Hosta clausa

Hosta clausa varieties and forma

Hosta clausa var. normalis ((Koidzumi) Nakai 1930)

Subgenus Schmid Bryocles Zonneveld  
Section Schmid Stoloniferae Zonneveld  
Hosta Library species file Hosta clausa var. normalis
Origin in provinces Kyonggi-do, Kangwon-do (1988 accessions x M. G. Chung), Hwanghae-do, Pyongannam-do, Hamgyongnam-do and Pyonganbuk-do, central and northern Korea.  Also in Liaoning and Jilin provinces of northeastern China.
Habitat Along streams on sandy soil in open areas
Japanese name Sakuhana Giboshi =Open flower hosta
Korean name Ju-geok-bi-bi-chu
Plant 25–30 cm diameter x 25–30 cm high (10–12" by 10–12"). Rootstock stoloniferous, wide-ranging, arising sympodially to form new shoot, most morphs are spreading rather than clumping.
Leaf Petiole 5–10 x 0.50 cm (2–4.0 x 0.20" wide), erect, ribbed on back, green, forming a vase-shaped plant.
Leaf 8–16 long x 4–8 cm (3-6.5 long x 1.5–3"); some wide-leaved morphs have leaves to 10 cm (4") wide; leaves erect and in line with petiole, lanceolate to oblanceolate, petiole transition very gradual, non-angular, acuminate tip, generally flat surface, no waves in margin, erect, rigid, leathery, shiny, dark green above, glossy lighter green below.
4–5 (6) pairs of veins, sunken above, very projected, smooth, below.
Inflorescense Scape 35–60 cm (14–24"), terete, straight and erect, becoming perpendicular to the ground, green, slightly purplish red tinted at the base. Fertile bracts short, navicular, grooved, green or whitish green, imbricated, withering at anthesis, but not falling away.
Raceme long, 20–25 cm (8–10") densely imbricated at first, then evenly spaced, 15–30 flowers. Perianth open slightly bell-shaped.  Very pointed bud, grooved, deep bluish violet, carried horizontally on strong, very short, incurved pedicels.
Anthers purple.
Blooming Time August
Fertility Fertile
Growing conditions  
Suitable for containers  
Special remarks  
In Hosta Mill Collection Yes
Sports  
Progeny
  • H. 'Beauty Little Blue' (Jan Van den Top 1997) = H. Blue Cadet' x H. clausa var. normalis
  • H. 'Claudia' (Diana Grenfell) = H. sieboldii x H. clausa f. normalis
  • H. 'Golden Arrow' (R. Herman 1996) = sport of a H. clausa var. normalis seedling.
  • H. 'Purple Lady Finger' (R. P. Savory 1982) = H. longissima x H. clausa.

Hosta clausa var. clausa (F. Maekawa 1937)

Subgenus Schmid Bryocles Zonneveld Bryocles
Section Schmid Stoloniferae Zonneveld Stoloniferae
Hosta Library species file Hosta clausa var. clausa
Origin H. clausa var. clausa is found sporadically and rarely among H. clausa var. normalis populations in Hwanghae-do, Pyongannam-do, Pyonganbuk-do, and Hamgyongnam-do in central and northern Korea; and provinces Liaoning and Jilin in northeastern China.

Korea.  See Map.

China.  See Map.

Habitat only along streams
Japanese name Tsubomi Giboshi = Closed flower ball (bud) hosta
Koreans name Cham-bi-bi-chu
Plant  
Leaf  
Inflorescense Perianth distended but remaining closed.  Very pointed bud, grooved, deep bluish violet, carried horizontally on strong, very short, incurved pedicels.
Anthers purple.
Ovaries abort and the perianths drop off unopened without producing fruit.
Blooming Time August
Fertility Sterile, flowers do no open.
Growing conditions  
Suitable for containers Less suited for containers, due to the rhizomatous spreading habit.
Special remarks  
In Hosta Mill Collection Yes
Sports  
Progeny  

Hosta clausa var. ensata ((F. Maekawa) W.G. Schmid 1991)

Subgenus Schmid Bryocles Zonneveld  
Section Schmid Stoloniferae Zonneveld  
Hosta Library species file Hosta clausa var. ensata
Origin In provinces Liaoning and Jilin in northeastern China (Yalu Basin); and far eastern USSR. Part of allopatric populations in Korea. 

Korea.  See Map.

China.  See Map.

Habitat On streamside rock outcrops
Japanese name Tsurugi Giboshi = Sword-shaped hosta
Korean name I-sak-bi-bi-chu
Chinese name dong bei yu zan
Plant Smaller habit
Leaf Upright, “sword-shaped,” narrower leaves, shorter scapes and smaller habit
Inflorescense  
Blooming Time August/September
Fertility Fertile
Growing conditions  
Suitable for containers  
Special remarks  
In Hosta Mill Collection No
Sports  
Progeny  

Hosta clausa var. stolonifera (W.G. Schmid 1991)

Subgenus Schmid Bryocles Zonneveld  
Section Schmid Stoloniferae Zonneveld  
Hosta Library species file Hosta clausa var. stolonifera
Origin Korea, provinces Kyonggi-do and Kangwon-do, Hwanghae-do.
Habitat Under the dense cover of native willows
Japanese name  
Plant  
Leaf  
Inflorescense Forms no scapes
Blooming Time Forms no inflorescence
Fertility Sterile
Growing conditions  
Suitable for containers  
Special remarks  
In Hosta Mill Collection No
Sports  
Progeny  

Hosta clausa var. latifolia (T.B. Lee 1980)

Subgenus Schmid Bryocles Zonneveld  
Section Schmid Stoloniferae Zonneveld  
Hosta Library species file Hosta clausa var. latifolia
Origin As H. clausa var. normalis
Habitat Like H. clausa var. normalis
Korean name Neol-beun-ok-jam-hwa
Plant  
Leaf A wide leafed morph
Inflorescense  
Blooming Time  
Fertility  
Growing conditions  
Suitable for containers  
Special remarks  
In Hosta Mill Collection No
Sports  
Progeny