Sessile Trillium have leaves mottled, flowers terminal and petals are more or less erect. Three subgroups (Freeman) are recurvatum group I (recurved sepals and slender rhizomes), sessile group II (long anther connectives, sharp angle ovaries and thick compact rhizomes) and maculatum group III (lateral and short anthers).

As you will notice below I am Thankful to a number of trillium lovers which has contributed pictures for all to see. We are still in need for pictures of other species, varieties, forms, and exotic trillium cultivars. You are invited to provide trillium species or cultivar images so we might eventually display all species, varieties and forms and exotic cultivars. I am especially thankful to Carl Denton for his images and cultivar descriptions. In time I hope to complete the description with each picture. Feel free to input

Please email any trillium submittals to ... <harold@trilliumresearch.org>. You may submit, if you wish, pictures or other large files on a CD-ROM to: Holmes Trillium Research, 17 Heather Street, Lacey's Spring, Alabama 35754.

Scientific Name: ALBIDUM
Common Name(s): Fragrant White Toadshade
Varieties, Forms): None Known
Location: Western USA
Description: Group III.

Photograph: Susan Farmer

Scientific Name: ANGUSTIPETALUM
Common Name(s): NARROW PETALED TRILLIUM, SLENDER PETALED TOADSHADE
Varieties, Forms): dark red-purple and yellow forms
Location: Western USA
Description: Group III. Readily distinguished by basally attenuate bracts, linear,dark purple petals, and stamens and carpels nearly equal in length(Freeman)

Photograph: Stewart Preston

Scientific Name: ANGUSTIPETALUM, yellow form
Common Name(s): NARROW PETALED TRILLIUM, SLENDER PETALED TOADSHADE
Varieties, Forms): dark red-purple and yellow forms
Location: Western USA
Description: Group III.

Photograph: Stewart Preston

Scientific Name: CHLOROPETALUM, var. chloropetalum
Common Name(s): Westurn Purple Toadshade
Varieties, Forms): var. chloropetalum, var. giganteum, 'golden leaf', 'white double', "Val Mulvihill", yellow.
Location: Western USA
Description: Group III,

Photograph: Carl Denton

Scientific Name: CHLOROPETALUM, var. giganteum
Common Name(s): Westurn Purple Toadshade
Varieties, Forms): var. chloropetalum, var. giganteum, 'golden leaf', 'white double', "Val Mulvihill", yellow.
Location: Western USA
Description: Group III,

Photograph: Carl Denton

Scientific Name: CHLOROPETALUM, 'golden leaf'
Common Name(s): Westurn Purple Toadshade
Varieties, Forms): var. chloropetalum, var. giganteum, 'golden leaf', 'white double', "Val Mulvihill", yellow.
Location: Western USA
Description: Group III,

Photograph: Carl Denton - Large image

Scientific Name: CHLOROPETALUM, "Val Mulvihill"
Common Name(s): Westurn Purple Toadshade
Varieties, Forms): var. chloropetalum, var. giganteum, 'golden leaf', 'white double', "Val Mulvihill", yellow.
Location: Western USA
Description: Group III, T.c. 'Val Mulvihill' A deepest yellow petal with a deep red at its base. Good grower and forms offsets regularly. A chance seedling in South Canterbury, New Zealand.

Photograph: Carl Denton - Large image

Scientific Name: CHLOROPETALUM, yellow form
Common Name(s): Westurn Purple Toadshade
Varieties, Forms): var. chloropetalum, var. giganteum, 'golden leaf', 'white double', "Val Mulvihill", yellow.
Location: Western USA
Description: Group III,

Photograph: Carl Denton

Scientific Name: CHLOROPETALUM, 'white double'
Common Name(s): Westurn Purple Toadshade
Varieties, Forms): var. chloropetalum, var. giganteum, 'golden leaf', 'white double', "Val Mulvihill", yellow.
Location: Western USA
Description: Group III,

Photograph: Carl Denton

Scientific Name: CUNEATUM, f. cuneatum
Common Name(s): Whippoorwill, Sweet Betsy, Large Toadshade
Varieties, Forms): f. cuneatum, f. luteum, "aff ludo"
Location: Eastern USA
Description: GroupIII, Most diverse species, leaves moderately mottled. Colors include maroon, yellow, green, and bronze.

Photograph: Harold Holmes

Scientific Name: CUNEATUM, f. luteum
Common Name(s): Whippoorwill, Sweet Betsy, Large Toadshade
Varieties, Forms): f. cuneatum, f. luteum, "aff ludo"
Location: Eastern USA
Description: GroupIII, Most diverse species, leaves moderately mottled. Colors include maroon, yellow, green, and bronze.

Photograph: Harold Holmes

Scientific Name: CUNEATUM, "aff. ludo"
Common Name(s): Whippoorwill, Sweet Betsy, Large Toadshade
Varieties, Forms): f. cuneatum, f. luteum, "aff ludo"
Location: Southeastern USA, Cumberland Plateau
Description: GroupIII, Most diverse species, leaves moderately mottled. Colors include maroon, yellow, green, and bronze. The "aff ludo" form has narrow petals and diverse colors.

