BACKGROUND OF THE INVENTION
The present invention relates to the new and distinct Hosta plant, Hosta ‘American Hero' discovered
by Amy Bergeron at a
nursery in Zeeland, Mich., USA as
an uninduced whole-plant mutation in a tissue cultured
crop of Hosta ‘Loyalist' (not patented) the
summer of 2005. The new plant has been successfully
asexually propagated both by division and by tissue
culture at a nursery in Zeeland, Mich. Both methods of
asexual propagation systems have been found produce
stable and identical plants that maintain the unique
characteristics of the original plant.
BRIEF BRIEF SUMMARY OF THE INVENTION
Hosta 'American Hero' differs from its parent, 'Loyalist’, as
well as all other hostas known to the applicant.
The most similar known hosta cultivars are: 'Americana' (not patented), 'Loyalist' (not patented), 'Revolution' (not patented), 'Paul Revere' (not
patented), 'Fire and Ice' (not patented) and 'Pathfinder (not patented). 'Loyalist’, 'Fire and Ice' and 'Paul Revere' all appear to be identical to each
other, but are independently derived sports all from 'Patriot' with flat leaves having a dark-green margin
and white center having a small number of green speckles
in the center. 'Revolution’, 'Americana' and 'American
Hero' are directly or indirectly sports (mutations) of 'Patriot' (not patented). All seven of the Hosta
cultivars listed above have similar leaf variegation
patterns with the green margins and whitish centers. Hosta ‘American
Hero' has a highly-contrasting,
wide, deep-green leaf margins with a bright white leaf
centers which have a unique speckling of green flecks of
irregular lengths and widths. The new plant also has
unique veining that produces an extreme twisting of the
leaf blades.
TABLE 1 |
|
VARIEGATED Hosta COMPARISON |
|
CENTER LEAF |
MARGIN LEAF |
|
CULTIVAR |
COLOR |
COLOR |
SUBSTANCE |
|
'American Hero’ |
creamy white with |
dark green |
very high |
|
green flecks |
|
|
'Americana’ |
creamy white |
dark green |
high |
'Fire and Ice’ |
creamy white |
dark green |
high |
'Loyalist’ |
creamy white |
dark green |
moderate |
'Pathfinder’ |
creamy white with |
dark green |
moderate |
|
green flecks |
|
|
'Paul Revere’ |
creamy white with |
dark green |
moderate |
|
green flecks |
|
|
'Revolution’ |
creamy white with |
dark green |
high |
|
heavy green flecks |
|
|
|
The closest comparison variety is 'Revolution’, and it
differs primarily in that 'American Hero' has more
twisted leaves with unusual fusing of veins. The new
plant specifically differs from the parent 'Loyalist' in
having heavier substance foliage, green flecking in the
leaf center, more twisted foliage and an unusual fusing
of the veins. Hosta ‘American Hero' differs from
all other hostas known to the applicant, by the
combination of the following traits:
o
1. Compact plant habit with stiffly-upright,
heavily-substance, twisted, variegated leaves with dark
green margins and creamy centers having an irregular
green flecking.
o
2. Light mint green scapes with upright facing buds and
light lavender flowers beginning in mid July.
o
3. Primarily parallel veins with irregular fusing near
the leaf edges.
BRIEF DESCRIPTION OF THE DRAWINGS
The photograph of the new plant demonstrates the overall
appearance of the new plant including the unique traits
as a three-year old plant grown in a container in a
greenhouse with 50% shade and supplemental water and
fertilizer as needed. The colors are as accurate as
reasonably possible with color reproductions. Ambient
light spectrum, temperature, source and direction may
cause the appearance of minor variation in color.
FIG. 1 shows the new plant in a container.
DETAILED BOTANICAL DESCRIPTION
The following descriptions and color references are
based on the 2001 edition of The Royal Horticultural Society Colour Chart except where common dictionary
terms are used. The new plant, Hosta ‘American
Hero’, has not been observed under all possible
environments. The phenotype may vary slightly with
different environmental conditions, such as temperature,
light, fertility, moisture and maturity levels, but
without any change in the genotype. The following
observations and size descriptions are of a three-year
old plant in a 50% shaded trial garden in Zeeland, Mich.
with and supplemental water and fertilizer.
