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fetid trillium, Mississippi River wakerobin, stinking trillium

bent trillium, declined trillium, drooping trillium, nodding wakerobin

Rhizomes

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

somewhat erect, thick, praemorse.

Scapes

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

1–several from single rhizome, round in cross section, 2–5 dm, glabrous.

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.

sessile;

blade medium green without red or maroon undertones, rhombic, 7–25 × 7–25 cm, frequently wider than long, base attenuate from just above middle, apex acuminate.

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.

flexed ca. 90° on summit of pedicel to face outward rather than upward, or variously carried on strongly declined pedicels;

sepals weakly recurved, green, lanceolate, 14–45 mm, shorter than or barely equaling petals, margins entire, apex acuminate;

petals flat or recurved in distal 1/2, creamy white, not 2-colored, veins conspicuously engraved, ovate-lanceolate to broadly ovate, 2–5 × 1–4 cm, texture heavy, margins entire, apex acute;

stamens large, ± erect, 9–23 mm;

filaments white, less than 1/2 anther length, thin;

anthers straight or very slightly recurving, creamy white or yellow, 5–18 mm, thick, dehiscence ± introrse;

ovary white, ovoid to flask-shaped, strongly 6-angled, 5–16 × 4–12 mm, widely attached basally;

stigmas recurved, distinct but closely grouped, white, not lobed adaxially, linear-subulate, short, thick, 4–13 mm, ± equaling ovary, fleshy;

pedicel stiffly erect, carried horizontally, or declined beneath bracts, rarely recurved, 4–12 cm.

Fruits

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

baccate, rosy red to purplish, fragrant of ripe fruit, ovoid to somewhat pyramidal at summit, strongly angled, 2–3.5 × 1–3 cm, very juicy at maturity.

2n

= 10.

Trillium foetidissimum

Trillium flexipes

Phenology Flowering late winter–early spring (early Mar [rarely Feb]--early Apr). Flowering spring (Apr–early Jun).
Habitat River bluffs, ravines, floodplains, low ground, rich woods, road shoulders, silts, sandy-alluvium, loess soils, drier upland oak and pine woods Rich wooded slopes, floodplains in deciduous forests, especially over limestone
Elevation 40–50 m (100–200 ft) 100–600 m (300–2000 ft)
Distribution
from FNA
LA; MS
[WildflowerSearch map]
[BONAP county map]
from FNA
AL; DE; IA; IL; IN; KY; MI; MN; MO; NY; OH; PA; SD; TN; VA; WI; WV; ON
[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.)

Although there are no named varieties of Trillium flexipes, many forms exist and at least one has been named, forma walpolei (Farwell) Fernald. F. W. Case and G. L. Burrows (1962) mapped the occurrence of forma walpolei for Michigan and found it to occur only along the contact zone between T. flexipes and T. erectum. F. W. Case and R. B. Case (1993) crossed typical T. erectum and T. flexipes to produce identical color variations as occur in these wild, mixed-species populations. I consider this form to be a hybrid expression. Some of the hybrids have petals colored proximally and white distally, superficially resembling T. undulatum. Dried specimens, when hastily examined, resemble T. undulatum superficially and probably account for reports of that species from locations near Ann Arbor, Michigan, and various places in Indiana and Illinois, all of which are well out of the range of T. undulatum.

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

Source FNA vol. 26, p. 110. FNA vol. 26, p. 99.
Parent taxa Liliaceae > Trillium > subg. Phyllantherum Liliaceae > Trillium > subg. Trillium
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. cuneatum, T. decipiens, T. decumbens, T. discolor, T. erectum, 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
Synonyms T. declinatum, T. gleasonii
Name authority J. D. Freeman: Brittonia 27: 31, fig. 7. (1975) Rafinesque: Autik. Bot., 133. (1840)
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