RP5

Coreopsis

Denomination: 'RP5'
Previously Proposed Denomination: 'RP#5'
Botanical Name: Coreopsis
Applicant/Holder: The Ivy Farm
P.O. Box 116
22511 Rose Cottage Road
Locustville, Virginia
23404
United States of America
Breeder: Harini Korlipara, Terra Nova Nurseries, Inc., Canby, United States of America
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Canada
Tel: 519-631-6241
Application Date: 2007-03-28
Application Number: 07-5804
Grant of Rights Date: 2008-08-29
Certificate Number: 3341
Date rights surrendered: 2013-09-24

Variety Description

Varieties used for comparison: 'Rum Punch' and 'RP4'

Summary: The variety 'RP5' has a more bushy plant growth habit but shorter leaf blades than the variety 'RP4'. The main difference between 'RP5' and both references 'RP4' and 'Rum Punch' is flower colour. The flower heads of 'RP5' are also smaller in diameter than the flower heads of 'Rum Punch'.

Description:

PLANT: upright bushy habit, dense branching
STEM: dark green, absent or very weak anthocyanin colouration, absent or very sparse pubescence, very thin, smooth

LEAF BLADE: linear, acute apex, attenuate base, entire margin, absent or very sparse pubescence, very weak glaucosity, medium green upper side, medium green lower side, no petiole

PEDUNCLE: absent or very weak anthocyanin colouration, absent or very sparse pubescence
FLOWER HEAD: erect, small diameter, few ray florets (8)
RAY FLORET: open to touching, weak to medium reflexing, obovate, three lobed apex, weakly recurved tip, orange brown with brown red overlay, yellow at base
DISC: present

Origin & Breeding History: The variety 'RP5' is the product of a planned breeding program developed by the breeder in Canby, Oregon. The new variety originated as a whole plant tissue-culture mutation of the Coreopsis variety 'Rum Punch'. The mutation was discovered by the breeder in February, 2006. The new variety 'RP5' was selected based on its low, mounding habit, excellent vigour and unique, rusty orange, daisy-like flowers.

Tests & Trials: Trials for 'RP5' were conducted in a polyhouse during the summer of 2007 at St. Thomas, Ontario. The trial included 15 plants of the candidate and reference varieties. All plants were grown from rooted cuttings planted into 6.4 cm pots and transplanted into 11.4 cm pots on May 28, 2007. Observations and measurements were taken from 10 plants of each variety on August 14, 2007. All colour determinations were made using the 2001 Royal Horticultural Society (RHS) Colour Chart.


Comparison tables for 'RP5' with reference varieties 'Rum Punch' and 'RP4'

Leaf blade length (cm)

  'RP5' 'Rum Punch' 'RP4'
mean 3.7 3.6 5.0
std. deviation 0.48 0.26 0.42

Diameter of flower head (cm)

  'RP5' 'Rum Punch' 'RP4'
mean 2.8 3.7 3.3
std. deviation 0.27 0.22 0.27

Colour of upper side of ray floret (RHS)

  'RP5' 'Rum Punch' 'RP4'
newly open N163B and 180B/179B (12A/14B at base) 163B/14B with streaks of 60B 3A
fully open 163B and 167A (12A at base) 163B/14B with streaks of 60B 3A with 179A/180B

Colour of lower side of ray floret (RHS)

  'RP5' 'Rum Punch' 'RP4'
fully open 164C with streaks of 182D 161B with streaks of 170C 5C-D with 180D at apex

Click on image for larger view
RP5
Coreopsis: 'RP5' (left) with reference varieties 'Rum Punch' (centre) and 'RP4' (right)

Click on image for larger view
RP5
Coreopsis: 'RP5' (left) with reference varieties 'Rum Punch' (centre) and 'RP4' (right)

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