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fetid trillium, Mississippi River wakerobin, stinking trillium

bloody butcher, cuneate trillium, large toadshade, little sweet betsy, purple toadshade, sweet betsy, whip-poor-will flower

Rhizomes

horizontal, brownish, thick, short, praemorse, not brittle.

horizontal, brownish, short, thick, praemorse, not brittle.

Scapes

1–2, green to maroon, round in cross section, 0.8–2.8 dm, papillose basally.

1–5, 1.6–4.5 dm, smooth to rough near bract attachment.

Bracts

often carried quite horizontally, well above ground, sessile;

blade light green or bronze-green, strongly mottled in dark green with central light green stripe, mottling becoming obscure with age but less so than in most species, elliptic-ovate, rarely ± orbicular, 6.7–12 × 3.8–6 cm, not glossy, base evenly tapered to broad attachment, apex obtuse-acute.

held well above ground, sessile;

blade green to purplish green, weakly to strongly mottled, mottling becoming obscure with age, ovate, ovate-elliptic, occasionally ovate-orbicular with margins overlapping, 7–18.5 × 7–13 cm, usually widest below middle, not glossy, base ± rounded, margins of distal 1/3 convex-curved to apex, apex acuminate to acute.

Flower

borne directly on bracts, odor of putrid meat, especially when in strong sunlight;

sepals displayed above bracts, carried almost horizontally, green or green streaked with dark maroon, lanceolate, 16–40 × 4–6 mm, thick-textured, margins entire, apex acute;

petals long-lasting, erect, very gradually incurved from base to apex, ± connivent, ± concealing stamens and ovary, pinkish purple, light to reddish purple, brownish purple, rarely yellow, fading to brownish tones with age, not spirally twisted, not inrolling with age, veins not engraved, narrowly elliptic to linear-lanceolate, 2–5 × 0.3–0.5 cm, thick-textured, not glossy, margins entire, flat, acute at apex;

stamens relatively prominent, erect, 9–25 mm;

filaments dark maroon, 3–6 mm, dilated basally;

anthers straight, dark maroon-black, 8–15 mm, dehiscence introrse;

connectives straight, extended 1–1.5 mm beyond anther sacs;

ovary red-purple, ovoid, hexagonal in cross section, 5–12 mm, broadly attached;

stigmas erect, divergent-recurved, distinct, dark purple, subulate, nearly as long as ovary, fleshy.

borne upon bracts, erect, odor usually pleasant, faint, spicy, reminiscent of odor of bruised sweetshrub (Calycanthus) leaves, occasionally musty or unpleasant;

sepals widely spreading, variably green, purple-streaked to all purple, oblong-lanceolate, 27–60 × 7–13 mm, margins entire, apex rounded to acute;

petals long-lasting, erect, ± connivent, ± concealing stamens and ovary, maroon, maroon-purple, brownish purple, bronze, greenish purple, clear green, yellowish green, pale lemon yellow, or 2-colored, yellow distally with purple base, in occasional clones, flowers open or quickly fade to bright copper bronze, the particular color pattern is consistent from year to year, fading to browner tones with age except in yellow or green forms, not spirally twisted, shape quite variable across range, elliptic-obovate to oblanceolate, 4–7 × 0.9–2.7 cm, thick-textured, with widest portion at or above middle, narrowed to usually cuneate basally, not clawed, margins flat, entire, apex acute, rounded-acute to obtuse;

stamens erect, straight, brownish purple-green, 11–18 mm;

filaments brownish purple, 1.5–3.5 mm, widest at base;

anthers erect, straight, brownish gray, 7–14 mm, dehiscence latrorse or occasionally introrse;

connectives straight, scarcely (0.5 mm or less) if at all extended beyond anther sacs;

ovary maroon, ovoid to vase-shaped, weakly 6-angled or -ridged when mature, 12–15 mm;

stigmas erect, slightly diverging to spreading, distinct, purplish gray, linear-subulate to thickly subulate, 4–15 mm, fleshy.

Fruits

purplish brown, ovoid, 6-angled at least apically, fleshy.

green or with purple streaks, ovoid, very obscurely angled or angles no longer apparent, 2 × 1–1.5 cm, mealy or pulpy, fleshy, not juicy.

2n

= 10.

Trillium foetidissimum

Trillium cuneatum

Phenology Flowering late winter–early spring (early Mar [rarely Feb]--early Apr). Flower late winter–mid spring (early Mar–mid Apr).
Habitat River bluffs, ravines, floodplains, low ground, rich woods, road shoulders, silts, sandy-alluvium, loess soils, drier upland oak and pine woods Rich, mostly upland woods, especially limestone soils, also less calcareous sites, occasionally found in old fields, ditches, or coal-mine tailings
Elevation 40–50 m (100–200 ft) 50–400 m (200–1300 ft)
Distribution
from FNA
LA; MS
[WildflowerSearch map]
[BONAP county map]
from FNA
AL; GA; KY; MS; NC; SC; TN
[WildflowerSearch map]
[BONAP county map]
Discussion

Trillium foetidissimum seems tolerant of a wide range of soil moistures and types, from low, swampy woods to high, dry bluffs and ravine slopes. This is the only Trillium known to occur within its Louisiana range (J. D. Freeman 1975). Freeman considered it to be closely related to T. sessile.

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

Trillium cuneatum has escaped locally and become established in Michigan and other states. It is most frequent on the Ordovician limestone-derived soils of southern Kentucky and Tennessee, and is perhaps the most vigorous and certainly the largest of the eastern sessile trilliums. Numerous, mostly unnamed color forms occur. Plants from the lower piedmont of Georgia, Alabama, and Mississippi, considered by most botanists to be of this species, have smaller, narrower petals than specimens from northeastern Alabama northward to Kentucky, and they are therefore sometimes difficult to place with certainty.

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

Source FNA vol. 26, p. 110. FNA vol. 26, p. 108.
Parent taxa Liliaceae > Trillium > subg. Phyllantherum 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. erectum, T. flexipes, 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. decipiens, T. decumbens, T. discolor, 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
Name authority J. D. Freeman: Brittonia 27: 31, fig. 7. (1975) Rafinesque: Autik. Bot., 133. (1840)
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