 The erect , odorless flowers are large , especially compared to other species of Trillium , with 4 to 7 cm ( 1 @.@ 5 to 3 in ) long petals , depending on age and vigor . The petals are shaped much like the leaves and curve outward . They have a visible venation , though this is nowhere near as marked as on the leaves . Their overlapping bases and curve give the flower a distinctive funnel shape . Between the veined petals , three acuminate ( ending with a long point ) sepals are visible ; they are usually a paler shade of green than the leaves , and are sometimes streaked with maroon . Flowers are perched on a pedicel ( i.e. , flower stalk ) raising them above the leaf whorl , and grow pinker as they age . 
