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1 Petals white with triangular red blaze (rarely entirely white or pinkish); anther sacs lavender to white, dehiscence extrorse; fruit a red berry; leaves long- acuminate; [of acidic sites in the Mountains, generally strongly associated with either Pinus, Tsuga, Picea, Rhododendron, or other heaths]; [genus Trillidium] |
1 Petals white to deep pink, lacking a red blaze; anther sacs yellow, dehiscence introrse; fruit a white to greenish-white, fleshy, irregularly dehiscent capsule; leaves obtuse to acute (or somewhat acuminate in T. grandiflorum); [of less distinctly acidic sites, collectively widespread in our area]. |
2 Pedicel declined below the leaves (rarely erect); sepals arcuate- recurved; anthers irregularly twisted outward; pollen egg-yolk yellow; [subgenus Delostylis] |
2 Pedicel inclined above leaves to strictly erect; sepals not arcuate- recurved; anthers erect, regular; pollen light yellow (richer yellow in T. grandiflorum). |
3 Sepals narrower than the petals, acute; anthers white to greenish-white between the anther sacs; leaves obtuse, acute, or acuminate; pedicel somewhat angled from the vertical. |
4 Ovary obscurely 3- lobed; leaves < 5 cm long, blue-green, obtuse; [subgenus Callipetalon] |
4 Ovary sharply 6-angled (- winged); leaves > 5 cm long, green, acute to acuminate. |
5 Petals obovate, tightly rolled at base, abruptly flared near the apex; leaves broadly elliptic, acuminate; style minute, < 1.0 mm long; [subgenus Callipetalon] |
5 Petals elliptic, loose, gradually separating; leaves ovate, acute; style conspicuous, > 1.5 mm long; [subgenus Delostylis] |
3 Sepals about as broad as the petals or broader, obtuse; leaves obtuse; anthers purplish-green between anther sacs; pedicel erect through fruiting; [ Trillium pusillum complex of subgenus Delostylis]. |
6 Leaves with stomates on the upper surface, appearing farinose; [of n. GA] |
7 Leaves linear, > 4× as long as wide; [of n. GA] |
7 Leaves ovate or elliptic, not linear, < 4× as long as wide; [of sw. AR, nw. LA and e. TX] |
6 Leaves without stomates on the upper surface, appearing glabrous. |
8 Pedicels < 10 (-12) mm long. |
9 Pedicels (0-) 0.5-1.0 mm long; leaves (1.5-) 2.0-2.4 (-2.9)× as long as broad; leaves (14-) 15-20 (-22.5) mm wide; filaments (4.5-) 4.6-5.8 (-8) mm long; [of upland forests of Mountains of w. VA and e. WV] |
9 Pedicels (0.5-) 1.0-6.6 (-11) mm long; leaves (2.1-) 2.5-3.8 (-6)× as long as broad; leaves (6-) 10-17 (-25) mm wide; filaments (2.5-) 3-5 (-6.5) mm long; [of wetland forests]. |
10 Anthers (3.2-) 4.5-6 (-7) mm long; stamens (5.7-) 8.4-10.9 (-12.5) mm long; stigmas (1-) 2.1-3 (-5) mm long; leaves elliptic; [of the outer Coastal Plain of e. MD, e. VA, and ne. NC] |
10 Anthers (2.5-) 2.7-4.8 (-6.8) mm long; stamens (5.7-) 6-9.2 (-13.2) mm long; stigmas (1-) 1.2-2.5 (-4.7) mm long; leaves ovate; [of the upper Coastal Plain and Piedmont of ne. NC, se. VA, and Mountains of sw. VA]. |
11 Pedicels (0.5-) 1-2.1 (-7) mm long; stamens (6-) 7.5-9.2 (-11) mm long; stigmas (1-) 2-2.5 (-4.7) mm long; [of upper Coastal Plain of e.VA] |
11 Pedicels (1.2-) 1.8-6.6 (-11) mm long; stamens (5.7-) 6-7.6 (-13.2) mm long; stigmas (1-) 1.2-2 (-2.5) mm long; [of Piedmont to edge of upper Coastal Plain of ne. NC] |
8 Pedicels 10-56 mm long. |
12 Leaves ascending; sepals ca. 1.4× as long as the petals; [of sphagnum bogs in the s. SC sandhills] |
12 Leaves horizontal to declining; sepals 0.9-1.1× as long as the petals. |
13 Leaves narrower, (1.9-) 3-4.1 (-5.6)× as long as wide; pedicels (23-) 25-33 (-56) mm long; [of calcareous savannas and swamps] |
13 Leaves broader, (2-) 2.7-3.4 (-5.5)× as long as wide; pedicels (7-) 13-30 (-45) mm long. |
14 Leaves ovate, acute; sepals (14-) 22-30 (-41) long, (4-) 6-11 (-17) mm wide, (2-) 3-4.3 (-5.6)× as long as wide; [generally of upland rocky slopes] |
14 Leaves elliptic, rounded; sepals (13-) 18-25 (-30) long, (4-) 6-8 (-12) mm wide, (1.8-) 2.7-3.1 (-4)× as long as wide; [generally of swamps and floodplains] |