+ Botanical Classification: Hosta hybrid (Tratt.).
§
Variety denomination: 'American Hero'.
+ Parentage: Uninduced whole-plant mutation of Hosta
‘Loyalist'.
+ Propagation: Garden division and sterile plant tissue
culture.
§
Time to initiate roots from tissue culture: About 18
days.
§
Growth rate: Moderate.
§
Crop time: About 12 weeks to finish during the summer in
a 3.8 liter container from an established 2.5 cm (1.0 in.) tissue
culture plug.
§
Rooting habit: Fleshy, slightly branching, with roots up
to 25 cm (10 in.) long.
+ Plant shape and habit: : Hardy herbaceous perennial with
basal rosettes of leaves emerging from rhizomes,
producing a symmetrical mound of distinctly upright
leaves in youth, becoming slightly more horizontally
mounded with age.
§
Plant size: Foliage height about 45 cm (17.7 in.) tall from soil
line to the top of the leaves and about 55 cm (21.7 in.) wide at
the widest point about 25 cm (10 in.) above soil line.
+ Foliage description: Cordate, acute leaf apex with
cordate base.
§
Leaf blades: Simple, entire, puckered or corrugated
especially in tissue between leaf center and margin;
blade twisted; heavy substance or leaf thickness from
upper to lower leaf surfaces; up to 18 cm (7 in.) long and 7.0 cm (2.8 in.)
wide, average 15 cm (5.9 in.) long and 13 cm (5 in.) wide; usually
bi-laterally symmetrical; glabrous and glaucous below,
glabrous and shiny above; variegation pattern variable
with the margin between about 5.5 cm (2.1 in.) to 2.0 cm (0.8 in.) wide in
the blade center with some acute white points extending
into the margin; dark green margin narrows near the apex
to about 0.5 cm (0.2 in.) wide; flecks in the creamy-colored
center vary in size from 2.0 cm (0.8 in.) long and 3.0 mm wide to
1.0 mm long and 0.5 mm wide with an average fleck about
2.0 mm long and 1.0 mm wide.
§
Leaf blade color:
§
Adaxial
(top) margin: Nearest RHS 139A upon
emerging and mid-summer.
§
Abaxial
(bottom) margin: Nearest RHS 137B shortly
after emerging and nearest RHS N138B mid-summer.
§
Adaxial center: Between
RHS 150D and RHS 154D with flecks of nearest RHS 137B
and others lighter than RHS N138D shortly after
emerging; by mid-summer the base color develops to
lighter than RHS 155C with flecks of nearest RHS 139B,
RHS 137A and lighter than RHS N138D.
§
Abaxial center: Between
RHS 150D and lighter than RHS 145D with flecks of RHS
nearest RHS 145C and RHS 137C shortly after emerging; by
mid-summer the base color develops to nearest RHS 155C
with flecks of RHS 193A, RHS 137D and RHS 141C.
§
Petiole: Entire, glabrous; stiff; mostly straight from
base of plant to leaf base, concave center about 7.0 mm
deep; about 30.0 cm long and 1.0 cm (0.4 in.) wide at base; edge
or margin of petiole with a green stripe, about 2 mm
wide at base and 4 mm wide near blade.
§
Petiole color: Margin nearest RHS 139A and center
nearest RHS 155A without green flecks.
§
Veins: Mostly parallel but often fusing near blade edge
and tip; raised on abaxial side and impressed on adaxial
surface; 9 to 10 pair.
§
Veins color: Same as surrounding leaf on both adaxial
and adaxial sides and transition as leaf color through
the season.
+ Flower description:
§
Buds one day prior to opening: About
1.5 cm (0.6 in.) diameter at widest point and 6.0 cm (2.4 in.) long; globose
center with acute and base narrowing to a diameter of
about 4.0 mm in diameter.
§
Bud color: Light
lavender between RHS 85C and RHS 85D; terminal 1.0 mm to
2.0 mm of apex nearest RHS 139C.
§
Flowers: Funnelform;
with broadly flared tepals; 30 to 35 per scape; about
6.2 cm (2.4 in.) wide and 7.0 cm (2.8 in.) long, (distal flowers smaller),
persists for a normal period, usually one day on plant
or as cut flower; scapes remain effective with flowers
from mid-July to mid-August; no detectable fragrance.
§
Bracts: Each
flower subtended by a single bract to 6.5 cm (2.6 in.) long and
2.0 cm (0.8 in.) wide decreasing in size distally; glaucous
underneath, shiny above and glabrous both surfaces;
margin entire, sessile with straight base, apex acute;
concaved supporting flower bud; margin irregular, about
3.0 mm wide on largest bracts and decreasing
proportionally on smaller bracts; center portion about
85% of total expanded width.
§
Bract color: Adaxial
margin nearest RHS 139A with an uneven or jagged inside
border; Adaxial center nearest RHS 150D; Abaxial margin:
mm wide margin of nearest RHS 136B; Adaxial center:
nearest RHS 145D; All surfaces of bracts with tinting of
nearest RHS N186C in form of tiny speckling concentrated
in areas of more light exposure, especially distally;
Veins: same color as surrounding tissue on adaxial and
abaxial surfaces.
§
Tepal: Two
sets of three, fused at base; clavate with acute apex;
glabrous, entire; approximately 6.0 cm (2.4 in.) long and 1.5 cm (0.6 in.)
wide.
§
Tepal color: Each
set of three tepals colored independently; Outer set of
three tepals: adaxial surface with base color of nearest
RHS 76B with five veins of nearest RHS 76A and a thin
margin of white (without tinting) at the basal ½ of the
tepal; abaxial color nearest RHS 76D; Inner set of three
tepals: adaxial surface with broad white (without
tinting) margin of about 5.0 mm wide at center with a
clear margin of about 2.0 mm extending distally starting
in the center and extending to apex; center stripe of
about 4.0 mm wide of between RHS 76A and RHS 76B;
abaxial color nearest RHS 76D with a 2.0 mm clear margin
starting at the middle and extending to the apex.
§
Gynoecium: Style: single, about 8.5 cm (3.3 in.) long, 1.0 mm
diameter, curved upward at distal end a total of 90
degrees; color lighter near white, nearest RHS 155B;
Stigma: globose, about 1.5 mm in diameter; near white,
nearest RHS 155B.
§
Androecium: Filaments: six, about 1.0 mm in diameter and
6.8 cm (2.7 in.) long, curved upward distally a total of 90
degrees; near white, whiter than RHS 155D; Anthers:
about 3.0 mm long and 1.0 mm wide; dorsifixed; dehiscent
longitudinally; nearest RHS 158D; Pollen: elliptical,
less than 0.1 mm long, nearest RHS 17A.
§
Peduncle: One per mature division; initially glaucous,
becoming dull; glabrous; without vertical ridges;
upright, usually to 90 degrees from horizontal; about 55 cm (21.7 in.) tall, and up to 8.0 mm in diameter at base; average
size about 50.0 cm tall and 7.0 mm diameter; color
between RHS 145D and RHS 150D with stippling nearest RHS
N186C concentrated in areas of more light exposure,
especially distally.
§
Pedicel: Approximately 6.0 mm long, 2.0 mm wide;
straight; lighter than RHS 76D; Fruit: tri-loculicidal
capsule, about 3.5 cm (1.4 in.) long and 8.0 mm diameter; while
developing nearest RHS 145D with tinting nearest RHS
N186C and when mature nearest RHS 164C.
+ Seed: Flattened single-winged nutlet with swollen embryo
at one end; about 7.0 mm long, 2 mm wide and 1.5 mm
thick at embryo; nearest RHS 202A.
§
Disease and pest resistance: Hosta ‘American
Hero' stands up and resists slug infestation better than
most other hosta plants in garden situations but
has not been observed to be resistant to other diseases
common to hostas beyond normal. The plant grows
best and shows best coloration with plenty of moisture,
adequate drainage and light shade, but is able to
tolerate some sun or drought when mature. Hardiness at
least from USDA zone 3 through 9, and other disease
resistance is typical of that of other hostas. |