. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. Genus i. PICKEREL-WEED FAMILY. 463 i. Pontederia cordata L. Pickerel-weed. Fig. 1161. Pontederia cordata L. Sp. PI. 288. 1753. Pontederia lancifolia Muhl. Cat. 34. 1813. Pontederia cordata var. angustifolia Torr. Fl. N. U. S. 1: 343. 1824. Pontederia cordata lancifolia Morong, Mem. Torr. Club 5: 105. 1894. Stem rather stout, i°-4° tall. Leaves ovate to lanceola
. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. Genus i. PICKEREL-WEED FAMILY. 463 i. Pontederia cordata L. Pickerel-weed. Fig. 1161. Pontederia cordata L. Sp. PI. 288. 1753. Pontederia lancifolia Muhl. Cat. 34. 1813. Pontederia cordata var. angustifolia Torr. Fl. N. U. S. 1: 343. 1824. Pontederia cordata lancifolia Morong, Mem. Torr. Club 5: 105. 1894. Stem rather stout, i°-4° tall. Leaves ovate to lanceolate, cordate-sagittate, truncate or narrowed at the base, 2'-io' long, i'-6' wide, the apex and basal lobes obtuse; basal lobes often with long narrow stipule-like appendages on the sheathing petiole; spadix and inflorescence glandular-pubescent; peri- anth about 4" long, it and the filaments, anthers and style bright blue, its tube curved, slightly longer than the lobes, middle lobe of the upper lip with 2 yellow spots at the base within; ovary oblong, tapering into the slender style; stigmas minutely 3-6-toothed. Borders of ponds and streams, Nova Scotia to Minne- sota, south to Florida and Texas. After flowering the lobes and upper part of the perianth-tube wither above, while the persistent base hardens around the fruit. The flowers are trimorphous. Includes several races, differ- ing in width of leaves. 2. HETERANTHERA R. & P. Prodr. Fl. Per. 9. 1794: [Schollera' Schreb. Gen. 785. 1789. Not Roth. 1788.] Herbs with creeping, ascending or floating stems, the leaves petioled, with cordate, ovate, oval or reniform blades, or grass-like. Spathes i-flowered or several-flowered. Flowers small, white, blue or yellow. Lobes of the perianth nearly or quite equal, linear. Stamens 3, equal or unequal, inserted on the throat of the perianth. Ovary fusiform, entirely or in- completely 3-celled by the intrusion of the placentae; ovules numerous; stigma 3-lobed. Fruit
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
