Aquatic and Wetland Vascular Plants of the Northern Great Plains
23. Primulaceae, the Primrose Family
2. Lysimachia L. -- Loosestrife2. Lysimachia hybrida Michx.
Erect or sometimes reclining, rhizomatous perennial 1.5-7 dm tall, simple or occasionally branched from the base, usually branched above. Leaves opposite and petioled below, becoming subverticillate and subsessile above, the basal and lower leaves usually not persistent; blades green above, the same or only slightly paler beneath, ovate-lanceolate to lanceolate, 2-7 cm long, 0.6-2 cm wide, acute, tapered to the subsessile or petiolate base; petioles (0.2)0.6-3(4) cm long, longest on the lower leaves, ciliate at least on the lower half, often over the entire length but more sparingly toward the blade. Flowers solitary from the axils, usually appearing clustered above due to close spacing of the nodes; pedicels 0.8-4 cm long; calyx lobes lanceolate, 3-6 mm long; corolla lobes rotund to obovate, 4-9 mm long, weakly erose, apiculate; anthers 1.5-2 mm long; staminodes as in L. ciliata, 1.2-1.7 mm long. Capsules 3.5-5 mm in diameter; seeds several to many, black, angular, 1-1.5 mm long. Jul--Aug. Wet meadows, marshes, ditches and shores, often in shallow water; occasional, in nw, c and e ND, ne SD and NE Sand Hills; (ME to s Sask., s to n FL, TN, AR and KS; also in NM and AZ). L. verticillata Greene.
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