Hosta kikutii

Hosta kikutii

Hosta kikutii var. kikutii (Maekawa 1937)

Subgenus Schmid Giboshi Zonneveld Giboshi
Section Schmid Rynchophorae Zonneveld Rynchophorae
Hosta Library species file Hosta kikutii var. kikutii
Origin The type is found in eastern Kyushu, southern part of the Japanese archipelago.  See Map.
Habitat Most populations are found in river valleys, where they grow on wet rocks (lythophytes) in ravines and canyons. Occasionally, H. kikutii epiphytic populations are found, on large tree trunks. The conditions are invariably very moist.
Japanese name Hyuga Giboshi=  the hosta from Hyuga
Plant 45 cm diameter x 25 cm high (18 x 12").
Leaf Petiole 13 cm long (5.2"), ascending in an arch, light green. Leaf 18–23 x 7.5–11 cm (7–9 x 3–4.50"), elliptical, ovate to lanceolate, petiole-leaf transition narrowly truncate, acuminate, very elongated, drooping tip, with flat surface, but convolute at the base, no waves or very slight waves margin, not rugose, shiny dark green above, shiny light green below. 
8–12 pairs of veins, closely spaced, sunken above, projected below.
Inflorescense Scape 50 cm (20"), erect, but leaning in the upper part, smooth round.
Sterile lower bracts leaf-like, with exterior bracts enveloping the interior; occasionally ±2 large sterile leaf-like bracts near bud forming beak-like configuration of the unopened flower bud initial; fertile bracts navicular, broad, thick, first green, but opening white, withering late, but persisting at anthesis, 2 x 1 cm (0.75 x 0.33"), some larger.
Raceme short, densely imbricated, 10–20 flowers.
Flowers mostly white, shiny, sometimes very lightly suffused purple in the center of the tepal, but light purple coloration is present, particularly on the exterior of the unopened flower bud; 4.5 cm long (1.75"), carried horizontally on strong, 2.5 cm long (1") pedicels, which sometimes extend beyond the bracts; perianth expanding, funnel-shaped, in the central part dilated bell-shaped, lobes spreading @+angled to the axis of perianth; stamens as long as perianth or extending beyond it. Anthers purple.
Blooming Time Late August to early September.
Fertility Fertile.
Growing conditions  
Suitable for containers Very suitable.
Special remarks  
In Hosta Mill Collection Yes
Sports
  • H. 'Harvest Delight' (Summers/Ruh 1997) = H. kikutii selection ?
  • H. 'Kifukurin Hyuga' = a collective name given to several different sports and hybrids with a yellow margin.
  • H ‘Shirofukurin Hyuga' = a white margined sport
Progeny
  • H. 'Ahwaneeh' (U. Syre-Herz 1990) = H. montana macrophylla x H. kikutii
  • H. 'Conquistador' (R. Livingston) = H. Fragrant Blue' x H. kikutii
  • H. 'Fatal Attraction' (H. Gowen/R. Olson/R. Benedict 1999) = H. Dorset Clown' x H. kikutii
  • H. 'Finlandia' (A. Summers/A. Busse/P. Ruh 1997) = H. kikutii hybrid
  • H. 'Glacier Cascade' (M. Zilis/P. Cross 1999) = H. kikutii x H. hypoleuca
  • H. 'Harvest Desire' (A. Summers/P. Ruh 1997) = H. longipes x H. kikutii
  • H. 'Hirao Splendor' (S. Hirao/M. Zilis/P. Ruh 1997) = H. kikutii hybrid
  • H. 'Kiwi Biddy Blue' (B. Sligh) = H. kikutii hybrid
  • H. 'Lancelot' (R. Lysne 2005) = H. Halcyon' x H. kikutii
  • H. 'Mikawa-no-yuki' (H. Sugita/P. Ruh 1997) = H. kikutii x H. longipes
  • H. 'Okazaki' (H. Sugita/P. & J. Ruh 2002) = H. kikutii "white back" x H. gracillima "white back"
  • H. 'Roy's Pink' (H. Benedict 1991) = H. kikutii x H. rupifraga
  • H. 'Stingray' (R. Herold 2000) = H. kikutii x H. montana
  • H. 'Summer Dress' (U. Syré-Herz 1990) = H. August Moon' x H. kikutii

Hosta kikutii var. kikutii f. leuconota (W.G. Schmid/AHS 1993)

Subgenus Schmid Giboshi Zonneveld  
Section Schmid Rynchophorae Zonneveld  
Hosta Library species file H. kikutii var. kikutii f. leuconota
Origin Japan, southern Kyushu,  Kagoshima-ken and Satsunan Islands region.    See Map.
Habitat In shady forests and sub-montane areas, mostly among populations of the species type, rarely as allopatric populations.
Japanese name Hosoba Urajiro Hyuga Giboshi = narrow leaved, white-backed hosta from Hyuga
or
Urajiro Hyuga Giboshi

