Denomination: 'Robmornyel'
Trade name: Morning Glow Yellow
Botanical Name: Lantana camara
Applicant/Holder: Roberson, Robert J.
31706 East Pink Hill Road
Grain Valley, Missouri
United States of America
Breeder: Robert J. Roberson, Grain Valley, United States of America
Agent in Canada: Variety Rights Management
475 County Road 18
R.R. #2
Oxford Station, Ontario
K0G 1T0
Tel: 613-258-9015
Application Date: 2000-06-21
Application Number: 00-2299
Date abandoned: 2007-12-10

Variety Description

Variety used for comparison: 'Patriot Firewagon'

Summary: 'Robmornyel' has darker green leaves than 'Patriot Firewagon'. The inflorescence of 'Robmornyel' is smaller in diameter than that of 'Patriot Firewagon'. The floret colour for 'Robmornyel' is yellow upon opening and matures to lighter yellow, while for 'Patriot Firewagon', it is yellow orange and orange upon opening and matures to red.


'Robmornyel' is a Lantana variety with a semi-erect plant growth habit. Pubescence of the stem is sparse. The leaf blade is elliptic to ovate in shape with an acute apex, acute base and serrate margin. The colour of the leaf blade is dark green. Pubescence of the leaf blade is sparse on both the upper and lower sides. There is a petiole present.

'Robmornyel' has dome shaped inflorescences which are located at both axillary and terminal positions on the stem. The arrangement of the corolla lobes is overlapping. The corolla lobes have an obtuse shaped apex and weak to moderate undulation of the margin. The corolla lobes are recurved along the longitudinal axis. The floret colour for 'Robmornyel' is yellow upon opening and matures to lighter yellow. The florets have no eye zone.

Origin & Breeding History: 'Robmornyel' was developed from a Lantana camara L. breeding / selection program conducted in the 1990's by Robert Roberson in Grain Valley, Missouri, U.S.A. The goal for this breeding / selection program was to produce varieties with new colour breaks, new growth habits and / or growth characteristics superior to existing cultivars in the market. A semi-controlled open pollination of 'Mellow Yellow' was allowed to occur in 1995 and 'Robmornyel' was selected from the resulting seedling population.

Tests & Trials: The test and trial for 'Robmornyel' was conducted in a polyhouse during the summer of 2005 at Variety Rights Management in Oxford Station, Ontario. The trial included 10 plants of each variety. The plants were grown in 15 cm pots spaced 20 cm apart. 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 'Robmornyel' with reference variety 'Patriot Firewagon'

Inflorescence diameter (cm)

  'Robmornyel' 'Patriot Firewagon'
mean 3.49 4.95
std. deviation 0.23 0.19

Floret colour (RHS)

  'Robmornyel' 'Patriot Firewagon'
upon opening 12B 17A/B changing to 23A/24A
at maturity 12C 33A

Click on image for larger view
Lantana: 'Robmornyel' (left) with reference variety 'Patriot Firewagon' (right)

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