<i>Euphorbia </i>plant named ‘BONPRI 1762’

Abstract

A new and distinct cultivar of Euphorbia plant named BONPRI 1762, characterized by its relatively compact, upright and mounded plant habit; vigorous growth habit; freely branching habit; inflorescences with bright red-colored flower bracts; and good post-production longevity.

Claims

1. A new and distinct Euphorbia plant named BONPRI 1762 as herein illustrated and described.

Description

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

(1) The accompanying photographs illustrate the overall appearance of the new Euphorbia plant showing the colors as true as it is reasonably possible to obtain in colored reproductions of this type. Colors in the photographs may differ slightly from the color values cited in the detailed botanical description which accurately describe the colors of the new Euphorbia plant.

(2) The photograph on the first sheet (FIG. 1) is a side perspective view of a typical flowering plant of BONPRI 1762 grown in a container.

(3) The photograph on the second sheet (FIG. 2) is a close-up view of a typical flowering plant of BONPRI 1762.

DETAILED BOTANICAL DESCRIPTION

(4) Plants used in the aforementioned photographs and described herewith in detail were grown during the autumn and early winter in 10.5-cm containers in an outdoor nursery in Higashiomi, Shiga, Japan and under cultural practices typical of commercial Euphorbia production. During the production of the plants, day temperatures averaged 23 C. and night temperatures averaged 13 C. Plants were six months old when the photographs and the description were taken. In the following description, color references are made to The Royal Horticultural Society Colour Chart, 2015 Edition, except where general terms of ordinary dictionary significance are used. Botanical classification: Euphorbia pulcherrima Willd. ex Klotzsch X Euphorbia cornastra BONPRI 1762. Parentage: Naturally-occurring whole plant mutation of a proprietary selection of Euphorbia pulcherrima Willd. ex Klotzsch X Euphorbia cornastra identified as code number 15-16, not patented. Propagation: Type.Terminal vegetative cuttings. Time to initiate roots, summer.About ten days at temperatures about 20 C. to 21 C. Time to initiate roots, winter.About twelve days at temperatures about 20 C. to 21 C. Time to produce a rooted young plant, summer.About 24 days at temperatures about 20 C. to 21 C. Time to produce a rooted young plant, winter.About 28 days at temperatures about 20 C. to 21 C. Root description.Fibrous; typically white in color, actual color of the roots is dependent on substrate composition, water quality, fertilizers, substrate temperature and physiological age of roots. Rooting habit.Freely branching; medium density. Plant description: Plant habit and form.Relatively compact, upright and mounded plant habit; inverted triangle; inflorescences positioned above the foliar plane; vigorous growth habit. Plant height.About 19 cm. Plant diameter or spread.About 26 cm. Lateral branch description.Branching habit: Freely branching habit, about five to six lateral branches develop per plant. Length: About 10.8 cm. Diameter: About 3.5 mm. Internode length: About 1.2 cm. Aspect: Mostly upright to slightly outwardly. Strength: Moderately strong. Texture: Smooth, glabrous. Color: Close to 144A. Leaf description.Arrangement: Alternate, simple. Length: About 6.8 cm. Width: About 4.7 cm. Shape: Lanceolate. Apex: Acute. Base: Rounded. Margin: Mostly entire, occasionally with few shallow lobes; undulate. Venation pattern: Pinnate, reticulate. Texture, upper surface: Smooth, glabrous. Texture, lower surface: Rough, glabrous. Color: Developing leaves, upper surface: Close to 139A. Developing leaves, lower surface: Close to 137B. Fully developed leaves, upper surface: Close to 139A; venation, close to 143A. Developing and fully developed leaves, lower surface: Close to NN137B; venation, close to 143C. Petioles.Length: About 1.6 cm. Diameter: About 1.6 mm. Texture, upper and lower surfaces: Smooth, glabrous. Color, upper and lower surfaces: Close to 144A. Inflorescence description: Inflorescence type and habit.Inflorescences are compound corymbs of cyathia with numerous flower bracts subtending the cyathia; inflorescences positioned above the foliar plane. Quantity of inflorescences.One per lateral branch, about five to six inflorescences develop per plant. Inflorescence diameter.About 15.8 cm. Inflorescence height.About 4.8 cm. Fragrance.None detected. Natural flowering season.Plants typically flower during the autumn and winter in Japan; inflorescence initiation and development can also be induced under artificial long nyctoperiod and short photoperiod conditions; early flowering response, plants flower about 49 to 50 days under natural season or photoinductive conditions in Japan. Post-production longevity.Good post-production longevity; plants of the new Euphorbia maintain good substance and bract color for about six to eight weeks. Flower bracts.Quantity per inflorescence: About 16. Length, largest bracts: About 6.5 cm. Width, largest bracts: About 2.6 cm. Aspect: Mostly horizontal and flat. Shape: Elliptic. Apex: Acute. Base: Obtuse. Margin: Entire. Texture and luster, upper and lower surfaces: Smooth, glabrous; matte. Venation pattern: Pinnate, reticulate. Color: Transitional bracts, upper surface: Random sectors, close to 202A and 45C. Transitional bracts, lower surface: Random sectors, close to 147B and 64C. Developing bracts, upper surface: Close to 46B. Developing bracts, lower surface: Close to 45C. Fully expanded bracts, upper surface: Close to 45B; venation, close to 45A; flower bracts resist fading with subsequent development. Fully expanded bracts, lower surface: Close to 47B; venation, close to 50C; flower bracts resist fading with subsequent development. Flower bract petioles: Length: About 6 mm. Diameter: About 1.2 mm. Texture, upper and lower surfaces: Smooth, glabrous. Color, upper and lower surfaces: Close to N45C. Cyathia.Quantity per corymb: About 14. Diameter of cyathia cluster: About 2.7 cm. Height, individual cyathium: About 4.8 mm. Diameter, individual cyathium: About 5.3 mm. Shape, individual cyathium: Globose. Color: Distally, close to 187A, and proximally, close to 142B. Nectaries: Quantity per cyathium: About eight. Size: About 2.1 mm by 3.3 mm. Texture: Smooth, glabrous. Color: Close to 45C. Peduncles.Length: About 2.2 mm. Diameter: About 1.8 mm. Texture, upper and lower surfaces: Smooth, glabrous. Aspect: Mostly upright. Color, upper and lower surfaces: Close to 142B. Reproductive organs.To date, stamen and pistil development have not been observed on plants of the new Euphorbia. Seeds and fruits.To date, seed and fruit development have not been observed on plants of the new Euphorbia. Pathogen & pest resistance: To date, plants of the new Euphorbia have not been shown to be resistant to pathogens and pests common to Euphorbia plants. Temperature tolerance: Plants of the new Euphorbia have been observed to tolerate temperatures ranging from about 8 C. to about 40 C.