosa'

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