Trillium viride Beck var. luteum (Muhl.) Gleason
Trillium luteum (Muhl.) Harbison
Yellow trillium, yellow wakerobin
Wood lily is native to the southeastern United States.
Plants: 1-4 round flowering stems, 6–16″ (14–40 cm) tall.
Leaves: A whorl of three leaves forms atop each stem, each leaf facing straight upward, with a single flower emerging from the center. The flower is connected directly to the leaves. Leaves are oval in shape, 2½–7 ⨉ 2½–3½″ (6.5–17 ⨉ 6.5–9.8 cm), wider at the base, tapering to pointed tips, and with even edges.
Flowers: Erect, looking a little like a candle flame, ¾–1¾ ⨉ ~5/16″ (2.2–4.7 cm ⨉ 8–9 mm), and smells like lemons. Three small specialized leaves (”bracts”) lie flat below the flower.
Fruits: Green to greenish white, occasionally with dark streaks, roughly oval, 6-angled, 1¼ ⨉ ¾″ (3.5 ⨉ 2 cm).
Habitats: Moist soils especially over calcareous rocks in woodland settings or along streams.
See also this Trillium comparison table.
Online References:
Trillium cuneatum Raf. var. luteum (Muhl.) H.E. Ahles
Trillium viride Beck var. luteum (Muhl.) Gleason
Trillium viride Beck var. luteum (Muhl.) Gleason
5/22/2010 · Garden in the Woods, Framingham, Massachusetts · ≈ 10 × 11″ (26 × 28 cm) 
| Kingdom | Plantae | Plants, but not fungi, lichens, or algae (from Stearn's Botanical Latin) |
| Subkingdom | Tracheobionta | Vascular plants—plants with a “circulatory system” for delivering water and nutrients |
| Division | Magnoliophyta | Flowering plants, also known as angiosperms |
| Class | Liliopsida | Monocots (plants with a single seed leaf); includes the lily family |
| Subclass | Liliidae | Includes lilies, orchids, and many others |
| Order | Liliales | Includes lilies, tulips, trilliums, greenbriars, and others |
| Family | Melanthiaceae | Trillium family |
| Genus | Trillium | “Three-petaled lily” |
| Species | luteum | Latin for “yellow” |
Trillium luteum description by Thomas H. Kent, not updated.
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