Hosta okamotoi
aka Okuyama Gibōshi

The Hostapedia by Mark Zilis (2009) says that this plant is "...native to Japan ; related to Hosta rupifraga... small size mound of medium green leaves...petioles reddish...very shiny leaf underside."

According to The Genus Hosta by W. George Schmid (1991), this species was "...growing epiphytically on tree trunks in the shady valleys...by Shogo Okamoto..."

Schmid says that the plant is of medium size about 12 inches high with a spread of around 14 to 16 inches. The smooth textured leaves are green, wavy and "fleshy-leathery". Its flowers are white on the outside but pale purple suffused on the inside with anthers that are yellow with purple dots. They bloom in September and produce viable seeds.

The New Encyclopedia of Hostas by Diana Grenfell (2009) states: "In cultivation, usually seen only in specialist collections."

Similar species include Hosta aequinoctiiantha and H. longipes.

Taxonomists (people who categorize and name living organisms such as plants) can go into dizzying detail in their arguments over what constitutes a species. However, for most of us, a simple definition is that the plant either currently exists in the wild or there is evidence (fossils, herbaria specimens, etc.) that it once did.

In his investigations, Schmid (1991) found such evidence for 43 species of hostas including the following:

Our database has listings of cultivars related to each of these species of hostas.

In nature, variations occur within plant species that are not great enough to warrant naming an entire new species. These identifiable variations on the wild species are called varieties. Yes, this term is commonly also used, although incorrectly, to signify what is really a cultivar i.e. cultivated variety.

In addition to the 43 species listed above, Schmid (1991), also listed the following significant botanical varieties (naturally occurring) and forms of the genus Hosta:

H. clausa normalis

H. kikutii caput-avis

H. kikutii var. kikutii forma leuconata

H. kikutii var. polyneuron

H. longipes var. caduca

H. longipes forma hypoglauca

H. longipes latifolia

H. longipes forma sparsa

 
H. longipes forma viridipes
H. longipes var. vulgata

H. longissima var. longifolia

H. montana forma macrophylia

H. plantaginea var. japonica

H. sieboldii forma angustifolia

H. sieboldii forma okamii

H. sieboldii forma spathulata

 

 
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