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(Last Modified On 1/11/2013)
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(Last Modified On 1/11/2013)
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Subspecific
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USSIAEA REPENS L. var. PEPLOIDES (H.B.K.) Grisebach,
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PlaceOfPublication
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Cat. P1. Cubens., 107. 1866.
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Synonym
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Jussiaea peploides H.B.K., Nov. Gen. et Sp. 6:97. 1823. Ludwigia ascendens var. peploides Hara, Journ. Jap. Bot. 28:291. 1953. Jussiaea polygonoides H.B.K., l.c. Jussiaea patibilcensis H.B.K., l.c. Jussiaea Swartziana DC., Prodr. 3:54. 1828. Jussiaea ramulosa DC., l.c. Ludwigia ramulosa Gomez, Anal. Hist. Nat. Madrid 23:66. 1894. Jussiaea repens var. ramulosa Griseb., Cat. P1. Cubens., 107. 1866. Jussiaea polygonifolia Willd. ex Steud., Nomencl. ed. 2, 1:836. 1840. Jussiaea fluitans G. Don, Gen. Syst. 2:692. 1832. Jussiaea repens var. -minor Mich. in Martius, Fl. Bras. XIII, pt. 2:166. 1875. Jussiaea repens var. californica Wats., Bot. Calif. 1:217. 1876. Jussiaea californica Jepson, Fl. West. Mid. Calif., 326. 1901. ]'ussiaea Gamezii Goyena, Fl. Nicaraguense 1:406. 1909.
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Description
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Perennial herb with creeping or floating stems, rooting freely at the nodes, often ascending at the tips, freely branched especially in terrestrial forms, essen- tially glabrous; roots mostly fibrous, sometimes spongy; leaves oblong to spatulate- oblong, obtuse to acute, 1-4 (-6) cm. long, 0.5-2 cm. wide, those above the water tending to be glandular-mucronate, narrowed at base into flattened or winged petioles 0.5-2.5 cm. long, entire, with ca. 7-11 principal veins on each side of the midrib, submarginal vein scarcely evident, leaf-blades usually shining above, somewhat ciliate, minutely pellucid-punctate; pedicels slender, ascending to reflexed in fruit, 1-3 cm. long; bracteoles deltoid, squamate, thickened, 0.5-1 mm. long; sepals 5, linear-lanceolate, subglabrous, 4-7 mm. long, obscurely nerved, acute; petals yellow, obovate, emarginate, 7-14 mm. long; disc flat, hairy; stamens somewhat unequal; filaments slender, 3-6 mm. long; anthers ca. 1 mm. long; style slender, 3-5 mm. long; stigma flattened, shallowly 5-lobed, 1-2.5 mm. wide; ovary subcylindric, 7-14 mm. long; fruit cylindrical, unequally 10-nerved, marked on the surface by the contained seeds, 1-2.5 cm. long, 2-2.5 mm. thick, scarcely if at all narrowed at apex, rather abruptly so at base; seeds in 1 row in each locule, pendulous, included in endocarp, oblique-truncate at ends, somewhat triangular in cross-section, 1-1.5 mm. long.
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Habit
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herb
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Distribution
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In water and on wet banks. Southwestern United States through Mexico to South America except Chile; West Indies.
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Note
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To be expected in Panama.
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