BACKGROUND OF THE INVENTION
The present invention, Hosta ‘Cathedral Windows’,
relates to a new and distinct cultivar of Hosta,
botanically known as a Hosta hybrida, hereinafter
referred to as 'Cathedral Windows'.
'Cathedral Windows' originated as a chemically induced
mutation of Hosta ‘Stained Glass' in 2000 in
Asexual reproduction of the new cultivar was first
accomplished by the inventor by division in Waseca, Minnesota. in summer of 2004. Asexual reproduction of the new
cultivar by division and tissue culture has shown that
the unique features of 'Cathedral Windows' 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 five years and
represent the characteristics of the new cultivar. These
attributes in combination distinguish 'Cathedral Windows' as a new and unique cultivar of Hosta.
1. The foliage of 'Cathedral Windows' is variegated with
wide dark green margins and bright yellow-green margins
that intensify during the summer. The margins of 'Cathedral Windows' are wider than those of the parent
plant, 'Stained Glass' and comprise an average of
two-thirds of the leaf area.
2. The leaf aspect of 'Cathedral Windows' is dome
shaped, the leaf aspect of 'Stained Glass' is nearly
3. 'Cathedral Windows' is moderate to vigorous grower
and reaches about 48 cm (19 in.) in height and 86 cm in width.
4. 'Cathedral Windows' blooms in late July to late
August with nearly white flowers held above the foliage
on erect scapes.
BRIEF DESCRIPTION OF THE DRAWING
The accompanying colored photographs illustrate the
overall appearance and distinct characteristics of the
new Hosta. The photographs were taken in July of
mature plants of 'Cathedral Windows' as grown outdoors
in Waseca, Minnesota. for a period of five years.
FIG. 1 provides an overall view of the plant habit and
the summer foliage of the new cultivar, 'Cathedral Windows'.
FIG. 2 provides a comparison between a leaf of 'Cathedral Windows' (left) and a leaf of 'Stained Glass' (right) and illustrates the differences in variegation
FIG. 3 provides a comparison between a leaf of 'Cathedral Windows' (top) and a leaf of 'Stained Glass' (bottom) and illustrates the differences in leaf aspect.
The colors in the photographs 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 five 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: 'Cathedral Windows' is a
cultivar of Hosta hybrida.
+ Parentage: Naturally occurring sport of Hosta 'Stained Glass' (not patented).
+ General description:
Blooming period: Blooms
for about 3 to 4 weeks from late July to late August.
Plant habit: Herbaceous
perennial, clump-forming, mounded habit.
Height and spread: Reaches
about 48 cm (19 in.) in height (excluding flower scapes) and
about 86 cm in width.
Zones 3 to 8.
to full shade, moist soils of moderate fertility.
Diseases and pests: Above
average substance confers some resistance to slugs. No
susceptibility or resistance to diseases or other pests
has been observed for 'Cathedral Windows'.
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: Cordate.
Leaf apex: Cuspidate.
Leaf venation: 12
pairs of veins, camptodrome pattern, impressed on upper
surface and raised on lower surface, color matches
Leaf margins: Entire,
flat without undulations, slightly undulated when
Leaf attachment: Petiolate.
Leaf arrangement: Basal,
radiate spirally from base.
Leaf surface: Glabrous
on upper and lower surface in spring, slightly shiny on
upper and glaucous on lower surface on summer foliage.
Leaf substance: Average.
Leaf orientation: Cupped
downward and held nearly horizontal on petioles held
upright or up to about a 45° angle to center.
Leaf variegation pattern: Margins
comprise about one half to two thirds of the leaf area
on mature leaves and average about 6.0 cm (2.4 in.) in width, the
centers are primarily elliptic in shape with addition
narrower areas radiating from the center pattern, a
small intermediate area exists in an irregular pattern
between the boundaries of the margins and centers on the
summer foliage. The variegation is more distinct on
Leaf color: Spring
foliage, upper surface; centers 144B, margins 137B,
lower surface; centers 137D, margins 137C. Summer
foliage, upper surface; centers N144A to N144B, margins
color between 137A with hint of 144A, intermediate areas
primarily 144A, lower surface; centers 145A to 145B,
margins 138A, intermediate areas closest to 139D.
