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Sagittaria latifolia

bird's-eye pearlwort, broad-leaf arrowhead, common arrowhead, duck-potato, Indian potato, sagittaire latifoliee, wapato

Sanford's arrowhead, valley arrowhead

Habit Herbs, perennial, to 45 cm; rhizomes absent; stolons present; corms present. Herbs, perennial, to 130 cm; rhizomes present; stolons absent; 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.

emersed, sessile, phyllodial, lenticular, or with petiole triangular, to 53 cm, blade lance-elliptic, 11–18 × 1.5–4.5 cm.

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.

racemes, of 3–9 whorls, emersed, 2–13.5 × 3–6 cm;

peduncles to 75 cm;

bracts connate more than ¼ total length, lanceolate, 5–8 mm, delicate, not papillose; fruiting pedicels recurved, cylindric, 0.5–2.5 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.

to 3.5 cm diam.;

sepals spreading in staminate, erect in pistillate, enclosing flower or fruiting head;

filaments club-shaped, longer than anthers, pubescent; pistillate pedicellate, without ring of sterile stamens.

Chromosome number

unknown.

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.

heads 0.7–1.2 cm diam.;

achenes oblanceoloid, abaxially keeled, 2–3 × 1.4–2.1 mm, beaked;

faces not tuberculate, wings absent, glands 0–1;

beak lateral, erect, 0.2–0.6 mm.

2n

= 22.

Sagittaria latifolia

Sagittaria sanfordii

Phenology Flowering summer–fall. Flowering summer (Jul–Sep).
Habitat Wet ditches, pools, and margins of streams and lakes Ditches, streams, and lake margins
Elevation 0–1500 m (0–4900 ft) 10–300 m (0–1000 ft)
Distribution
from FNA
AL; AR; CA; CO; CT; DC; DE; FL; GA; IA; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; NC; ND; NE; NH; NJ; NY; OH; OK; PA; RI; SC; SD; TN; TX; VA; VT; WI; WV; AB; BC; MB; NB; NS; ON; PE; QC; SK; c Mexico; s Mexico; Central America (Guatemala); South America (Colombia, Ecuador, Venezuela)
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[BONAP county map]
Discussion

Sagittaria latifolia has been divided into numerous species and varieties. It was divided into two varieties, based upon the presence of pubescence over the entire vegetative plant (C. Bogin 1955; K. Rataj 1972). We have examined numerous specimens and found that many from the southeastern United States are pubescent; we believe that this character alone is insufficient for recognition of the varieties.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Of conservation concern.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 22. FNA vol. 22.
Parent taxa Alismataceae > Sagittaria Alismataceae > Sagittaria
Sibling taxa
S. ambigua, S. australis, S. brevirostra, S. cristata, S. cuneata, S. demersa, S. engelmanniana, S. fasciculata, S. filiformis, S. graminea, S. guayanensis, S. isoetiformis, S. kurziana, S. lancifolia, S. longiloba, S. montevidensis, S. papillosa, S. platyphylla, S. rigida, S. sanfordii, S. secundifolia, S. subulata, S. teres
S. ambigua, S. australis, S. brevirostra, S. cristata, S. cuneata, S. demersa, S. engelmanniana, S. fasciculata, S. filiformis, S. graminea, S. guayanensis, S. isoetiformis, S. kurziana, S. lancifolia, S. latifolia, S. longiloba, S. montevidensis, S. papillosa, S. platyphylla, S. rigida, S. secundifolia, S. subulata, S. teres
Synonyms S. latifolia var. obtusa, S. latifolia var. pubescens, S. ornithorhyncha, S. planipes, S. pubescens, S. viscosa
Name authority Willdenow: Sp. Pl. 4(1): 409. (1805) Greene: Pittonia 2: 158. (1890)
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