Hosta rectifolia

Hosta rectifolia

Hosta rectifolia var. rectifolia (T. Nakai 1930)

Subgenus Schmid Giboshi Zonneveld Giboshi
Section Schmid Nipponosta Zonneveld Nipponosta
Hosta Library species file Hosta rectifolia var. rectifolia, part 1

Hosta rectifolia var. rectifolia, part 2

Origin Japan, northernmost regions of Honshu, Hokkaido, Sachalin Island.  See Map.
Habitat Sub arctic, at high elevation in the northernmost area of Honshu, and in Hokkaido and Sakhalin.  It is a hygrophyte found primarily in wet meadows, and near and on shallow banks of lakes and rivers. Most of these locations occur in open, sunny areas, where this taxon successfully competes with other hygrophytes.
Japanese name Tachi Giboshi = the erect or stately hosta, Ezo (or Yezo)  Giboshi, Kurobana Giboshi
Plant 30 cm diameter x 35 cm high (12 x 14"), forming a vase-shaped plant,
Leaf Petiole 17.5–20 cm (7–8"), erect, green with no purple dots at the base. Leaf 17.5–20 cm x 7.5–10 cm wide (7–8" (9) x 3–4" (4.5), erect and in line with petiole, lanceolate, petiole transition decurrent, flat, smooth, shiny light, dull, dark green above, glossy lighter green below, tip acuminate.
5–7 pairs of veins, lightly impressed above, smooth below.
Inflorescense Scape 80–100 (120) cm long (32–40" (48)), straight and erect, perpendicular, not bending, light green, no purple marks, but sometimes dark colored in populations growing in high wetlands.
Sterile bracts, 2–4, clasping stem; fertile bracts, short, blunt, navicular, thin, membranous, green purple-tipped, withering at anthesis, but not falling away.
Raceme 16–25 flowers, widely spaced.
Flowers 5 cm long and 3.5 cm broad (2 x 1.50"), purple-striped, purple, thin narrow tube, perianth expanding, lily-shaped, lobes spreading rapidly, recurving, widely open, 9–12 mm (0.5") pedicels, very projecting; purple-striped inside, thin, narrow tube, perianth expanding, lily-shaped, tepals spreading, recurving, very short pedicels.  H. rectifolia f. albiflora has white tepal coloration; stamens shorter than the perianth, style projecting.
Anthers white posterior, purple sides and anterior.
Blooming Time August/September
Fertility Fertile
Growing conditions  
Suitable for containers  
Special remarks  
In Hosta Mill Collection No
Sports
  • H. atropurpurea is a form with darker flowers
  • H. 'Ogon Tachi' represents a group of yellow forms.
  • H. ‘Ginbuchi Tachi' = Ginbuchi Tachi Giboshi, a white margined form
  • H. ‘Kifukurin Tachi' = Kifukurin Tachi Giboshi, a form with yellow margins.
  • H. ‘Tsugaru Nishiki', a streaked form
  • H. ‘Shigemori Nishiki', a streaked form
  • H. ‘Amime Tachi' : emerges with white veins
  • H. 'Mito-no-Hana' (Japan NR) : silvery white veins

In Japan, a lot of other named streaked and stabilized variegated forms occur, but these are not available in trade.

Progeny
  • H. ‘Dartmoor Forest' (A. Eason/A. & R. Bowden/P. & J. Ruh 2005) = H. rectifolia x (unknown)
  • H. ‘Gosan Gold Mist' (W.G. Schmid NR) = ((H. ‘August Moon') streaky sport [from H. ‘Gosan August Clouds']) x H. rectifolia
  • H. ‘Gosan Gold Sword' (W.G. Schmid 1989) = H. alismifolia x H. ‘Ogon Tachi'
  • H. 'Gosan Line Up' (W.G. Schmid) = H. rectifolia x H. ventricosa
  • H. ‘Grüne Dame' (M. Ahlburg NR) = H. rectifolia hybrid
  • H. 'Hirao Grande' (S. Hirao/R. Lydell/P. Ruh 1997) = H. rectifolia hybrid
  • H. ‘Kiwi Leap Frog' (B. Sligh NR) = H. yingeri x H. rectifolia
  • H. ‘Memories' (P. Ruh 2002) = H. rectifolia x (unknown)
  • H. 'Snowstorm' (L. Simpers 1980) = H. rectifolia hybrid
  • H. 'Tall Boy' (Le Jardin de Botanique de Montreal 1983) = H. rectifolia hybrid or sport
  • H. 'Violetta' (H. Klose 1993) = H. rectifolia hybrid
  • H. 'Yellow Surprise' (E. V. Fisher/K. Hensen 1983) = H. rectifolia hybrid