Leaf size: Average
of 22 cm (8.7 in.) in length, average of 22 cm (8.7 in.) in width (mature
Leaf quantity: About
5 to 7 per shoot (eye).
Petiole size: About 40 cm (15.7 in.) in length, about 2.0 cm (0.8 in.) in width.
Petiole color: Variegation
that radiates into leaf blade, inner surface 144B with
edges of 137A with hint of 144A, outer surface 145B with
margins 137A with hint of 144A.
Petiole surface: Glabrous
on spring foliage, shiny on summer foliage.
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
110 cm in length, about 7 mm in width.
Scape color: 144A.
Scape surface: Glabrous,
Leaf bracts: About
2, about 4.0 cm (1.6 in.) in length and 1.5 cm (0.6 in.) in width, 144A to
144B in color (upper and lower surface), broadly ovate
in shape, glabrous to slightly glaucous in texture,
clasping around scape.
+ Flower description:
Inflorescence type: Terminal
racemes of single tubular-shaped flowers.
Lastingness of Inflorescence: About
3 to 4 weeks from first opening bloom to fading of last
opening bloom, individual blooms last about 1 day.
Flower shape: Tubular.
Flower number: About
28 per scape.
Flower internode length: Up
to about 2.0 cm (0.8 in.) .
Flower fragrance: Fragrant.
Flower bud shape: Spathulate.
Flower bud size: Up
to about 5.5 cm (2.1 in.) in length and 1.8 cm (3.1 in.) in diameter.
Flower bud color: Tube
portion 155B, expanded region 155B (whiter) with slight
blush or 85D and 85C.
Flower size: About
5 to 7 cm (2.8 in.) in length and about 2.5 cm (1.0 in.) in diameter with
tube portion an average of 2.0 cm (0.8 in.) in length and 5 mm in
diameter and expanded portion about 4.5 cm (1.8 in.) in length and
2.5 cm (1.0 in.) in diameter.
Flower color: Whiter
than 155B with shading of 85D.
8 mm in length, 3 mm in diameter, 155C in color with
base of 144D.
Perianth features: Comprised
of 6 tepals, 3 interior and 3 exterior, fused in tube
region and about one third of expanded region, one third
of expanded region is overlapping and one third is
Tepal shape: Oblanceolate.
Tepal size: About 6.0 cm (2.4 in.) in length, about 1.8 cm (3.1 in.) in width.
Tepal color: Whiter
than 155B with shading of 85D and tips of 85C.
Tepal texture: Glabrous.
Floral bracts: 1
per flower, broadly ovate in shape, glabrous to slightly
glaucous surface, 144A to 144B in color (upper and lower
surface), up to 3 cm (1.2 in.) in length and 2.0 cm (0.8 in.) in width, acute
apex, clasping base.
Pistil. Style is about 5.5 cm (2.1 in.) in length, 1 mm in width
and 155B in color. Stigma is 3-lobed, 8A in color and
0.75 mm in diameter. Ovary is superior, compound,
composed of 3 locules, oblong in shape, 8 mm in length,
2 mm in width and 144D in color.
stamens, filament is 155B in color, about 5 cm (2 in.) in
length, 1 mm in width, longer than perianth but curved
inward, anthers are 5 mm in length, 2 mm in width,
attachment is versatile, 202A in color, dehiscence is
longitudinal, pollen is abundant and 15C in color.
3-chambered, about 6.0 cm (2.4 in.) in length, 1.0 cm (0.4 in.) in width,
144A to 138A in color.
25 seeds per capsule, about 1.0 cm (0.4 in.) in length and 4 mm in
width, N186A in color.