The Japanese name can cause confusion, as the form doesn't originate from Hyuga

Plant 45 cm diameter, 25 cm high (18 x 12").
Leaf Petiole 13–15 cm (5–6 ") ascending in a low arch, light green.
Leaf 18–23 x 5–7.5 cm (6–10 x 2–4"), elliptical, ovate to lanceolate, petiole-leaf transition decurrent to the petiole, acuminate, very elongated tip, with flat surface, not rugose, first lightly pruinose above, later shiny dark green above, grayish white pruinose below, lasting.
5–9 pairs of veins, closely spaced, sunken above, projected below.
Inflorescense Scape 40 cm (16"), leaning below 30°, smooth, terete, slightly pruinose green or green.
Sterile lower bracts and upper fertile, bracts first navicular, then flattening, first green then white, withering but persistent at anthesis, 2 x 0.6 cm (0.75 x 0.25").
Raceme short, densely imbricated, 10–20 flowers.
Flowers white, shiny, 5 x 3 cm (2 x 1.25"), carried horizontally on strong, 1.5 cm long (0.6") pedicels; tepals white, sometimes very lightly suffused purple in the center, perianth expanding, funnel-shaped, in the central part dilated bell-shaped, tepals spreading ±angled to the axis of perianth; stamens as long as perianth or surpassing it.
Anthers purple.
Blooming Time August/September
Fertility Fertile
Growing conditions  
Suitable for containers Yes
Special remarks  
In Hosta Mill Collection No
Sports  
Progeny
  • H. 'Tidewater' (M. Zilis/ECGC Distributers 2003) = H. kikutii f. leuconota x H. 'Elegans'
  • H. 'Ultramarine' (Mark Zilis/M. Vanous 2003) = H. Sea Lotus Leaf' x H. kikutii f. leuconota
  • H. ‘Mikawa-no-yuki'= H. kikutii f. leuconota x H. longipes

Hosta kikutii var. caput-avis (Maekawa 1950/AHS 1993)

Subgenus Schmid Giboshi Zonneveld  
Section Schmid Rynchophorae Zonneveld  
Hosta Library species file H. kikutii var. caput-avis
Origin Japan, west-central Shikoku.  See Map.
Habitat  
Japanese name Unazuki Giboshi = bowing head Hosta
Plant 30 cm diameter, 15 cm high (12 x 6").
Leaf Petiole 7.5 cm (3") spreading horizontally, light green.
Leaf 15-20 x 5-8 cm (6-8 x 2-3"), or +larger; elliptical to lanceolate, petiole-leaf transition decurrent, acuminate, very elongated, drooping tip, with flat surface, slight undulate in margin, not rugose, dark green with slight sheen above, shiny green below.
4-7 (9) pairs of veins, closely spaced, projected below.
Inflorescense Scape 15–30 cm (6–12"), smooth, round, bending acutely at ground level, growing horizontally (or sub-horizontally on rocky cliffs), usually below the leaf mound. In H. kikutii var. tosana the bending occurs further up the scape.
Sterile lower bracts, leaf-like, with exterior bracts enveloping the interior, in some specimens ±2 large sterile leaf-like bracts near bud forming beak-like configuration of the un-opened flower head; fertile bracts flat and broad, thick, first green, but turning mostly white, withering, persistent at anthesis, 2 x 1 cm (0.75 x 0.33").
Raceme short, densely imbricated, 6–16 flowers.
Flowers white, shiny, sometimes very lightly suffused purple in the center of the tepal ; 4.5 x 3 cm across the lobes (1.75 x 1.25"), carried horizontally on strong, 2.5 cm long (1") pedicels, which sometimes extend beyond the bracts; perianth expanding, funnel-shaped, in the central part dilated bell-shaped, lobes spreading ±angled to the axis of perianth; stamens shorter or as long as perianth; style projecting. Anthers purple.
Blooming Time August.
Fertility Fertile.
Growing conditions  
Suitable for containers Yes
Special remarks  
In Hosta Mill Collection Yes, Sugita form
Sports
  • H. kikutii var. tosana is considered a synonym.
  • H. ‘Kinokawa' : a sport  with white-splashed and mottled leaf variegation and pure white flowers on nodding scapes
  • H. ‘Tosanoumi Unazuki' : a streaky white plastome mutant
Progeny
  • H. 'Captain Teach' (H. Sugita/P. Ruh/P. & J. Ruh 2001) = H. kikutii var. caput-avis hybrid
  • H. 'Petticoat Pink' (H. Sugita/P. Ruh/J. Ruh 2001) = H. kikutii var. caput-avis hybrid
  • H. 'Red Neck Heaven' (Tony Avent 1998) = H. kikutii caput-avis x H. kikutii caput-avis
  • H. 'Uncle Albert' (Bridgewood Gardens) = H. hypoleuca x H. kikutii caput-avis

Hosta kikutii var. polyneuron (Fujita 1976/AHS 1993)

