Sagittaria latifolia Willd.
  • Sp. Pl.
  • Wapato, common arrowhead, duck-potato, sagittaire latifoliee

This taxon is accepted by Alismataceae
Notes: More details could be found in The Plant List v.1.1. Originally in The Plant List v.1.0

General Description

Herbs, perennial, to 45 cm; rhizomes absent; stolons present; corms present. Leaves emersed; petiole triangular, erect to ascending, 6.5--51 cm; blade sagittate, rarely hastate, 1.5--30.5 ´ 2--17 cm, basal lobes equal to or less than remainder of blade. Inflorescences racemes, rarely panicles, of 3--9 whorls, emersed, 4.5--28.5 ´ 4--23 cm; peduncles 10--59 cm; bracts connate more than or equal to ¼ total length, elliptic to lanceolate, 3--8 mm, delicate, not papillose; fruiting pedicels spreading, cylindric, 0.5--3.5 cm. Flowers to 4 cm diam.; sepals recurved to spreading, not enclosing flower or fruiting head; filaments cylindric, longer than anthers, glabrous; pistillate pedicellate, without ring of sterile stamens. Fruiting heads 1--1.7 cm diam; achenes oblanceoloid, without abaxial keel, 2.5--3.5 ´ to 2 mm, beaked; faces not tuberculate, wings absent, glands (0--)1(--2); beak lateral, horizontal, 1--2 mm. 2n = 22.

4. Sagittaria latifolia Willd., Sp. Pl. 4: 409 (1805). Tipo: Canadá, Muhlenberg s.n. (US).

Por A. Lot H. y A. Novelo R.

Sagittaria latifolia Willd., Sp. Pl. 4: 409. 1805; S. hastata Pursh; S. gracilis Pursh; S. esculenta Howell; S. obtusa Muhl. ex Willd.; S. ornithorhyncha Small; S. planipes Fernald; S. simplex Pursh; S. variabilis Engelm.; Urospatha friedrichsthalii Schott.

Hierbas perennes, glabras o pubescentes, hasta 45 cm de alto, con rizomas erectos y/o estolones; rizomas hasta 2 cm de largo y 0.5–1 cm de diámetro, estolones hasta 30 cm de largo y 0.3 cm de diámetro. Hojas emergentes, sagitadas o raramente hastadas, 10–30.5 cm de largo y 3.3–17 cm de ancho, ápice agudo o raramente obtuso, con 7–13 nervios, los lobos basales 4.5–16.5 cm de largo, separados entre sí 3.5–23 cm, con 4–6 nervios; pecíolos triangulares, 23.5–51 cm de largo, con una vaina 8–17.5 cm de largo en la base. Inflorescencia un escapo simple o raramente paniculado, con 3–9 verticilos, 13–28.5 cm de largo y 4–23 cm de ancho, los verticilos con 3 flores, pedúnculos triangulares, 32.5–59 cm de largo, brácteas lanceoladas, 4–8.4 mm de largo y 6.4–7 mm de ancho, delicadas a ligeramente gruesas, glabras, con el ápice obtuso a ligeramente agudo, pedicelos patentes a ascendentes cuando en flor y fruto, cilíndricos, 1.4–2.6 cm de largo y 1.1–1.4 mm de diámetro, flores unisexuales; sépalos reflexos a patentes, 5.5–9 mm de largo y 3–7 mm de ancho, glabros; pétalos unguiculados, 0.9–1.4 cm de largo y 0.8–1.9 cm de ancho, la uña 1–1.5 mm de largo; flores estaminadas con filamentos lineares, 1–3 mm de largo, glabros, anteras 1.2–1.9 mm de largo; flores pistiladas sin anillo de estambres estériles. Fruto rostrado, 2.5–3.5 mm de largo y hasta 2 mm de ancho, márgenes enteros o ligeramente dentados, caras sin alas y con (0–) 1 (–2) glándulas; rostro lateral, horizontal, 1–2 mm de largo.

