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birthwort, red trillium, red wakerobin, stinking Benjamin, stinking willie, wake-robin

mottled wakerobin, pale yellow trillium, small yellow toadshade

Rhizomes

short, thick, praemorse.

horizontal, brownish, short or somewhat compressed-thickened, bulblike, praemorse, not brittle.

Scapes

1–2, often with numerous offsets forming heavy clumps, round in cross section, 1.5–6 dm, ± robust, glabrous.

1–2, 1–2.2 dm, slender, essentially glabrous.

Bracts

sessile;

blade bright green, lacking dark pigmentation, major veins prominent, broadly rhombic to ovate-rhombic, 5–20 × 5–20 cm, about as broad as long, widest near middle, base attenuate, apex acuminate.

held well above ground, sessile;

blade mottled dark green over lighter green, mottling fading or blurring with time, ovate, elliptic to almost circular, 6–13 × 4–7 cm, apex acute to acuminate.

Flower

erect, ascending, or proximal to but above bracts, odor fetid, like a wet dog;

perianth open, flat;

sepals flat to sulcate apically, green, often streaked or overlain with maroon, occasionally entirely dark maroon, lanceolate-acuminate, 10–50 mm, equaling petals, ± 1/2 petal width, texture leafy, margins entire, apex acuminate;

petals spreading, carried in same plane as sepals or ascending slightly, dark reddish brown, maroon, purple, or white, sometimes pale yellow, major adaxial veins prominent and appearing somewhat engraved, usually flat, lanceolate, ovate-lanceolate, or occasionally ovate, 1.5–5 × 1–3 cm, 2 times sepal width, widest near base, heavy-textured, apex acuminate;

stamens erect to slightly recurved, 5–15 mm;

filaments white, pinkish, or dark purple, ± equaling anthers, but variable within local populations, thin;

anthers erect or weakly recurving, dark maroon, grayish maroon, or yellowish, strongly yellow when pollen exposed, 5–12 mm, dehiscence introrse;

ovary dark purple to maroon, even in white-flowered forms, ovoid, elliptic to globose, 6-angled, angles forming very low ridges when fruit is ripe, 5–10 mm, broadly attached at base;

stigmas recurved, distinct, dark purple, not lobed adaxially, subulate, short, 3–7 mm, ca. 1/2 or less length of ovary at anthesis, fleshy;

pedicel straight, erect, or somewhat declined but not strongly recurved below bracts, 1–10+ cm.

erect, odor faintly pleasant, resembling sweetshrub (Calycanthus sp.);

sepals displayed above bracts, spreading, green, oblong-lanceolate, shorter than petals, 20–30 × 7–19 mm, margins entire, apex acute;

petals long-lasting, erect, ± connivent, ± concealing stamens and ovary to spreading distally, soft pale sulfur-yellow, fading to ± cream, sometimes slightly spirally twisted, widely spatulate, clawed basally, 2.2–5 × 0.9–1.5 cm, thick-textured, margins entire, often upraised adaxially, at least 1 petal with apex strongly apiculate, nipplelike, others with apex apiculate-acuminate;

claw green, sometimes obscurely marked or mottled with purple, broadly cuneate;

stamens incurved-erect, 8–15 mm;

filaments purple, 1–2.5 mm;

anthers erect, straight or arcuate, brown, 6.5–14 mm, dehiscence introrse-latrorse;

connectives straight, extending 1–2 mm beyond anthers;

ovary purplish, ovoid, 6-ridged, 2.5–8.5 mm;

stigmas divergent to erect, distinct, purplish white, subulate, short, 2–6 mm, ± fleshy.

Fruits

dark maroon, weakly fragrant of fruit, ± globose to slightly pyramidal, 1–1.6 × 1–1.5 cm, juicy.

baccate, greenish white, subglobose, weakly 6-winged, 1–5 × 1 cm, pulpy or mealy, not juicy.

2n

= 10.

= 10.

Trillium erectum

Trillium discolor

Phenology Flowering spring (mid Apr–early May).
Habitat Rather acidic to clearly circumneutral or basic soils of mixed deciduous forests, often under oaks, near Rhododendron thickets, or near tangles of Leucothoë on moist stream banks, slopes near streams
Elevation 100–200 m (300–700 ft)
Distribution
from USDA
e North America
[WildflowerSearch map]
[BONAP county map]
from FNA
GA; NC; SC
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

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

Trillium discolor occurs only in the upper drainage of the Savannah River, but it is locally frequent within its limited range.

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

Key
1. Petals usually red, maroon, or dark purple.
var. erectum
1. Petals white.
var. album
Source FNA vol. 26, p. 98. FNA vol. 26, p. 109.
Parent taxa Liliaceae > Trillium > subg. Trillium Liliaceae > Trillium > subg. Phyllantherum
Sibling taxa
T. albidum, T. angustipetalum, T. catesbaei, T. cernuum, T. chloropetalum, T. cuneatum, T. decipiens, T. decumbens, T. discolor, T. flexipes, T. foetidissimum, T. gracile, T. grandiflorum, T. kurabayashii, T. lancifolium, T. ludovicianum, T. luteum, T. maculatum, T. nivale, T. ovatum, T. parviflorum, T. persistens, T. petiolatum, T. pusillum, T. recurvatum, T. reliquum, T. rivale, T. rugelii, T. sessile, T. simile, T. stamineum, T. sulcatum, T. underwoodii, T. undulatum, T. vaseyi, T. viride, T. viridescens
T. albidum, T. angustipetalum, T. catesbaei, T. cernuum, T. chloropetalum, T. cuneatum, T. decipiens, T. decumbens, T. erectum, T. flexipes, T. foetidissimum, T. gracile, T. grandiflorum, T. kurabayashii, T. lancifolium, T. ludovicianum, T. luteum, T. maculatum, T. nivale, T. ovatum, T. parviflorum, T. persistens, T. petiolatum, T. pusillum, T. recurvatum, T. reliquum, T. rivale, T. rugelii, T. sessile, T. simile, T. stamineum, T. sulcatum, T. underwoodii, T. undulatum, T. vaseyi, T. viride, T. viridescens
Subordinate taxa
T. erectum var. album, T. erectum var. erectum
Name authority Linnaeus: Sp. Pl. 1: 340. (1753) T. Wray ex Hooker: Bot. Mag. 58: plate 3097. (1831)
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