Subgenus Schmid Giboshi Zonneveld  
Section Schmid Rynchophorae Zonneveld  
Hosta Library species file H. kikutii var. polyneuron
Origin Japan, Shikoku Island, in Kochi-ken,near the Ishizuki and Akaishi mountain ranges, in Ehime-ken and in Kagawa-ken.  See Map.
Habitat Moist, shady valleys and ravines and in higher mountain passes together with alpine grasses and subshrubs.
Japanese name Sudare Giboshi = Rattan blind Hosta. 
A rattan blind is a bamboo blind or screen with closely spaced slats
Plant 60 cm diameter x 25 cm high (24 x 12").
Leaf Petiole 13 cm (5.2") ascending in an arch, light green.
Leaf 18–25 x 7.5–11 cm (7–10 x 3–4.50"), elliptical, ovate to lanceolate, petiole-leaf transition attenuate to rounded, elongated, drooping tip, with flat surface, slightly convolute at the base, no waves or slight waves margin, not rugose, shiny dark green above, shiny light green below.
9-11 (13) pairs of veins, very closely spaced, sunken above, projected below.
Inflorescense Scape 50 cm (20"), straight, smooth round.
Sterile lower bracts small, leaf-like, with exterior bracts enveloping the interior; occasionally ±2 larger sterile leaf-like; fertile bracts navicular, broad, thick, first green, but opening white, withering late, but persisting at anthesis, 2 x 1 cm (0.75 x 0.33"), some larger.
Raceme short, densely imbricated, 10–20 flowers.
Flowers mostly white, shiny, sometimes very lightly suffused purple in the center of the tepal; 4.5 x 3 cm across the lobes (1.75 x 1.25"), carried horizontally on strong, 2.5 cm long (1") pedicels, which sometimes extend beyond the bracts; perianth expanding, funnel-shaped, in the central part dilated bell-shaped, lobes spreading @+angled to the axis of perianth; stamens as long as perianth or extending beyond it. Anthers purple.
Blooming Time Late August to early September.
Fertility Fertile.
Growing conditions  
Suitable for containers Yes
Special remarks  
In Hosta Mill Collection No
Sports
  • H. ‘Kifukurin Sudare': a collective name for a number of different yellow-margined sports.
  • H. ‘Sudare Shirofukurin Wakayama' : a white-margined sport from Wakayama-ken
  • H. ‘Sudare Shirofukurin Shikoku' : a white-margined sport from Shikoku
  • H. ‘Yoshinogawa' : a white-green streaked sport from Yoshino River
Progeny
  • H. 'Raspberry Beauty' (J. Dishon 1999) = H. kikutii var. polyneuron x H. 'Summer Fragrance'

Hosta kikutii var. yakusimensis (Maekawa 1940/AHS 1993)

Subgenus Schmid Giboshi Zonneveld  
Section Schmid Rynchophorae Zonneveld  
Hosta Library species file H. kikutii var. yakusimensis
Origin Japan, Southern Kyushu region in Kagoshima-ken and northern Satsunan Islands location in the Osumi Shoto island group and on Shikoku Island in Kōchi-ken and Ehime-ken. See Map.
Habitat In shady forests and sub-montane areas in flooding river valleys and rocky banks, occasionally wet montane soils with rocky base.
Japanese name Hime Hyuga Giboshi = small hosta from Hyuga
Plant To 50 cm diameter x 13 cm high (20 x 5").
Leaf Petiole 11 cm (4.5"), spreading horizontally, light green.
Leaf 20 x 5–7 cm (8 x 2–3"), lanceolate, petiole-leaf transition decurrent, acuminate, very elongated, drooping tip at maturity, with flat upper surface, margin is flat or has slight waves, no rugosity, deep dark green, slight sheen above, shiny lighter green below.
5–8 (9) pairs of veins, closely spaced, sunken above, projected below.
Inflorescense Scape 40 cm (16"), terete, straight but leaning below 30°, smooth, terete, shiny light-green, in some clones with muted purple dotting, giving a darker appearance.
Sterile lower bracts and upper fertile first navicular, then flattening, first green then white, withering but persistent at anthesis, 2 x 0.6 cm (0.75 x 0.25").
Raceme short, densely imbricated, 10–20 flowers.
Flowers white, shiny, 5 cm long x 3 cm across the tepals (2" x 1.25"), carried horizontally on strong, short pedicels; tepals white, sometimes very lightly suffused purple in the center, perianth expanding, funnel-shaped, in the central part dilated bell-shaped, tepals spreading ±angled to the axis of perianth; stamens as long as perianth or surpassing it.
Anthers purple.
Blooming Time August/September
Fertility Fertile
Growing conditions  
Suitable for containers Yes
Special remarks  
In Hosta Mill Collection Yes
Sports  
Progeny
  • H. 'Bojangles' (D. Dean 1999) = H. 'Swoosh' x H. kikutii var. yakusimensis