Polygonum hydropiperoides Stanford
Family: Polygonaceae
[Polygonum opelousanum Riddell ex Small,  more]
Polygonum hydropiperoides image
Enrique Moreno & David Roubik  
Slender herb, to ca 1 m tall, often +/- reclining, subglabrous. Petioles usually less than 5 mm long; blades linear-lanceolate, long-acuminate at apex, acute and decurrent on petiole at base, 4-15 cm long, 0.5-1.5 cm wide, inconspicuously pellucid-punctate, usually strigose on midrib and veins below, minutely ciliate; ocreae 1-3 cm long, with strigose apical cilia to 8 mm long. Inflorescences terminal, spikelike racemes or panicles of few branches; flowers interrupted along rachis, fasciculate, light purplish to greenish, subtended by ciliate ocreolae 2-3 mm long; pedicels exceeding ocreolae ca 1 mm, articulate at apex; tepals usually 5, ovate, 2-3 mm long; stamens usually 9, ca 1.5 mm long; ovary trigonous; styles 3, ca 1 mm long. Achenes trigonous, 2-3 mm long, brown to black, inconspicuously beaked. Shattuck 840. Collected once by Shattuck at Gigante Bay. Apparently flowering and fruiting throughout the year.