H. longipes
'Maruba Iwa'

This is a selection of H. longipes latifolia from an unknown originator which was registered in 2009 by Kevin Walek (Hosta Registrar) of Virginia and re-registered with new data in 2018. It is a small size hosta which grows to 8 inches in height with a spread of around 20 inches with a semi-upright growth habit. The foliage has smooth texture on its shiny medium green leaves with a greenish yellow marginal variegation. Lavender flowers with translucent edges are borne in September.

Nomenclature changes recommended in the 1991 book The Genus Hosta by W. George Schmid and accepted by The American Hosta Society would update names as follows: H. tortifrons is now H. 'Tortifrons' and H. tardiflora is H. 'Tardiflora'.

Mikiko Lockwood in an article on The Hosta Library titled, A Little About Japanese Hosta Terms defines the term iwa as rock, Iwa Gibōshi or H. longipes and the term maruba as round leaf or round-leafed.

An article about Fall Bloomers by Herb Benedict and Jim Wilkins in The Hosta Journal (1991 Vol. 22 No. 1) states that, "Here are some of the fall blooming plants we grow...(listed in the order of bloom times in Michigan).

1) H. kikutii A medium size plant densely flowering with white blooms. The flowers are equally arranged around the central axis of the raceme so that the bloom scapes resembles a bottle brush or pony tail...We are growing two named varieties, 'Hirao-59' and 'Finlandia'.
2) H. 'Fall Bouquet' Small, green plant, leaves slightly undulated, lavender scape and blooms, floriferous.
3) H. longipes Small green plant, densely flowering with a tall stiff bloom scape. The flowers are lavender and the leaves are green.
4) H. gracillima Funnel-shaped, light lavender flowers. A miniature green plant, with shiny surface.
5) H. 'Iwa Soules' Iwa means rock, and this plant was imported by Marjorie Soules, from Japan. It is a small green plant with lavender flowers.
6) H. tortifrons In the same section (Picnolepis) as H. longipes and H. rupifraga. Distinctive small plant, with twisted green leaves and lavender flowers.
7) H. 'Fused Veins' Small, green leaves often with ¼ inch margin which is a lighter green. The lance shaped leaves are undulated and the veins come together regularly. The flowers are mauve and the scape is sometimes branched.
8) H. rupifraga Small, medium green, with thick, leathery, ovate leaves. Densely flowering with purple flowers. 'Urajiro', 'Grand Slam', 'Maruba Iwa'
9) H. tardiflora   This small hosta is the last to bloom for us. Its leaves are shiny, dark green and lance shaped. The flowers are light lavender and borne in abundance on 12 inch scapes.

Herb Benedict and Jim Wilkins include their observations about using fall blooming hostas in hybridizing programs:
1) H. tardiflora  × self Tends to flower 2 weeks earlier. 90% of the progeny have the flowers secund (flowers all on one side of the bloom stalk) and in 10% they are evenly arranged around the central axis of the raceme (nonsecund).
2) H. rupifraga × H. tardiflora Beautiful very tough plant with a taller bloom stalk. Blooms 2 weeks earlier.
3) H. 'Maruba Iwa' × H. tardiflora Taller bloom stalk. Blooms 2 weeks earlier. 30% of progeny have nonsecunded flowers.
4) H. gracillima × H. tardiflora Very nice small plant, with leaves intermediate between the two. Beautiful flowers.
5) H. rupifraga × H. kikutii   The best of this cross is called 'Roys Pink'. It is a perfect intermediate. The leaf is long, heart shaped and very thick. The flowers are pony tail in type, a light pinkish color and spent flowers drop off cleanly.

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