Hosta fluctuans

Hosta fluctuans

H. fluctuans (F. Maekawa 1940)

Subgenus Schmid Giboshi Zonneveld  
Section Schmid Helipteroides Zonneveld  
Hosta Library species file Hosta fluctuans
Origin Japan, the prefectures of northern Yamagata and Fukushima, Akita, Miyagi, Iwate, and Aomori, all in the northern region of Honshu.  See Map.
Habitat Open areas in mountain regions, among tall grasses and subshrubs
Japanese name Kuronami Giboshi = dark hosta with wavy leaves
Plant 60–70 (100) cm diameter, 65 cm high (24–28 (40) x 26"), dome shaped
Leaf Petiole 25–50 cm (10–20"), horizontally spreading, pruinose, glaucous sea-green, purple-dotted, dark basal section, lighter above.
Leaf 20–30 x 12.5–17.5 cm (8–12 (14) x 5–7 (9)".), ovate-cordate, transition tight and contracted, truncate base, tip suddenly cuspidate, wavy, fluctuating, waves irregular, first pruinose then shiny light green above, glaucous green below, smooth.
9–10 pairs of veins, sunken above, projected, smooth below.
Inflorescense Scape length to 130 cm (52"), farinose, glaucous sea-green, often bending, leaning horizontally to sub-horizontally during anthesis, solid, terete, with several large sterile bracts, withering, but persisting after anthesis. Fertile bracts flat and broad, thick and fleshy, green or whitish green, developing and opening in a stellar form.
Raceme 25 cm (10"), 25–35 flowers, densely clustered.
Flowers 5–6 cm long 2-2.50") x 1.50"), whitish, suffused violet to pale purple in bud stage, perianth expanding, funnel-shaped, in the central part dilated bell-shaped, lobes ±angled to the axis of perianth, stamens not superior, equal or slightly shorter than perianth;
tepals white with very light pale violet coloration.
Anthers purple.
Blooming Time July/August
Fertility Fertile
Growing conditions  
Suitable for containers Yes
Special remarks The type itself is rarely seen in cultivation.
In Hosta Mill Collection Yes.
Sports
  • H. 'Sagae' is the well-known yellow margin sport that is often seen in gardens.
  • Ogon Kuronami Giboshi (or Ogon Sagae) is an all yellow form.
Progeny None known of the type.

H. fluctuans f. parvifolia (F. Maekawa 1940)

Subgenus Schmid Giboshi Zonneveld  
Section Schmid Helipteroides Zonneveld  
Hosta Library species file Hosta fluctuans
Origin Like the type.  See Map.
Habitat Like the type. 
Japanese name Kobano Kuronami Giboshi = small-leaved, dark (colored) hosta with wavy leaves.
Plant Like the type. 
Leaf Petiole like the type. 

Leaf smaller, rounded to 20 x 20 cm (8 x 8").

Inflorescense Like the type. 
Blooming Time July/August
Fertility Fertile
Growing conditions Like the type. 
Suitable for containers Like the type. 
Special remarks Extremely rare in cultivation.
In Hosta Mill Collection No
Sports None known
Progeny None known