List of Common Trillium Species
Species P/S E/N Color Scent Leaves Key Concept
Trillium grandiflorum P 1-3 E White - dark green petals overlap
Trillium nivale P 0.5 E White - dark green ovary 3 lobed
Trillium erectum P 1-4 E Red wet dog bright green flowers open flat
Trillium erectum f. album P 1-4 E White wet dog bright green flowers open flat
Trillium cernuum P 0.5-1 N White fruity green petals recurved behind sepals
Trillium flexipes P 1.5-5 N White fruity green ovary white
Trillium catesbaei P 1-1.5 N Pink - green anthers curved
Trillium vaseyi P 1.5-3 N Maroon sweet green ovary maroon
Trillium luteum Sessile - Yellow lemon mottled sepals above leaves
Trillium viride Sessile - Green fruity faintly
mottled
petals narrow
anthers introse (facing ovary)
Trillium recurvatum Sessile - Maroon - mottled sepals reflexed to stem
Trillium stamineum Sessile - Maroon - mottled petals narrow twisted
anthers extrose (facing outward)
Trillium cuneatum Sessile - Maroon - mottled green sepals veined maroon
Trillium underwoodii Sessile - Maroon fetid mottled leaves touch ground
Trillium sessile Sessile - Maroon spicy bluish green anther prolonged above sac


Key to terms:
P/S - Pedicellate or Sessile
Pedicellate means flower is borne on stalk (stalk is called a pedicel). Sessile means flower is attached directly to the leaves (these leaves are called bracts). Length of Pedicel in inches.
E/N - Erect or Nodding
Erect means flower held upright, flower above the leaves. Nodding means flower pedicel angled downward, flower falls below the leaves.
Color - Petal Color
Petal Color means either white, yellow, dull red, or maroon.
Scent - Fragrance of flower or fruit
Leaves - Color of Leaves
Mottled arrangement of light green, dark green, and/or maroon green section patterns on leaf.


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