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Collector:
Walter N. Koelz
Polygonum spergulariiforme
Rheum webbianum
Polygonum aviculare
Polygonum aviculare subsp. depressum
Polygonum rottboellioides
Polygonum japonicum var. japonicum
Polygonum affine
Polygonum achoreum
Pteropyrum olivieri
Polygonum microcephalum
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