Sagittaria longiloba Engelm. ex J.G. Sm.

Family: Alismataceae

Pertinent Synonyms & Notes (particularly those used in California; go to GRIN for other synonyms)


Pertinent Common Names (particularly those used in California; go to GRIN for other common names)

longbarb arrowhead

Primary Disseminule Type


Description (diagnostics are in brown)

Fruit a winged achene, obliquely obovate to oblanceolate in outline (outline is of the laterally compressed fruit), 1.2–2.5 mm long x 0.8–1.6 mm wide x ca. 0.1 mm thick, with a vertically-pointing beak (stylar remnant) measuring 0.1–0.6 mm long near the apex of the ventral wing, dorsal wing about as wide as ventral wing. Surface light brown, with 0–1 elongated and often curved resin-filled glands on each face, rough (wrinkled or mildly tuberculate). Pericarp thin (± transparent).

Fruit attachment scar at base, same color as rest of fruit body or whitish.

Embryo upside-down U-shaped, its form visible on fruit's surface, endosperm absent.

Similar Species

Similar Species Comparison Chart

Risk Assessment (codes in yellow or red indicate cause for concern; assessments are current as of mid-2011; click AUQP, NZBORIC, or NZBPI for access to the most recent versions of these databases and possible assessment changes)