Flora of North America species comparison

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Sagittaria sanfordii

Sanford's arrowhead, valley arrowhead
Habit Herbs, perennial, to 130 cm; rhizomes present; stolons absent; corms present.
Leaves

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

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 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 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.

Sagittaria sanfordii
Phenology Flowering summer (Jul–Sep).
Habitat Ditches, streams, and lake margins
Elevation 10–300 m (0–1000 ft)
Distribution
from FNA
CA
[BONAP county map]
Discussion

Of conservation concern.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 22.
Parent taxa 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. latifolia, S. longiloba, S. montevidensis, S. papillosa, S. platyphylla, S. rigida, S. secundifolia, S. subulata, S. teres
Name authority Greene: Pittonia 2: 158. (1890)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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