Trillium consists of herbaceous perennials that grow from rhizomes, characterized by upright stems topped with a whorl of ovate or diamond-shaped leaves. At the apex of each stem, one or more flowers may be found, either standing erect or nodding.

Trillium pusillum var. ozarkanum

Trillium pusillum var. pusillum

Trillium pusillum var. virginianum

Trillium recurvatum is a perennial plant that thrives in woodland environments, reaching heights of approximately 50 cm. It features upright stems topped with three elliptic leaves that exhibit a mottled green pattern, attached to short stalks. In spring, this species produces dark red flowers, though yellow blooms may also occur. The flowers have upright, curved petals and narrow green sepals that droop from the base, appearing just above the foliage.

Trillium recurvatum

Trillium reliquum

Trillium rivale is a herbaceous perennial that reaches a height of up to 12 cm. Each stem stands upright and features a whorl of three ovate leaves. At the top, a single flower blooms, measuring 3-4 cm across, displaying three ovate petals that are pinkish-white with purple speckling near the base.

Trillium rivale

Trillium rivale 'Del Norte'

Trillium rivale 'Verne Ahiers'

Trillium rivale 'Winifred Murray'

Trillium rivale (Purple Heart Group) 'Purple Heart'

Trillium rivale Purple Heart Group

Trillium rivale Reticulate-leaved Group

Trillium rivale Winifred Murray Group

Trillium rivale pink-flowered

Trillium rivale pink-spotted

Trillium rugelii is a perennial plant that forms clumps and grows up to 45 cm tall. It features upright stems topped with a whorl of three broad, oval leaves, each reaching lengths of up to 20 cm. The individual flowers, positioned beneath the leaves, display pointed green sepals, three creamy-white petals, and purple anthers.

Trillium rugelii

Trillium rugelii 'Orchard Pink'

Trillium rugelii Askival hybrids

Trillium rugelii pink-flowered

This perennial reaches a height of up to 30 cm and features whorls of wide, stalkless leaves that are deep green with pale silvery markings and hints of bronze-maroon. In late spring, upright, stalkless flowers in red-maroon emerge at the center of the leaf cluster.

Trillium sessile

Trillium sessile purple

Trillium simile is a herbaceous perennial that loses its leaves in winter and grows from rhizomes. It features wide, dark green leaves and produces large, flat white flowers adorned with overlapping petals, each showcasing a violet-purple center. These blooms emerge in mid to late spring.

Trillium simile

Trillium smallii

Trillium smallii var. alba

Trillium stamineum

Trillium sulcatum is a sturdy perennial found in woodland settings, reaching heights of approximately 70 cm. Each upright stem supports a trio of broad green leaves that feature elongated, pointed tips. In spring, the plant produces flowers with petals that curve backward, elevated on rigid stalks above the foliage. The flowers can be found in a range of colors, including dark red, purple, white, cream, or pale pink.

Trillium sulcatum

Trillium sulcatum cream-flowered

Trillium sulcatum white-flowered

Trillium sulcatum yellow-flowered

Trillium taiwanense

Trillium texanum

Trillium tschonoskii

Trillium tschonoskii f. violaceum

Trillium tschonoskii var. himalaicum

Trillium underwoodii

Trillium undulatum

Trillium vaseyi is a perennial plant that thrives in woodland environments, reaching heights of approximately 60 cm. Each upright stem supports a trio of diamond-shaped, deeply veined green leaves that can grow up to 20 cm in length. In spring, this species produces faintly fragrant, dark red flowers characterized by their backward-curving, spreading petals, which are positioned on short stems nestled beneath the foliage.

Trillium vaseyi

Trillium vaseyi f. album

Trillium vaseyi horizontal inflorescence

Trillium vaseyi large-flowered

Trillium viride

Trillium viridescens is a robust perennial that thrives in woodland environments, reaching heights of up to 60 cm. Its upright stems support clusters of three wide, mottled green leaves. In spring, slender green petals, occasionally marked with dark red at their bases, emerge directly above the foliage.

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