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illscented wakerobin, southern nodding trillium

green trillium, Ozark green trillium, Ozark trillium, tapertip wakerobin

Rhizomes

short, thick, tapered to point distally.

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

Scapes

1–3, round in cross section, 1.5–4 dm, robust, glabrous.

1–3, round in cross section, 2–5 dm, ± stout, glabrous to scabrous.

Bracts

sessile to subsessile;

blade bright green, veins not engraved, rhombic, broader than long, 6–15 × 6–16 cm, not glossy, base attenuate, apex acuminate.

touching ground in early anthesis or not at all, sessile;

blade dark green, obscurely marked with few–many darker blotches (very rarely unmottled), mottling becoming obscure with age, few or no stomates adaxially, ovate-elliptic to broadly so, 8.5–14 × 6.8–9 cm, apex acuminate.

Flower

strongly recurved below bracts;

sepals shorter than petals and somewhat obscured by them, spreading, green, very rarely streaked with red, lanceolate-elliptic, 15–40 × 7–17 mm, margins entire, apex acuminate;

petals recurving in distal 1/2 in most forms (forms from Alabama with petals slightly narrower and strongly recurved just above base), white, rarely 2-colored with base rose or dark purple and white, adaxial veins conspicuous, broadly ovate-elliptic, 2.5–5 × 0.8–3.5 cm, heavy-textured, margins entire, without undulations, apex abruptly acuminate;

stamens ± straight, 8–18 mm;

filaments deep purple, 2–8 mm, slender;

anthers ± straight, dark purple, 12–16 mm, thin, dehiscence introrse;

connectives not extended beyond anther sacs;

ovary prominent, purple-streaked or maroon distally or throughout, flask-shaped, 6-angled, 14–17 mm, widely attached at base;

stigmas recurved, distinct, dark purple, not lobed adaxially, subulate, 2–5 mm, fleshy;

pedicel strongly recurved beneath bracts, 1–7+ cm.

erect, odor, if present, spicy or musty;

sepals displayed above bracts, widely spreading, green or variously purple marked, lanceolate, 38–60 × 5–12 mm, margins entire, apex acute;

petals long-lasting, erect, ± connivent, ± concealing stamens and ovary, purplish black on claw, greenish to yellow-green distally, sometimes all dark purple, occasionally slightly twisted, linear to narrowly spatulate, 4–8 × 0.8–1.2 cm, thick-textured, base slightly thickened and clawed, margins entire, apex rounded, lacking nipple;

stamens erect, connivent (clustered together, leaning upon each other), 16–25 mm;

filaments olive or purplish brown, 2.5–5 mm, very slender, widened basally;

anthers erect, straight or slightly incurved, olive-brown, 13–20 mm, ± slender, dehiscence latrorse;

connectives brownish, barely extending beyond anther sacs;

ovary pale greenish white basally, purplish distally, ovoid, 6-angled, 5.5–10 mm;

stigmas erect, divergent-recurved, distinct, purplish abaxially, sessile, almost linear, 6–10 mm, ± equaling ovary, ± not fleshy, very slightly widened basally.

Fruits

baccate, dark reddish purple, fragrance faintly of fruit, ovoid to orbicular, 1.7 × 2 cm, fleshy, juicy.

dark purplish green or green, odor unreported, ovoid, obscurely angled, with remains of persistent stigma, 0.7–1.5 cm, pulpy, not juicy at time of separation from receptacle.

2n

= 10.

Trillium rugelii

Trillium viridescens

Phenology Flowering mid spring (mid Apr–May). Flowering spring (early Apr–mid May).
Habitat Deciduous forest hillsides and coves, inner piedmont, mostly in alluvial soils along stream banks and flats Deciduous forests, usually quite rich, on banks, bluffs, talus slopes, floodplain alluvium, with cane (Arundinaria) or on sloping banks just above normal flood levels in heavy, clayey soils, with common spring ephemerals
Elevation 200–700 m (700–2300 ft) 100–400 m (300–1300 ft)
Distribution
from FNA
AL; GA; NC; SC; TN
[WildflowerSearch map]
[BONAP county map]
from FNA
AR; KS; MO; OK; TX
[WildflowerSearch map]
[BONAP county map]
Discussion

The Alabama plants of Trillium rugelii differ from those in the Great Smoky Mountains region in having usually smaller bracts, narrower ovate petals strongly recurved from the base, and strongly fragrant flowers with the odor of old-fashioned garden roses. The anther color and structure are the same as in the mountain form. Hybrids between T. vaseyi and T. rugelii occur frequently.

Trillium rugelii has been much confused with T. cernuum in past floras, and it is the taxon upon which most reports of T. cernuum south of Virginia are based.

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

Of conservation concern.

J. D. Freeman (1975) considered that Trillium viridescens intergrades with T. gracile in northeastern Texas and stated that these putative intergrades produce purple petals, but purple-petaled forms also occur in Arkansas, far from the influence of T. gracile.

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

Source FNA vol. 26, p. 103. FNA vol. 26, p. 117.
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. 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. 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. 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
Name authority Rendle: J. Bot. 39: 331, plate 426, fig. B1901 (as rugeli) Nuttall: Trans. Amer. Philos. Soc., n. s. 5: 155. (1837)
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