Denomination: 'Diastu'
Trade name: Flying Colors Antique Rose
Botanical Name: Diascia barberae
Applicant/Holder: Syngenta Crop Protection AG
Schwarzwaldallee 215
Breeder: Henricus G.W. Stemkens, Syngenta Seeds B.V., Enkhuizen, Netherlands
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-631-6241
Application Date: 2003-01-09
Application Number: 03-3441
Grant of Rights Date: 2004-12-15
Certificate Number: 2056
Date rights surrendered: 2014-10-29

Variety Description

Variety used for comparison: 'Heccharm' (Little Charmer)

Summary: 'Diastu' is a broader plant with larger leaves and smaller corollas than 'Heccharm'.


'Diastu' is an annual twin spur variety with upright to prostrate growth habit and dense branching. The thin to medium thick stems are medium green in colour with no anthocyanin colouration. The medium green leaf blades are ovate to cordate in shape and the margins of the leaf blades are serrate. Anthocyanin colouration of the leaf blades is absent. Glossiness on the upper surface of the leaf blade is weak to moderate.

'Diastu' flowers almost continuously. Flower colour is blue pink on the inner and outer sides. The spurs are purple red in colour and there is a yellow spot present in the throat of the corolla.

Origin & Breeding History: 'Diastu' originated from a cross between the female parent 'A 64-1', a Diascia with coral flower colour and intermediate flower size, and the male parent 'A 65-1', a Diascia with lilac pink flower colour and small flower size. The cross took place in Enkhuizen, The Netherlands in 1998. Selection criteria was based on flowering time and compact growth habit.

Tests & Trials: Tests and trials for 'Diastu' were conducted in a greenhouse during the summer of 2003 at BioFlora Inc. in St. Thomas, Ontario. The trial consisted of 15 plants per variety grown from unrooted cuttings, rooted at week 22 and transplanted into 11cm pots at week 28. All colour characteristics were determined using the 2001 Royal Horticultural Society (RHS) colour chart and measured characteristics were based on ten plant measurements.

Comparison tables for 'Diastu' with reference variety 'Heccharm'

Plant width (cm)

  'Diastu' 'Heccharm'
mean 50.85 35.45
std. deviation 5.578 2.544

Leaf length (cm)

  'Diastu' 'Heccharm'
mean 2.51 2.04
std. deviation 0.119 0.135

Leaf width (cm)

  'Diastu' 'Heccharm'
mean 2.24 1.43
std. deviation 0.221 0.164

Corolla length (cm)

  'Diastu' 'Heccharm'
mean 2.11 2.29
std. deviation 0.120 0.074

Corolla width (cm)

  'Diastu' 'Heccharm'
mean 2.09 2.20
std. deviation 0.137 0.105

Colour of corolla (RHS)

  'Diastu' 'Heccharm'
inner side 68B 68A-B
outer side 73B, N66D 73B with 68B margins

Colour of spurs (RHS)

  'Diastu' 'Heccharm'
colour 60C, 59D paler than 63B

Colour of spot in corolla throat (RHS)

  'Diastu' 'Heccharm'
colour 4A 4A
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