Other names: Wasabia japonica, Japanese horseradish, Japanese horse radish
W. wasabi is a tender, slow-growing, mound-forming, evergreen perennial with a thick, edible rhizome-like underground stem, long-stalked, glossy, heart-shaped, mid-green leaves and racemes of tiny, white flowers in spring.
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0.6m max. spread |
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0.6m max. height |
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2-5 years to maturity |
Sagittaria sagittifolia (Japanese arrowhead)
Other names: Old World arrowhead, Common arrowhead, Common arrow leaf, Water archer, Swamp potato, Swan potato, Hawaiian arrowhead, Arrow head, Sagittaria japonica
S. sagittifolia is a vigorous, deciduous, marginal to aquatic perennial with arrow-shaped, mid-green leaves above the water and curled, linear, submerged leaves. In summer, upright scapes bear racemes of white flowers with a purple mark at the base of each petal.
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1m max. spread |
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0.9m max. height |
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5-10 years to maturity |
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