H. rectifolia var. rectifolia f. pruinosa

Subgenus Schmid Giboshi Zonneveld  
Section Schmid Nipponosta Zonneveld  
Hosta Library species file Hosta rectifolia var. rectifolia f. pruinosa
Origin Japan, form found among natural populations of the species.  See Map.
Habitat Similar to the species
Japanese name Tonoko Tachi Giboshi = the stately, erect hosta, covered with polishing powder
Plant Like the species, except:

The scapes are shorter 70–100 cm long (27–39"), straight and erect, perpendicular, not bending.
Leaves, scapes, raceme and bracts have a grayish powdery, pruinose covering, no purple marks.
Veins 5-8.
The anthers have purple posterior with a white center stripe, purple sides and anterior.

Leaf
Inflorescense
Blooming Time August/September
Fertility Fertile
Growing conditions  
Suitable for containers  
Special remarks  
In Hosta Mill Collection No, but H. 'White Triumphator' is.
Sports H. 'Tonoko Tachi' is the same plant.
Progeny H. 'White Triumphator' is morphologically very much alike, but it has a much whiter coating and white flowers.

H. rectifolia var. australis

Subgenus Schmid Giboshi Zonneveld  
Section Schmid Nipponosta Zonneveld  
Hosta Library species file Hosta rectifolia var. australis
Origin Japan, Northern central Honshu.  See Map.
Habitat It has the same ecology as the species, which includes wetland habitats as well as moist, open forest areas around seepage and along banks of rivers and lakes.
Japanese name Maruba Tachi Giboshi
Plant The macromorphological features of H. rectifolia var. australis are analog to the species, except as follows:
larger in size, to 40 cm diameter. x 36 cm high (16 x 14"), forming a vase-shaped plant.
Leaf Petiole 15–25 cm or longer (6–10"), erect, barely winged or only in the upper part.  The petioles and scape have purple spotted maculation in varying degrees; this is also present early on bud initials and bracts; rounded to elliptical leaves, not as decurrent to the petiole as the type.
Leaves larger and wider than the type with L/W ratio averaging 1.5L to 1.0W; leaves observed as large as 18 cm long x 12 cm wide (7 x 5"), erect and in line with petiole, round to elliptical, wider than the type, petiole transition not as decurrent, flat, smooth, shiny light, dull, dark green above, glossy lighter green below, tip obtuse.
6-8 pairs of veins, lightly impressed above, smooth below.
Inflorescense Scape 45–90 cm long (18–36"), straight and erect, perpendicular, not bending, light green, purple maculation to varying degrees, more so near the base.
Sterile bracts, 1–3, sometimes leafy; fertile bracts, short, blunt, navicular, green purple-tipped, withering at anthesis, but not falling away. Raceme 16–25 flowers, tighter than the type.
Flowers 5 cm long and 3.5 cm broad (2 x 1.50"), purple-striped, purple, thin narrow tube, perianth expanding, lily-shaped, lobes spreading rapidly, recurving, widely open, 9–12 mm (0.5") pedicels.
Anthers purple, with varying white anterior marking.
Blooming Time August
Fertility Fertile
Growing conditions  
Suitable for containers  
Special remarks Rare in cultivation
In Hosta Mill Collection No
Sports H. 'Maruba Tachi' is the same plant.
Progeny