Conocida en Nicaragua por una sola colección (Moreno 1628) de áreas inundadas y a lo largo de los márgenes de caños y lagos, Nueva Segovia; 500–700 m; fl y fr ago; ampliamente distribuida desde Canadá hasta Ecuador.

Perennes, provenientes de rizomas o cormos,monoicas o dioicas. Hojas erectas, con pecíolo hastaca. 70 cm, la lámina 12–35 3–30 cm, linear a am-pliamente ovada, sagitada en la base. Infl. bisexual o (frecuentemente) unisexual, emergente, con 3–9 vertici-los simples (rara vez los inferiores ramificados), cada uno con 3 fls. Fls. con estambres 16–18 (fls.estaminadas), sin estambres estériles en las fls. pistiladas; pistilos estériles ausentes en las fls. estaminadas.Cabeza frutal 10–13 10–15 mm; pedicelo ascendente; sépalos reflexos; aquenios 2.5–3.5 mm, la cara lat-eral lisa o con 1(2) glándula, el pico lateral, 1–2 mm, horizontal.

"Vegetatively very plastic, ± erect and with large, edible tubers; lvs sagittate or sometimes narrow and phyllodial, the blade 5–40 × 0.5–25 cm, with narrow or broad lobes; scape 1–12 dm, with 2–15 whorls of fls, sometimes branching at the lowest whorl, the upper fls staminate on short pedicels, the lower pistillate on longer, ± ascending pedicels; bracts 4–15 mm, boat-shaped, broad-based, rounded above or broadly acute, 4–15 mm, papery but friable at the tip; sep ovate, obtuse, 5–11 mm, reflexed in fr; pet 1–2 cm; stamens 20–40, on slender, glabrous filaments; achenes 2.5–4 mm, winged on the margins only, or with a poorly developed wing on each face, with (var. latifolia) or without (var. pubescens) resin-ducts; beak 0.6–1.8 mm, set at essentially right angles to the body; 2n=22. Abundant in swamps, ponds, and streams; N.S. and Que. to s. B.C., s. to trop. Amer. July–Sept. The widespread, glabrous var. latifolia is uncommon in the principal range of the stellate-hairy var. pubescens (Muhl.) J. G. Sm., which occurs chiefly from the mts. to the coast, from s. Pa. to W.Va. and Ga., w. occasionally to O., Tenn., and Tex."


Common Names

Wapato, common arrowhead, duck-potato, sagittaire latifoliee

 Information From

World Flora Online Data. 2017.
  • A CC0 1.0 Universal (CC0 1.0).
MBG Floras Images
Flora images. Missouri Botanical Garden. Accessed on Jun. 2018.
  • B Missouri Botanical Garden
  • C Missouri Botanical Garden
Flora de Nicaragua
WD Stevens, CU Ulloa, A Pool and OM Montiel. Missouri Botanical Garden Press, 2001
  • D Missouri Botanical Garden
Flora of North America @
'Flora of North America @ eFloras (2008). Published on the Internet [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  • E Flora of North America Association
New York Botanical Garden
Descriptions of plants should be attributed to the full citation for each individual article, chapter or book that is the source for each record, which should include the authors of original publication.
  • F Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
Flora Mesoamericana
Gerrit Davidse, Mario Sousa Sánchez, A. O. Chater, Universidad Nacional Autónoma de México. Instituto de Biología, Missouri Botanical Garden, Natural History Museum (London, England) UNAM, 1994
  • G Missouri Botanical Garden
Manual de Plantas de Costa Rica
Hammel, B. E.; Grayum, M. H.; Herrera, C.; Zamora, N. Manual de Plantas de Costa Rica. Missouri Botanical Garden Press, 2003-2014
  • H Missouri Botanical Garden
World Flora Online consortium
World Flora Online Data. 2018.
  • I CC0 1.0 Universal (CC0 1.0).