Echinodorus berteroi

(Sprengel) Fassett

Rhodora 57:139. 1955

Basionyms: Alisma berteroi Sprengel Syst. Veg. 2: 163. 1825
Synonyms: Echinodorus berteroi var. lanceolatus (Engelmann ex S. Watson & J. M. Coulter) Fassett Echinodorus rostratus Echinodorus rostratus var. lanceolatus Engelmann ex S. Watson & J. M. Coulter
Treatment appears in FNA Volume 22.

Herbs, annual or perennial, stout, to 70 cm; rhizomes present. Leaves emersed or submersed; submersed leaves mostly absent; petiole terete to triangular, 2–36 cm; blade with translucent markings present as distinct lines, elliptic, lanceolate, or ovate, 2.6–15.5 ´ 0.5–20 cm, base truncate or occasionally cordate to tapering. Inflorescences racemes, rarely panicles, of 1–9 whorls, each 1–3(–4)-flowered, erect, 1.5–40 ´ 1.7–50 cm, not proliferating; peduncles 3–5-ridged, 2.1–57 cm; rachis triangular; bracts distinct, lanceolate, 0.3–2.5 cm, coarse, margins scarious; pedicels spreading to ascending, 0.6–2.8 cm. Flowers 6–11 mm wide; sepals spreading to recurved, 9–13-veined, veins not papillate; petals clawed; stamens 9–15; anthers versatile; pistils 45–200. Fruits oblanceolate, plump, 3–5-ribbed, abaxially 2-keeled, 0.9–3.2 ´ 0.6–2.5 mm; glands 1–2; beak terminal, 0.6–1.3 mm. 2n = 22.


Phenology: Flowering mid summer–fall.
Habitat: Clay soils of wet ditches, streams, and shallow ponds
Elevation: 0–800 m

Distribution

V22 372-distribution-map.jpg

Ark., Calif., Fla., Ill., Iowa, Kans., La., Mo., Nebr., Nev., Ohio, Okla., S.Dak., Tex., Utah, Wis., Mexico, West Indies, South America.

Discussion

Echinodorus berteroi is an extremely easy species to recognize when in fruit. The elongated beaks of the fruits project upward, giving the fruiting head an echinate appearance. The generic name, in fact, came from the fruiting head of this species.

Selected References

None.

Lower Taxa

None.

... more about "Echinodorus berteroi"
Robert R. Haynes +  and C. Barre Hellquist +
(Sprengel) Fassett +
Alisma berteroi +
Ark. +, Calif. +, Fla. +, Ill. +, Iowa +, Kans. +, La. +, Mo. +, Nebr. +, Nev. +, Ohio +, Okla. +, S.Dak. +, Tex. +, Utah +, Wis. +, Mexico +, West Indies +  and South America. +
0–800 m +
Clay soils of wet ditches, streams, and shallow ponds +
Flowering mid summer–fall. +
Echinodorus berteroi var. lanceolatus +, Echinodorus rostratus +  and Echinodorus rostratus var. lanceolatus +
Echinodorus berteroi +
Echinodorus +
species +