Pear tree named ‘Olsen Bosc’

Abstract

The Olsen Bosc pear tree, a mutation of Bosc, is notable for its distinctive fruit. Profound russeting on substantially the entire surface of the skin gives Olsen Bosc pears a distinctive bronze appearance.

Claims

1. A new and distinct pear tree substantially as described and illustrated herein.

Description

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

(1) FIG. 1 is a photograph of a nine-year-old Olsen Bosc tree taken in March 2018 near Zillah, Wash.;

(2) FIG. 2 is a photograph of fruit of Olsen Bosc; and,

(3) FIG. 3 is a photograph of standard Bosc (left), Golden Russet Bosc (center), and Olsen Bosc (right) pears.

DETAILED BOTANICAL DESCRIPTION OF THE VARIETY

(4) The following-detailed botanical description is based on observations made near Zillah, Wash. during the 2015 growing season (unless otherwise noted). The described trees were six years old, grown on Old Home x Farmingdale 97 rootstock (not patented). All colors are described according to the Munsell Book of Color. It should be understood that the characteristics described will vary somewhat depending upon cultural practices and climatic conditions, and will vary with location and season. Quantified measurements are expressed as an average of measurements taken from a number of individual plants of the new variety. The measurements of any individual plant or any group of plants of the new variety may vary from the stated average. Tree: Vigor.Highly vigorous, similar to Bosc. Habit.Upright to spreading. Height.About 3.6 m to 5.5 m. Spread.About 3.0 m. Trunk diameter (at 30 cm above the graft).16 cm. Bark texture.Rough. Bark color.Gray 7.5 Y 7/2. Winter hardiness.Similar to Bosc. Branch (fruiting branches located at around 1 m above the graft union): Length.2.8 m. Diameter.7 cm to 11 cm. Crotch angle.90. Bark color.Gray 7.5 Y 7/2. One year old shoot: Length.18 cm to 50 cm. Color.Medium brown 7.5YR 4/4. Pubescence.None, glabrous. Thickness.8 mm to 12 mm. Internode length.4 cm to 7 cm. Pubescence.None, glabrous. Number of lenticels.4 to 10 per cm.sup.2. Vegetative bud shape.Broad ovoid, typical of Bosc. Vegetative bud color.Dark brown 7.5 YR 3/4. Position of vegetative buds in relation to shoot.Approximately 45, typical of Bosc. Flower buds: Quantity per spur.2 to 4. Shape.Broad ovoid. Length.8 mm to 10 mm. Diameter.4 mm to 6 mm. Color.Light brown 7.5 YR 4/2. Flowers: Diameter of fully open flower.30 mm to 40 mm. Depth of open flower.10 mm. Relative position of petal margin.Usually not touching, sometimes touching at base. Number per cluster.6 to 10. Date of first bloom.Mar. 23, 2015; Apr. 2, 2016. Date of full bloom.Mar. 28, 2015; Apr. 7, 2016. Pollination requirement.Pollinator required, similar to Bosc. Petals: Number per flower.5. Shape.Elongated. Length.18 mm to 20 mm. Width.10 mm. Margin.Smooth. Color of upper surface.White. Color of lower surface.White. Pistils: Length.6 mm to 8 mm. Color.Yellow white 7.5 Y 9/2. Stigma: Length.6 mm. Color.Yellow white 7.5 Y 9/2. Style: Length.10 mm. Color.Yellow white 7.5 Y 9/2. Ovary: Size.4 mm. Color.Light green 7.5 Y 6/6. Anthers: Quantity.16 to 20 per flower. Length.1.5 mm. Presence of pollen.Present. Color of pollen.Yellow 7.5 Y 8.5/12. Pedicel: Length.18 mm to 20 mm. Diameter.2 mm. Color.Light green 2.5 GY 7/6. Sepals: Quantity.5 per flower. Length.5 mm. Width.2 mm. Shape.Ranging from linearly lanceolate to lanceolate with a wide base. Apex.Slightly indented. Margin.Smooth. Attitude in relation to corolla.Spreading. Leaves: Shape.Ovate. Length.7 cm to 10 cm. Width.2 cm to 8 cm. Length/width ratio.Ranging from 1:1 to 3:1. Blade margin.Entire. Apex.Acute to accuminate. Base.Generally rounded; cuneate to obtuse. Color of upper surface.Dark green 10GY 3/4. Color of lower surface.Light green 10 GY 5/4. Attitude in relation to shoot.30 to 60. Curvature of longitudinal axis.Downward, from 90 to 180 from the vertical shoot. Petiole: Length.2.5 cm to 3.5 cm. Diameter.2 mm. Petiole color.Yellowish green 2.5 GY 8/6. Stipule color.Yellowish green 2.5 GY 8/6. Stipule shape.Spinose. Stipule length.8 mm to 13 mm. Stipule width.0.5 mm. Stipule apex.Sharply pointed. Fruit: Quantity per cluster.2 to 4. Height.9.5 cm to 11 cm; average 10.2. Width.6.5 cm to 7.8 cm; average 7.0 cm. Ratio of height to width.10:7. Weight.216 g; similar to Golden Russet Bosc. General shape in profile.Pyriform; less elongated than Golden Russet Bosc. Position of maximum diameter.Lower third. Symmetry in longitudinal section.Asymetrical; more pronounced than Golden Russet Bosc. Profile of sides.Concave. Skin texture.Russeted and dull. Background color of skin.Yellowish brown 7.5 YR 7/10. Area of over color of skin.95% to 100%. Intensity of over color of skin.Intense. Color of overcolor.Reddish brown 7.5 YR 5/6. Relative area of russet around eye basin.90% to 100%. Relative area of russet on cheeks.95% to 100%. Relative area of russet on stalk attachment.100%. Length of stalk.3 cm to 4 cm; average 3.4 cm. Diameter of stalk.2.5 mm to 3 mm. Curvature of stalk.Somewhat curved, typical of Bosc. Attitude of stalk in relation to axis of fruit.Somewhat off-center, typical of Bosc. Stalk color.Dark brown 7.5 YR 3/4. Depth of eye basin.4 mm. Width of eye basin.17 mm. Firmness of flesh.17 to 22; average 19 lbs. pressure. Flesh texture.Crisp and fine-grained. Aroma.Aromatic. Juiciness.Medium to juicy. Brix.16 Brix. Flesh color.Cream 7.5 Y 9/4, transluscent. Seeds: Quantity per fruit.7. Shape.Obovate. Length.7 mm. Width.5 mm. Color.Dark brown 7.5 Y 2/2. Harvest: Time for harvest.Sep. 2, 2015; Aug. 29, 2016. Time of maturity for consumption.5 to 10 days after harvest. Amount of fruit produced per 200 trees.12,100 lbs. (2014), 11,000 lbs. (2015), 16,500 lbs. (2016). Disease resistance/susceptibility: Similar to Bosc. Market use: Fresh, dessert. Storage characteristics: Excellent.