BACKGROUND OF THE INVENTION
The present invention, Hosta ‘Mourning Dove’,
relates to a new and distinct cultivar of Hosta,
botanically known as a Hosta hybrida, hereinafter
referred to as 'Mourning Dove'.
'Mourning Dove' was selected in 2002 and originated from
a controlled cross, designated 98-164, made by the
inventor in 1998 in Waseca, Minnesota. The pod parent was a
streaked variegated form of Hosta 'Mikawa-no-yuki' (not patented) and the pollen parent
was Hosta ‘Blue Jay' (not patented). The pollen
parent, 'Blue Jay’, is non-variegated. 'Mourning Dove' also differs from 'Blue Jay' in having a better growth
rate and in having longer, more wedge-shaped leaves.
Asexual reproduction of the new cultivar was first
accomplished by the inventor by division in Waseca, Minnesota. in 2003. Asexual reproduction of the new cultivar
by division and tissue culture has shown that the unique
features of 'Mourning Dove' are stable and reproduced
true to type in successive generations.
BRIEF SUMMARY OF THE INVENTION
The following traits have been repeatedly observed in
trials in Minnesota for a period of six years and
represent the characteristics of the new cultivar. These
attributes in combination distinguish 'Mourning Dove' as
a new and unique cultivar of Hosta.
1. The foliage of 'Mourning Dove' is variegated with
intense blue-green centers and yellow-green margins that
comprise about one fourth of the leaf area.
2. The leaves of 'Mourning Dove' are wedged-shaped.
3. 'Mourning Dove' is a medium sized Hosta with a
flat but mounded plant habit, reaching a height of about
30 cm (11.8 in.), exclusive of flower scapes) and a
spread of about 78 cm (30.8 in.).
4. 'Mourning Dove' blooms in early August with lavender
flowers that arise on scapes held almost horizontal to
BRIEF DESCRIPTION OF THE DRAWING
The accompanying colored photograph illustrates the
overall appearance and distinct characteristics of the
new Hosta as grown outdoors in Waseca, Minnesota. for
a period of six years. The photograph was taken in July
and is represents the summer foliage of 'Mourning Dove'.
The colors in the photograph are as close as possible
with the photographic and printing technology utilized
and combined with the color values cited in the DETAILED BOTANICAL DESCRIPTION accurately describe the colors of
the new Hosta.
DETAILED BOTANICAL DESCRIPTION OF THE PLANT
The following is a detailed description of six year-old
plants of the new cultivar as grown outdoors in Waseca, Minnesota. The phenotype of the new cultivar may vary with
variations in environmental, climatic, and cultural
conditions, as it has not been tested under all possible
environmental conditions. The color determination is in
accordance with the 2001 The
Royal Horticultural Society Colour Chart, London, England, except
where general color terms of ordinary dictionary
significance are used.
+ Botanical Classification: 'Mourning Dove' is a cultivar
of Hosta hybrida.
+ Parentage: Pod parent; streaked form of Hosta 'Mikawa-no-yuki' (not patented), pollen parent Hosta
‘Blue Jay' (not patented).
+ General description:
Blooming period: Typically
August 1st to August 20th in
Plant habit: Herbaceous
perennial, clump-forming, flat mounded habit.
Height and spread: Reaches
about 30 cm (11.8 in.) in height (excluding flower scapes)
and about 78 cm (30.8 in.) in width.
Zones 3 to 8.
to full shade, moist soils of moderate fertility.
Diseases and pests: No
susptibility or resistance to diseases or other pests
has been observed for 'Mourning Dove'.
Root description: Freely
Propagation: In vitro
propagation is the preferred method utilizing typical
methods for Hosta, division is also possible.
Root development: Rooted
transplants from tissue culture fully develop in a
96-cell liner in about 6 to 8 weeks in a greenhouse with
average temperatures of about 70° F.
Growth rate: Moderate.
+ Foliage description:
Leaf shape: Broadly
Leaf division: Simple.
Leaf base: Rounded.
Leaf apex: Acuminate.
Leaf venation: About
8 pairs of veins, campylodrome pattern, impressed on
upper surface and raised on lower surface, color on
upper surface 145A, color matches foliage coloration on
Leaf margins: Entire.
Leaf attachment: Petiolate.
Leaf arrangement: Basal,
radiate spirally from base.
