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FNA | Family List | FNA Vol. 22 | Alismataceae | Sagittaria

3. Sagittaria montevidensis Chamisso & Schlechtendal, Linnaea. 2: 156. 1827.

Sagittaire spongieuse

Herbs, annual or perennial, to 100 cm; rhizomes present; stolons present; corms present. Leaves submersed and emersed; submersed leaves absent or phyllodial, flattened, to 17 ´ 2 cm; emersed leaves with petiole triangular, 21--55 cm, blade hastate to sagittate, 2.5--17.5 ´ 0.6--22 cm, lobes longer than or equal to remainder of blade. Inflorescences racemes or panicles, of 1--15 whorls, floating or emersed, 1.5--28 ´ 1.5--15 cm; peduncles 15--47 cm; bracts distinct or connate less than ΒΌ total length, lanceolate to elliptic, 4--34 mm, delicate, not papillose; fruiting pedicels recurved, club-shaped, 0.5--4.2 cm. Flowers 2--5 cm diam.; sepals spreading in staminate, erect in pistillate, enclosing flower or fruiting head; filaments cylindric, longer than anthers, glabrous; pistillate pedicellate, with or without ring of sterile stamens. Fruiting heads 1.2--2.1 cm diam.; achenes oblanceoloid, not abaxially keeled, 2--4.3 ´ 0.7--1.5 mm, beaked; faces not tuberculate, wings absent, glands 1; beak lateral, horizontal, 0.4--0.8 mm.

Subspecies 3 (3 in the flora): North America; Mexico; South America.

1 Plants of tidal mud flats, often stranded by low tide, emersed blades spatulate, rarely sagittate.   3b subsp. spongiosa
+ Plants of fresh waters, not stranded by low tide; emersed blades hastate to sagittate.   (2)
2 (1) Pistillate flowers without ring of sterile stamens; petals with purple spot at base   3a subsp. montevidensis
+ Pistillate flowers with ring of sterile stamens; petals without purple spot at base.   3c subsp. calycina

Lower Taxa


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