PENNSYLVANIA SMARTWEED
File Size: 48 KB
 
Persicaria pensylvanica   (L. ) M. G√≥mez
[=Polygonum pensylvanicum L.]
Cloud County, Kansas
Annual
Height: 4-80 inches
Family: Polygonaceae - Buckwheat Family
Flowering Period:   July, August, September,October
Stems: Ascending to erect, simple or branched, glabrous or appressed-pubescent distally, eglandular or stipitate-glandular distally.
Leaves: Mostly cauline, alternate, ocrea brown, cylindric, .2 to .8 inch, chartaceous, base inflated, margins truncate, eciliate or ciliate with bristles to .02 inch, surface glabrous or appressed-pubescent, eglandular; petiole .04 to 1.2 inch; blade sometimes with dark triangular blotch adaxially, narrowly to broadly lanceolate, 1.6 to 9 inches long, .4 to 1.9 inches wide, base tapered to cuneate, margins antrorsely scabrous, apex acuminate, surfaces glabrous or appressed-pubescent, eglandular or glandular-punctate abaxially and occasionally adaxially so.
Inflorescences: Terminal and axillary, usually erect, rarely nodding, uninterrupted, .2 to 2 inches tall, .2 to .6 inch wide; peduncle .4 to 2.5 inch, glabrous or pubescent, usually stipitate-glandular; ocreolae subtending clusters of flowers, overlapping, margins eciliate or with bristles to .02 inch. Pedicels ascending, .06 to .18 inch.
Flowers: 2-14 per fascicle; perianth greenish white to rose, glabrous, not glandular-punctate; tepals 5, obovate to elliptic, .1 to .2 inch, veins prominent, not anchor-shaped; stamens 6-8, included; styles 2(-3), deciduous, included.
Fruits: Achenes brown to black, usually discoid, rarely 3-angled, .08 to .13 inch, shiny, smooth. Seeds 1.
Habitat: Mud flats in marshes and along shores of ponds and lakes, wet prairies, playas, spring runs, ditches, moist disturbed sites, waste places
Distribution: Throughout Kansas
Comments: Persicaria, peach and pertaining to, alluding to the resemblance of the leaves of some species to those of the peach and pensylvanica, Pennsylvanian.

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