Leaf surface: Glaucous
on upper and lower surface in spring, glabrous on upper
surface and glaucous on lower surface on summer foliage,
lower surface on both spring and summer foliage is
Leaf substance: Average.
Leaf orientation: Held
nearly upright on petioles that are upright or up to
about a 45° angle to center.
Leaf variegation pattern: Margins
comprise about one quarter of the leaf area and average
about 1.2 cm (0.5 in.) in width, the centers are primarily
lanceolate in shape, intermediate areas exists in an
irregular pattern between the boundaries of the margins
and centers on the summer foliage, they are not
conspicuous. The variegation is more distinct on summer
Leaf color: Spring
foliage, upper surface; centers 137A (slightly darker)
overlaid with glaucous coating, margins 138A overlaid
with glaucous coating, lower surface; centers and
margins 191A with coating of 191D. Summer foliage, upper
surface; centers 137A (slightly darker), margins 151B TO
151D, intermediate areas 191A, lower surface; centers
137B with a glaucous coating of 189C, margins 144A with
glaucous coating of 191B, intermediate area not
Leaf size: Average
of 19.7 cm (2.8 in.) in length, average of 9.5 cm (3.7 in.) in width.
Leaf quantity: About
5 to 7 per shoot (eye).
Petiole size: About
20 cm (7.9 in.) in length, average 0.5 mm in width.
Petiole color: Inner
surface 138A at margins to 138B in centers, outer
surface 138A in margins, 193A in centers.
Petiole surface: Glabrous,
Petiole shape: Sulcate.
+ Flower scape description:
Scape shape: Round,
Scape number: One
per mature eye under normal growing conditions.
Scape posture: Held
Scape size: About
40 to 50 cm (19.6 in.) in length, about 4 mm in width.
Scape color: 144B.
Scape surface: Slightly
Leaf bracts: About
3, about 2.7 cm (2.8 in.) in length and 1.0 cm (0.4 in.) in width, papery,
lanceolate in shape, 158C in color blushed and thin
lines of N77C.
+ Flower description:
Inflorescence type: Terminal
racemes of single tubular-shaped flowers, clustered near
terminus of scape.
Lastingness of Inflorescence: About
3 weeks from first opening bloom to fading of last
opening bloom, individual blooms last about one day.
Flower shape: Tubular.
Flower number: About
Flower internode length: Up
to about 1.0 cm (0.4 in.), upper flowers are congested in cluster.
Flower fragrance: None
Flower bud shape: Spathulate.
Flower bud size: Up
to about 3.5 cm (1.4 in.) in length and 1.0 cm (0.4 in.) in diameter.
Flower bud color: Emerges
155B with lines of N77C, matures to 84D prior to
Flower size: Up
to about 5 cm (2 in.) in length and about 1.5 cm (0.6 in.) in diameter.
Flower color: Opens
84D, matures to 85B to 85C.
4 mm in length and 2 mm in diameter, 84D in color.
Perianth features: Comprised
of 6 tepals, 3 interior and 3 exterior, fused in tube
region and about one half of expanded region than
overlapping towards apex.
Tepal shape: Lanceolate.
Tepal size: About
3.5 cm (1.4 in.) in length, about 5 mm in width.
Tepal color: Outer
and inner surface 84D with blush and fine lines of 85B.
Tepal texture: Glabrous.
Floral bracts: 1
per flower, lanceolate in shape, papery, 158C in color
blushed and thin lines of N77C, about 2.2 cm (0.9 in.) in length
and 7 mm in width.
Pistil. Style is about 4.0 cm (1.6 in.) in length, 1 mm in width and
150C in color. Stigma is 3-lobed, 150C in color and 0.75
mm in diameter. Ovary is superior, compound, composed of
3 locules, oblong in shape, 5 mm in length, 2 mm in
width and 144C in color.
stamens, filament is 150C in color, about 4.0 cm (1.6 in.) in
length, 0.7 mm in width, length about equal with
perianth, anthers are 3.5 mm in length, 1 mm in width,
attachment is versatile, 202A in color, dehiscence is
longitudinal, pollen is abundant and 14A in color.
3-chambered, about 2.2 cm (0.9 in.) in length, 5 mm in width, 138A
10 seeds per capsule, about 8 mm in length and 3 mm in
width, 202A in color.