|
(Last Modified On 1/11/2013)
|
|
|
|
(Last Modified On 1/11/2013)
|
|
Species
|
JUSSIAEA URIUGUAYENSIS Camb.
|
|
PlaceOfPublication
|
St. Hilaire, Fl. Bras. Merid. 2:264. 1829.
|
|
Synonym
|
Ludwigia urugayensis Hara, Journ. Jap. Bot. 28:294. 1953. Jussiaea grandiflora Michx., Fl. Bor. Am. 1:267. 1803, not J. grandiflora R. & P., 1802. Jiassiaea repens var. grandiflora Mich. in Martius, Fl. Bras. XIII, pt. 2:167. 1875. Ludwigia clavellina var. grandiflora Gomez, Anal. Hist. Nat. Madrid 23:66. 1894. Jussiaea stenophylla Gillies ex Hook., Bot. Misc. 3 :3 12. 18 3 3. Jussiaea Stuckerti Levl., Bull. Acad. Geogr. Bot. 17:210. 1907. Jussiaea repens var. hispida Hauman-Merck, Anal. Mus. Nac. Buenos Aires 24:406. 1913. Jussiaea grandiflora formae natans, semimersa and terrestris Glueck, Beihefte Bot. Central- bl. 39:355-3 56. 1923. Jussiaea Michauxiana Fernald, Rhodora 46:197. 1944.
|
|
Description
|
Perennial herb from creeping rhizome, rooting freely at nodes, sometimes also bearing pneumatophores, stems usually reddish and of three possible types: (1) slender, floating, scarcely branched, glabrous, 3-10 (-15) dm. long and with leaves remote, floating, oblong or obovate, glabrous, 1-4 cm. long, 1-1.5 cm. wide, obtuse, entire, narrowed gradually or abruptly into slender petioles 1-2 cm. long; (2) erect or ascending, succulent or even somewhat woody, usually soft- hirsute, somewhat angled, simple or freely branched, 3-6 dm. high, with leaves rather crowded, ascending, linear-lanceolate to oblanceolate or oblong, the lower spatulate to obovate, entire, mostly soft-hairy, usually gland-mucronate, narrowed gradually into winged petioles 1-5 (-25) mm. long, with ca. 10-12 principal fairly prominent veins on each side of midrib, the submarginal vein scarcely developed, leaf-blades 3-6 (-10) cm. long, 0.3-1 (-3) cm. wide, often with fascicles of reduced leaves in axils; stipules deltoid, gland-thickened; and (3) compact, much branched, creeping, rooting freely at nodes, thus forming mats on sand or mud, the stems 1-10 dm. long, pubescent; leaves spatulate to oblanceolate, 0.5-1.8 cm. long, usually pubescent, very short-petioled, with axillary fascicles; flowers solitary in axils on erect type of branch; pedicels 1-2 (-5) cm. long, spreading or reflexed in fruit, glabrous to hairy; bracteoles at base of ovary, lanceolate, 0.5-1 mm. long; ovary sublinear, 7-10 mm. long, hairy; sepals 5 (6), lanceolate, acute, hairy, 6-13 mm. long, indistinctly 3-nerved; petals bright yellow, oblong-ovate, 12-20 mm. long, emarginate, short-clawed; disc plane, pilose; stamens unequal; filaments 3-4 and 2-3 mm. long; anthers 2-3 mm. long; style slender, 4-5 mm. long; stigma capitate, 1.5-2 mm. thick; capsule subcylindric, 10-nerved, usually hairy, plainly marked externally by the contained seeds, abruptly narrowed at the base, but not at all at the apex, 1.3-2.5 cm. long, 3-4 mm. thick; seeds pendulous, enclosed in the hard endocarp and thus made to appear truncate at both ends, triangular in cross section, 1.5 mm. long, 1.5 mm. wide.
|
|
Habit
|
herb
|
|
Distribution
|
In water and moist places. Southeastern United States, Guatemala and Costa Rica, Ecuador, Peru, Brazil to Argentina. To be expected in Panama.
|
|
Tag
|
|
|
|
Project Name
|
|
Tag
|
|
|
|