Chrysosplenium americanum

Schweinitz ex Hooker
Fl. Bor.-Amer. 1: 242. 1832 ,.
Common names: American golden-saxifrage water-mat or carpet dorine d’Amérique
Endemic
Treatment appears in FNA Volume 8. Treatment on page 72. Mentioned on page 71.

Stolons white or tan, 0.3–1 mm diam., glabrous. Flowering stems repent, decumbent, or ascending, branching in distal 1/4–1/2, 4–30 cm, glabrous. Leaves opposite, sometimes alternate distally, membranous. Stolon leaves: petiole 1–4 mm, glabrous; blade ovate to depressed-ovate, round, or flabellate, 2.5–15 × 2–10(–20) mm, base attenuate to cordate, margins subentire or 5–7(–9)-crenate or -crenulate, not purple-spotted, glabrous, surfaces glabrous abaxially and adaxially. Cauline leaves 4–9; petiole absent or 0.1–4 mm, glabrous; blade ovate to depressed-ovate, round, or flabellate, 2.5–15 × 2–10(–20) mm, base attenuate to cordate, margins 5–7(–9)-crenate or -crenulate, glabrous, surfaces glabrous abaxially and adaxially. Inflorescences terminal or axillary solitary flowers or 2–10-flowered, open cymes; bracts green, not purple-spotted, foliaceous, ovate to flabellate, 2–7 × 2–7 mm, margins subentire or 5–7-crenate or -crenulate. Pedicels absent or 0.1–0.8 mm. Flowers: hypanthium green, not purple-spotted, turbinate, 0.9–1.8 × 1.4–2.6 mm, glabrous; sepals spreading to erect, green, greenish yellow, or greenish red, not purple-spotted or purplish brown-spotted distally, broadly triangular or broadly ovate to nearly round, 1.3–1.8 × 0.9–1.6 mm, apex obtuse to rounded; nectary disc conspicuous, green or purple, 8-lobed; stamens 4–8, 0.5–0.9 mm; anthers purple, red, or orange, 0.2–0.3 × 0.4–0.5 mm; styles 0.2–0.6 mm. Seeds 6–16, dark brown, spheroid to ovoid, (0.5–)0.6–0.8 mm, puberulent. 2n = 18, 24.


Phenology: Flowering Mar–Jul.
Habitat: Marshy ground, streamsides, seeps, springs, swampy woods
Elevation: 0-1500 m

Distribution

V8 140-distribution-map.gif

N.B., N.S., Ont., P.E.I., Que., Conn., Del., Ga., Ind., Maine, Md., Mass., Mich., Minn., N.H., N.J., N.Y., N.C., Ohio, R.I., S.C., Tenn., Vt., Va., W.Va., Wis.

Discussion

Selected References

None.

Lower Taxa

None.

... more about "Chrysosplenium americanum"
Craig C. Freeman +  and Nicholas D. Levsen +
Schweinitz ex Hooker +
American golden-saxifrage +, water-mat or +, carpet +  and dorine d’Amérique +
N.B. +, N.S. +, Ont. +, P.E.I. +, Que. +, Conn. +, Del. +, Ga. +, Ind. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, R.I. +, S.C. +, Tenn. +, Vt. +, Va. +, W.Va. +  and Wis. +
0-1500 m +
Marshy ground, streamsides, seeps, springs, swampy woods +
Flowering Mar–Jul. +
Fl. Bor.-Amer. +
Chrysosplenium americanum +
Chrysosplenium +
species +