Sagittaria australis |
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Appalachian arrowhead, longbeak arrowhead |
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Habit | Herbs, perennial, to 130 cm; rhizomes absent; stolons present; corms present. |
Leaves | emersed; petiole 5-winged, 19–85 cm; blade sagittate, 3–19 × 2.5–11 cm, basal lobes ± equal to remainder of blade. |
Inflorescences | racemes, of 5–12 whorls, emersed, 10–29 × 3–5 cm; peduncles 25–105 cm; bracts distinct or if connate, then less than ¼ total length, lanceolate, 7–30 mm, papery, not papillose; fruiting pedicels spreading to ascending, cylindric, 0.3–2.3 cm. |
Flowers | to 3 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 1–2.2 cm diam.; achenes obovoid, without abaxial keel, 2.1–3.2 × 1.4–2.3 mm, beaked; faces not tuberculate, wings 0–2, ± entire, glands absent; beak lateral, strongly recurved, 4–17 mm. |
2n | = 22. |
Sagittaria australis |
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Phenology | Flowering summer–early fall (Jul–Oct). |
Habitat | Slightly basic to slightly acidic ponds, lakes, and swamps |
Elevation | 1–300 m (0–1000 ft) |
Distribution |
AL; AR; FL; GA; IA; IL; IN; KY; LA; MD; MO; MS; NC; NJ; NY; OH; PA; SC; TN; VA; WV
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Discussion | The name Sagittaria longirostra (Micheli) J. G. Smith has been misapplied to S. australis (J. G. Smith) Small (E. O. Beal et al. 1980). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 22. |
Parent taxa | Alismataceae > Sagittaria |
Sibling taxa | |
Synonyms | S. longirostra var. australis, S. engelmanniana subsp. longirostra |
Name authority | (J. G. Smith) Small: Flora of the Southeastern United States 45. (1903) |
Web links |