Denomination: 'Balriowite'
Trade name: Rio White
Botanical Name: Portulaca oleracea
Applicant/Holder: Ball Horticultural Company
622 Town Road
West Chicago, Illinois
United States of America
Breeder: Ball Horticultural Company, West Chicago, United States of America
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-631-6241
Application Date: 2005-02-18
Application Number: 05-4601
Grant of Rights Date: 2007-09-25
Certificate Number: 2939
Date rights surrendered: 2009-11-23

Variety Description

Variety used for comparison: 'Summer Joy White' (Yubi Summer Joy White)

Summary: 'Balriowite' differs from the reference variety, 'Summer Joy White' mainly in internode length, flower diameter and arrangement of corolla lobes. The internodes of 'Balriowite' are shorter than those of 'Summer Joy White'. The flower diameter of 'Balriowite' is smaller than that of 'Summer Joy White'. The corolla lobes of 'Balriowite' are overlapping whereas those of 'Summer Joy White' are free to touching.


PLANT: annual, spreading growth habit, dense branching, medium to thick shoots, light green shoots with no anthocyanin colouration on shoot.

LEAF: alternate arrangement of simple leaves, elliptic and obovate with an acute and obtuse apex, cuneate base, medium green upper and lower surfaces with no anthocyanin colouration, petiole absent

CALYX: opposite arrangement, two sepals, ovate
FLOWER: inflorescence type, one to two open flowers, terminal location, concave in profile
COROLLA LOBES: overlapping, margins very weak fringe, retuse at tip, weak to medium undulation of margins, weak reflexing of margins
STAMEN: light green filament, orange anther
PISTIL: cream style, white stigma

Origin & Breeding History: 'Balriowite' arose through self-pollination of the variety, 'Wild Fire White' in January 2002 at Dulce Nombre de Cartago, Costa Rica. The objective of the breeding program was to develop a series of proprietary portulaca varieties unique in its characteristics from other portulaca varieties. Initial selection and reproduction by vegetative cuttings first began in June, 2002.

Tests & Trials: The tests and trials for 'Balriowite' were conducted in a polyhouse at BioFlora Inc. in St. Thomas, Ontario during the spring of 2006. The trial included a total of 15 plants of both the candidate and reference varieties. All plants were grown from rooted cuttings and transplanted into 6 inch pots on April 26, 2006. Observations and measurements were taken from 10 plants of each variety on July 13, 2006. All colour measurements were determined using the 2001 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Balriowite' with reference variety 'Summer Joy White'

Flowering shoot: length (cm)

  'Balriowite' 'Summer Joy White'
mean 32.7 25.0
std. deviation 4.98 3.99

Internode: length (cm)

  'Balriowite' 'Summer Joy White'
mean 1.3 2.2
std. deviation 0.28 0.29

Sepal: length (mm)

  'Balriowite' 'Summer Joy White'
mean 6.6 8.5
std. deviation 0.84 0.85

Sepal: width (mm)

  'Balriowite' 'Summer Joy White'
mean 7.1 8.6
std. deviation 0.74 0.52

Flower: diameter (cm)

  'Balriowite' 'Summer Joy White'
mean 3.6 5.0
std. deviation 0.23 0.46

Colour of upper surface of corolla lobe (RHS)

  'Balriowite' 'Summer Joy White'
main white white
secondary 193B at base 157A at base

Colour of lower surface of corolla lobe (RHS)

  'Balriowite' 'Summer Joy White'
main white white

Click on image for larger view
Portulaca/purslane: 'Balriowite' (left) with reference variety 'Summer Joy White' (right)

Date modified: