BACKGROUND OF THE INVENTION
The present invention, Hosta Atlantis, relates
to a new and distinct cultivar of Hosta,
botanically known as a Hosta hybrid, hereinafter
referred to as 'Atlantis'.
The inventors discovered the new cultivar, 'Atlantis,
in summer of 1998 in a cultivated growing area in
Waseca, Minnesota. 'Atlantis' originated as a naturally
occurring chimeral mutation of Hosta Abba Dabba
Do' (unpatented). The parent plant, Hosta, 'Abba Dabba
Do, is a variegated mutation of the gold foliaged
cultivar, Hosta Sun Power' (unpatented). 'Atlantis' is unique in having wide yellow-green margins
surrounding green centers. The variegation pattern is
similar to the parent plant 'Abba Dabba
Do, however the
margins of 'Atlantis' are significantly wider. 'Atlantis' has a similar leaf variegation pattern to 'Satisfaction' (unpatented) and H. montana Aureo
Marginata'. In comparison to 'Atlantis,
the leaves of 'Satisfaction' are broader, more
heart-shaped, and lack the terminal twist at the leaf
Marginata' differs from 'Atlantis' in having a more mounded, less
upright plant habit, leaf blades that curve more
downward and leaf blades that lack the twist at the
Asexual reproduction of the new cultivar was first
accomplished by the inventors utilizing in vitro
Waseca, Minnesota. in fall of 2002. Asexual
reproduction of the new cultivar by division and tissue
culture has shown that the unique features of 'Atlantis' are stable and reproduced true to type in successive
BRIEF SUMMARY OF THE INVENTION
The following traits have been repeatedly observed in
trials in North Carolina and Minnesota for a period of
six years and represent the characteristics of the new
cultivar. These attributes in combination distinguish 'Atlantis' as a new and unique cultivar of Hosta.
1. The foliage of 'Atlantis' is variegated with
yellow-green margins and green centers. The margins of 'Atlantis' comprise about one third of the leaf area,
the margins are much wider than the parent plant, 'Abba Dabba
2. The plant habit of 'Atlantis' is upright and
3. 'Atlantis' reaches a height of about 77 cm (2.8 in.), exclusive
of flower scapes, and a spread of about 178 cm (30.8 in.) in six
4. 'Atlantis' has large leaves with undulating margins
with a twist at the leaf apex.
5. 'Atlantis' blooms in mid summer with pale lavender
flowers that arise above the foliage.
BRIEF DESCRIPTION OF THE DRAWING
The accompanying colored photographs illustrate the
overall appearance and distinct characteristics of the
new Hosta. The photographs were taken of mature
plants of 'Atlantis' and 'Abba Dabba
Do' as grown
outdoor in Waseca, Minnesota. under the same conditions for
FIG. 1 was taken in June and provides an overall view of
the foliage and plant habit of the new cultivar, 'Atlantis'.
The photograph in FIG. 2 was taken in August and
provides a comparison between a leaf of 'Atlantis' (shown on left) and 'Abba Dabba
Do' (shown on right) as
grown in light shade.
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 6 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: 'Atlantis' is a cultivar of Hosta of hybrid origin.
+ Parentage: Naturally occurring chimeral mutation of Hosta Abba Dabba
Do' (not patented).
+ General description:
Blooming period. About
3 to 4 weeks from early July to early August.
Plant habit. Herbaceous
perennial, clump-forming, upright and mounded foliage of
Height and spread. Reaches
about 77 cm (2.8 in.) in height (excluding flower scapes) and
about 178 cm (30.8 in.) in width.
shade to medium shade, moist soils of moderate
fertility. Margin color is lighter in deeper shade.
Diseases and pests. No
susceptibility or resistance to diseases or pests has
been observed for 'Atlantis'.
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. Vigorous.
+ Foliage description:
Leaf shape. Broadly
Leaf division. Simple.
Leaf base. Cordate.
Leaf apex. Cuspidate,
typically with a twist at the tip when leaves are
Leaf venation. 16
to 18 pairs of veins, camptodrome pattern, impressed on
upper surface and raised on lower surface, color matches
Leaf margins. Entire,
Leaf attachment. Petiolate.
