Euphorbia milii plant named ‘Helena’

Details Euphorbia milii plant named ‘Helena’ Euphorbia milii plant named ‘Helena’

2004-01-23

2004-12-21

Campell, Bruce R. (Department: 1661)

Plants

Herbaceous ornamnental flowering plant

Euphorbia

Plant Patent

active

PP015446

ABSTRACT:

Genus and species of the plant claimed:
Euphorbia milli
Desmoul.
Variety denomination: ‘Helena’.
BACKGROUND OF THE INVENTION
The present invention relates to a new and distinct cultivar of
Euphorbia milii
plant, botanically known as
Euphorbia milii
Desmoul. commonly known as Crown of Thorns, and hereinafter referred to by the name ‘Helena’.
The new
Euphorbia milii
is a product of a planned breeding program conducted by Jørgen Nielsen in Haarslev, Fyn, Denmark. The new
Euphorbia milii
originated from a cross made in 2001 by the Inventor, Steen Thomsen. The male parent is an unnamed seedling of
Euphorbia milii
Desmoul. and female parent is an unnamed seedling of
Euphorbia lophogona.
The Inventor selected the new
Euphorbia milii
cultivar from as a single plant the progeny of the above cross in 2001 on the basis of its flower color and compact, freely branching habit. Plants of the new
Euphorbia milii
are upright, compact and have a unique color and abundant small sized flowers.
Asexual reproduction of the new cultivar by terminal cuttings taken and propagated and trial production batches at Hjortebjerg Nurseries, Denmark, has shown that the unique features of this new
Euphorbia milii
are stable and reproduced true to type in many successive generations of asexual reproduction.
BRIEF DESCRIPTION OF THE INVENTION
Plants of the cultivar ‘Helena’ have not been observed under all possible environmental conditions. The phenotype may vary somewhat with variations in environment such as temperature, light intensity, day length, and fertility level without, however, any variance in genotype.
The following traits have been repeatedly observed and are determined to be the unique characteristics of ‘Helena’. These characteristics in combination distinguish ‘Helena’ as a new and distinct cultivar:
1. White floral bracts 155A, light green tips 145A;
2. Very dense and bushy plant form;
3. Vigorous growth habit; compact plant habit
4. Small flowers on long thin peduncles;
5. Few and small thorns.
Plants of the cultivar ‘Helena’ can be compared to plants of the cultivar
Euphorbia milii.
‘Themis’ (unpatented). Side-by-side comparisons by the Inventor in Haarslev, Denmark, of the cultivar ‘Helena’ and the cultivar ‘Themis’ have shown the plants differ in the following characteristics:
1. Plants of the new
Euphorbia milii
have striking white bracts and staminate cyathia with yellow orange glands.
2. Plants of the new
Euphorbia milii
have darker dark green leaves than ‘Themis’.
3. Plants of the new
Euphorbia milii
have longer and more upright peduncles than plants of the cultivar ‘Themis’.
4. Plants of the new
Euphorbia milii
are smaller than the plants of the cultivar ‘Themis’.
5. Plants of the new
Euphorbia milii
have more flowers per plant than the plants of the cultivar ‘Themis’.


REFERENCES:
UPOV ROM GTITM Computer database 2004/02 GTI Jove retrieval software.

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