Home Flora of Panama (WFO)
Name Search
Markup OCR Documents
Eichhornia crassipes (Mart.) Solms Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in NYBG Virtual HerbariumSearch in Muséum national d'Histoire naturelleSearch in Type Specimen Register of the U.S. National HerbariumSearch in Virtual Herbaria AustriaSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical GardenAfrican Plants, Senckenberg Photo GallerySearch in Flora do Brasil 2020Search in Reflora - Virtual HerbariumSearch in Living Collections Decrease font Increase font Restore font

Project Name Data (Last Modified On 11/1/2012)

Flora Data (Last Modified On 11/1/2012)
PlaceOfPublication DC. Monogr. 4::527. 1883.
Synonym Pontederia crassipes Mart. Nov. Gen. 1:9. 1824. Pontederia azurea Hook. Bot. Mag. p1. 2932. 1829, excl. syn., not P. azurea Sw. Piaropus crassipes (Mart.) Raf. Fl. Tell. 2:81. 1837. Piaropus mesamelas Raf. loc. cit. 1837. Piaropus tricolor Raf. loc. cit. 1837. Eichhornia speciosa Kunth, Enum. P1. 4:131. 1843. Heteranthera forimosa Miq. Linnaea 17:61. 1843. Pontederia elongata Balf. Proc. Bot. Soc. Edinb. 1855:50. 1855. Eichhornia crassicaulis Schlecht. Abh. Nat. Ges. Halle 6:177. 1862. Pontederia crassicaulis Schlecht. loc. cit. 1862. Piaropus crassipes (Mart.) Britton, Ann. N. Y. Acad. 7:241. 1893. Eichhornia cordifolia Gandog. Bull. Soc. Bot. Fr. 66:294. 1920.
Description Floating plants with short, condensed stems and many long, pendant, plumose roots inserted at the stem base; new plants arising through branching and often remaining attached to the parent plant for considerable lengths of time. Leaves with expanded orbicular blades up to 8 cm. broad, and stipulate petioles 2-30 cm. long, petioles excessively inflated in short-petioled leaves, scarcely inflated in very long-petioled leaves. Inflorescence 4-15 cm. long, lightly pubescent with gland- tipped hairs, 4- to 14-flowered. Spathe sub-ensheathing the showy spicate inflores- cence. Flowers lavender, 4-6 cm. long, upper petal with a darker purple-blue blotch bearing a yellow spot in the center; tube narrow, about 1.6 cm. long; sepals slightly narrower than the petals; stamens unequal, the 3 longer well ex- serted, the 3 shorter scarcely extending beyond the tube; filaments glandular- pubescent, adnate to the tube, those of the longer stamens about 2 cm. long, those of the shorter about 0.5 cm. long; anthers linear-oblong, 2-lobed, versatile, about 2.5 mm. long; style elongate with a mop-like capitate stigma. Ovary 3-carpellary, many-ovulate. Seeds 1.2 mm. long, 0.5-0.6 mm. wide.
Distribution United States to Paraguay and the Antilles. Naturalized throughout the tropics of the world.
Note The Water Hyacinth multiplies to such an extent that it frequently chokes waterways and becomes a menace to navigation.
Specimen BOCAS DEL TORO: vicinity of Chiriqui Lagoon, von Wedel 4I5. CANAL ZONE: Gatuin Lake, Allen 1965. CHIRIQUi: swamp, Boquete, alt. 3800 ft., Davidson 6I3; Woodson d ScherY 743.
© 2023 Missouri Botanical Garden - 4344 Shaw Boulevard - Saint Louis, Missouri 63110