Leaf arrangement. Basal,
radiate spirally from base.
Leaf surface. Upper
glabrous, lower glaucous.
Leaf substance. Average.
Leaf orientation. Held
horizontal on upright petioles.
Leaf color. Spring
foliage (upper and lower surface); centers 137A, margins
144B, irregular intermediate area between the margins
and centers 146C. Mature leaves (upper and lower
surface); centers 137A, margins 144B when grown in heavy
shade and 8C when grown in light shade, intermediate
Leaf variegation pattern. Margins
about 2.5 to 6.0 cm (2.4 in.) in width, comprising about one third
of the leaf area.
Leaf size. About
32 cm (12.5 in.) in length, about 20 cm (7.9 in.) in width.
Leaf quantity. About
5 to 7 per shoot (eye).
Petiole size. About
48 to 54.0 cm (21 in.) in length, about 1.5 to 1.75 cm (29.5 in.) in width.
Petiole color. Inner
surface 138B, outer surface 138C.
Petiole surface. Glabrous.
Petiole shape. Sulcate.
+ Flower scape description:
Scape shape. Round,
Scape number. One
per mature eye under normal growing conditions.
Scape posture. Straight,
held upright at about 80 to 90° from horizontal.
Scape size. About
115 cm (45 in.) in length, about 1.0 cm (0.4 in.) in width.
Scape color. 137A.
Scape surface. Glabrous.
Leaf bracts. 1
per scape if present, centers are 137A in color, margins
are 144B in color, ovate in shape, average of 2.5 cm (1.0 in.) in
length and 1.2 cm (0.5 in.) in width, occur 43 cm (17 in.) from base of
+ Flower description:
Inflorescence type. Terminal
racemes of bell-shaped flowers on elongated scapes.
Lastingness of inflorescence. About
3 to 4 weeks from first opening bloom to fading of last
opening bloom, individual blooms last about one day.
Flower shape. Bell-shaped.
Flower number. 32
to 45 per scape.
Flower internode length. About
4.0 cm (1.6 in.) .
Flower fragrance. None
Flower bud shape. Spathulate.
Flower bud size. About
4.5 cm (1.8 in.) in length and 1.5 cm (0.6 in.) in diameter.
Flower bud color. Emerges
85C with markings of 85D, matures to 85D with markings
Flower size. About 5 cm (2 in.) in length and about 4.0 cm (1.6 in.) in diameter including tube
portion, tube portion is 2.0 cm (0.8 in.) in length and 4 mm in
Flower color. 91D
1.5 cm (0.6 in.) in length, 2 mm in diameter, 91D in color,
Perianth features. Comprised
of 6 tepals, 3 interior and 3 exterior, overlapping in
expanded region and fused in tube region.
Tepal shape. Oblanceolate.
Tepal size. About
4.0 cm (1.6 in.) in length, up to 1.5 cm (0.6 in.) in width.
Tepal color. Outer
surface 91D, inner surface 91D with center markings
about 5 mm in width of 85A.
Tepal texture. Glabrous.
Tepal margin. Entire.
Tepal apex. Acute.
Floral bracts. 1
per flower, ovate in shape, glabrous surface, 146D in
color, up to 4.0 cm (1.6 in.) in length and 2.0 cm (0.8 in.) in width (larger at
base of plant decreasing in size towards apex), clasping
base, acute apex.
Pistil, extends about 1.0 cm (0.4 in.) beyond apex of tepals, 5 to 6.0 cm (2.4 in.) in length, 8D in color, stigma is 3-lobed and 8D in
color, ovary is superior, compound, composed of 3
locules, 8 mm in length, 3 mm in width, 145C in color.
stamens, 8D in color, 5 cm (2 in.) in length, 1 mm in width,
distal portion is curved, length is equal or slightly
shorter than edge of tepals, anthers are 3 mm in length,
1 mm in width, attachment is versatile, 202A in color,
dehiscence is longitudinal, pollen is abundant and 15B
3-chambered, about 2.5 to 3 cm (1.2 in.) in length, 8 mm in width,
137A, in color.
to 30 seeds per capsule, about 5 to 6 mm in length and 3
mm in width, 202A in color.