Hosta sieboldii

This is another Japanese species that has a long history and which has had several different names. It is a small sized (13 inches high) plant that forms a dense mound of elliptic to narrowly ovate shaped foliage. The leaves are slightly wavy, have smooth texture and thin substance. It produces funnel shaped, medium purple flowers in August.

According to Zilis (2000), this plant has also been known as either Hosta albomarginata or Hosta lancifolia albomarginata in the past.

The Hostapedia by Mark Zilis (2009), states, "Unfortunately, it was designated as a species in 1838 and serves as the type for a large taxonomic group of hostas (Schmid 1991, p. 99). For this reason, George Schmid chose not to reclassify Hosta sieboldii as a cultivar. Instead, the green-leaved form found in the wild was designated a form of the species i.e., Hosta sieboldii f. spathulata (ibid, p. 104)."

The species is named for famed plant explorer, Philip von Siebold.

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 var. normalis

H. kikutii var. caput-avis

H. kikutii var. kikutii forma leuconata

H. kikutii var. polyneuron

H. longipes var. caduca

H. longipes forma hypoglauca

H. longipes var. 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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