Erythronium americanum

Ker Gawler

Bot. Mag. 28: plate 1113. 1808.

Common names: Yellow trout-lily érythrone d’Amérique
IllustratedEndemic
Treatment appears in FNA Volume 26. Treatment on page 161. Mentioned on page 154, 162, 163.

Bulbs ovoid, 15–28 mm; stolons 1–3, common, mostly on 1-leaved, nonflowering plants. Leaves 8–23 cm; blade green, irregularly mottled, elliptic-lanceolate to ovate or elliptic, ± flat, glaucous, margins entire. Scape 10–18 cm. Inflorescences 1-flowered. Flowers: tepals yellow, sometimes tinged light to dark purple-red abaxially, sometimes with reddish dots adaxially, strongly reflexed at anthesis, lanceolate, 20–33 mm, inner with small auricles; stamens 9–15 mm; filaments yellow, lanceolate; anthers yellow, chestnut-brown, or lavender; pollen yellow or brown; style deciduous or base forming small apiculum, greenish yellow, 5–11 mm, swollen distally or ± terete; stigma lobes erect or recurved, 1.5 mm. Capsules held erect or at least off ground at maturity, obovoid, 12–15 mm, apex rounded, truncate, or apiculate. 2n = 48.

Discussion

Varieties 2 (2 in the flora).

Erythronium americanum is a very common and widespread species, particularly in northeastern North America, becoming less frequent towards the southern and western limits of its range. Nonflowering plants far outnumber flowering ones in most populations because of their extensive stolon production. Plants with brown anthers have been called forma castaneum L. B. Smith.

Selected References

None.

Key

1 Capsule apex rounded, truncate, or short-apiculate; stigma lobes erect, not grooved; widespread in ne United States Erythronium americanum subsp. americanum
1 Capsule apex distinctly apiculate; stigma lobes recurved, grooved distally; n Alabama, Georgia, ne Mississippi, Tennessee Erythronium americanum subsp. harperi

"thicker" is not a number.

... more about "Erythronium americanum"
lavender +, chestnut-brown +  and yellow +
versatile +  and dorsifixed +
cordate +  and linear +
loculicidal +
Rounded (?) +  and Obovoid (?) +
1.2 cm12 mm <br />0.012 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Geraldine A. Allen +  and Kenneth R. Robertson +
Ker Gawler +
whorled +, opposite +  and alternate +
greenish yellow +
terete +  and swollen +
0.5 cm5 mm <br />0.005 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
reticulate-veined +  and parallel-veined +
mottled +  and green +
elliptic-lanceolate +  and ovate or elliptic +
6 cm60 mm <br />0.06 m <br /> (60 cm600 mm <br />0.6 m <br />) +
sheathing +  and involucrate +
tunicate +  and scaly +
additional +
1.5 cm15 mm <br />0.015 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
apiculate +  and truncate +
at-least +  and erect +
Yellow trout-lily +  and érythrone d’Amérique +
e North America +
lanceolate +
sessile +  and pedicellate +
erect +  and nodding +
unisexual +  and bisexual +
indehiscent +, septicidal +  and loculicidal +
obovoid +  and oblong +
membranaceous +  and leathery +
persistent +
8 cm80 mm <br />0.08 m <br /> (23 cm230 mm <br />0.23 m <br />) +
recurved +  and erect +
many;several +
zygomorphic +  and actinomorphic +
brown +  and yellow +
reddish +  and green +
elongating +
10 cm100 mm <br />0.1 m <br /> (18 cm180 mm <br />0.18 m <br />) +
wind-distributed +
1 +  and many +
Illustrated +  and Endemic +
many +  and few +
more sparingly without than those extensive vegetative reproduction +
adnate +  and free +
staminodial +
recurved +  and erect +
1 +  and several +
3-lobed +  and unlobed +
deciduous +
Erythronium americanum +
Erythronium +
species +
reddish dots;tinged light;dark purple-red +
distinct +
lanceolate +
2 cm20 mm <br />0.02 m <br /> (3.3 cm33 mm <br />0.033 m <br />) +
sepaloid +  and petaloid +
narrower +
lanceolate;ovate +
3 +  and 2 +