Biorepository Data Portal

Persicaria wallichii is an ornamental that escapes infrequently in the flora area. A population in Nova Scotia apparently was ephemeral. Plants with leaf blades sparsely to densely pubescent abaxially and pedicels glabrous are var. wallichii, to which naturalized North American plants appear to be referable. Plants with leaf blades brownish-tomentose abaxially and pedicels usually pubescent are var. tomentosa S. P. Hong, which may be in cultivation in North America.

A Himalayan sp. that is reported to spread occasionally from cult. in the ne. part of our range. It would key to P. densiflorum, from which it differs in its showy, open-paniculate infls, often wider lvs (to 8 cm wide) that tend to be narrowly truncate or cordate-auriculate at base, and in other respects. It is more nearly related to nos. 37 [Polygonum cuspidatum Siebold & Zucc.] and 38 [Polygonum sachalinense F. W. Schmidt], but the tepals are not keeled or winged and are scarcely accrescent.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

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