Polygonum polystachyum Wall.

• Authority

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

• Family

  Polygonaceae

• Scientific Name

  Polygonum polystachyum Wall.

• Description

  Species Description - 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.

• Common Names

  Kashmir plume