Photograph: Harold Holmes

Scientific Name: DECIPIENS
Common Name(s): Deceiving Trillium
Varieties, Forms): None Known
Location: SE USA
Description: Group II

Photograph: Harold Holmes

Scientific Name: DECUMBENS
Common Name(s): Trailing Toadshade, Decumbent Trillium
Varieties, Forms): maroon and yellow forms
Location: SE USA
Description: Group II

Photograph: Harold Holmes

Scientific Name: DISCOLOR
Common Name(s): Pale Yellow T., Pale T., Small Yellow Toadshade
Varieties, Forms): None Known
Location: SE USA
Description: Group II

Photograph: Harold Holmes

Scientific Name: FOETIDISSIMUM, f. foetidissimum
Common Name(s): Stinking Toadshade
Varieties, Forms): f. foetidissimum, f. luteum.
Location: SE USA
Description: Group III,

Photograph: Carl Denton

Scientific Name: GRACILE, f. gracile
Common Name(s): Slender Toadshade
Varieties, Forms): f. gracile, f, luteum.
Location: SE USA
Description: Group III, f. gracile, f, luteum.

Photograph: Carl Denton - Large image

Scientific Name: KURABAYASHII
Common Name(s): Western Whippoorwill Toadshade
Varieties, Forms): f. kurabayashii, f. luteum.
Location: Western USA
Description: Group III,

Photograph: Julie Lockwoods

Scientific Name: LANCIFOLIUM
Common Name(s): Lance Leaf Toadshade
Varieties, Forms): None Known
Location: SE USA
Description: Group I.

Photograph: Susan Farmer

Scientific Name: LUDOVICIANUM
Common Name(s): Louisiana Toadshade
Varieties, Forms): None Known
Location: SE USA
Description: Group III.

Photograph: Carl Denton

Scientific Name: LUTEUM
Common Name(s): Yellow or Lemon Toadshade, Yellow T., Wax T.
Varieties, Forms): None Known
Location: SE USA
Description: Group III.

Photograph: Harold Holmes

Scientific Name: MACULATUM, f. maculatum
Common Name(s): Marble Leaf Toadshade
Varieties, Forms): f. maculatum, f. luteum, f. simulans.
Location: SE USA
Description: Group III,

Photograph: Harold Holmes

Scientific Name: MACULATUM, f. luteum
Common Name(s): Marble Leaf Toadshade
Varieties, Forms): f. maculatum, f. luteum, f. simulans.
Location: SE USA
Description: Group III,

Photograph: Harold Holmes

Scientific Name: MACULATUM, f. simulans
Common Name(s): Marble Leaf Toadshade
Varieties, Forms): f. maculatum, f. luteum, f. simulans.
Location: SE USA
Description: Group III,

Photograph: Carl Denton

Scientific Name: PARVIFLORUM
Common Name(s): Western Small Flower
Varieties, Forms): None Known
Location: Western USA
Description: Group III.

Photograph: Susan Farmer

Scientific Name: PETIOLATUM
Common Name(s): Western Whippoorwill Toadshade
Varieties, Forms): None Known
Location: Western USA
Description: Group III.

Photograph: Carl Denton

Scientific Name: RECURVATUM, f. recurvatum
Common Name(s): Prairie Trillium, Bloody Butcher
Varieties, Forms): f. recurvatum, f. foliosum, f. luteum, f. petaloideum, f. "Shayi"
Location: Eastern USA
Description: Group I,.

Photograph: Harold Holmes

Scientific Name: RECURVATUM, f. "Shayi"
Common Name(s): Prairie Trillium, Bloody Butcher
Varieties, Forms): f. recurvatum, f. foliosum, f. luteum, f. petaloideum, f. "Shayi"
Location: Eastern USA
Description: Group I,

Photograph: Carl Denton - Large image

Scientific Name: RELIQUUM, f. reliquum
Common Name(s):
Varieties, Forms): f. reliquum, f. luteum
Location: SE USA
Description: Group II, (Endangered Species),

Photograph: Harold Holmes

Scientific Name: SESSILE, f. sessile
Common Name(s): Toad T., Common Toadshade
Varieties, Forms): f. sessile, f. viridiflorum.
Location: Eastern USA
Description: Group II,

Photograph: Susan Farmer

Scientific Name: STAMINEUM, f. stamineum
Common Name(s): Twisted T., Flared Toadshade
Varieties, Forms): f. stamineum, f. luteum.
Location: SE USA
Description: Group II,

Photograph: Harold Holmes

Scientific Name: UNDERWOODII
Common Name(s): Elk Heart
Varieties, Forms): None Known
Location: SE USA
Description: Group II, leaves greatly mottled.

Photograph by Kirk Zufelt

Scientific Name: VIRIDE
Common Name(s): Green Trillium
Varieties, Forms): None Known
Location: Eastern USA
Description: Group III.

Photograph: Carl Denton

Scientific Name: VIRIDESCENS
Common Name(s): Western Whippoorwill Toadshade
Varieties, Forms): None Known
Location: Eastern USA
Description: Group III.

Photograph: Carl Denton