360 . TlMLI.IACEiK. 



2. TRILLIUM. 2>i7m.— TrifUum. 

 (From the Latin trilix, triple ; several parts of the plant being in threes.) 

 Perianth deeply 6 -parted ; 3 outer segments (sepals) spread- 

 ing; 3 inner petaloid, (petals.) Stamens 6, inserted at the 

 base of the segments, nearly equal. Anthers linear. Styles 3, 

 distinct or united at base, stigmatose on the inside. BeiTy 

 ovoid, 3 -celled ; cells many-seeded. 



* Flowers sessile. 



1. T. sessile Linn. : leaves sessile, broad-ovate, acute ; flower closely 

 sessile, erect ; petals lanceolate, erect, tw^ice as long as the calyx. 



Fertile hills. Penn. to Car. Pur?h. April, May. %. — Stem 8 inches high, 

 .smooth. Petals dark-purple. Common Sessile Trillium. 



2. 7'. recurvatum Beck : leaves ovate or obovate, subpetiolate, nerved , 

 flovvrer closely sessile ; petals lanceolate-ovate, very acute, attenuate at base, 

 erect, as long as the recurved calyx. 



Shady woods. Miss. May. — Stem 8 — 10 inches high, smooth. Leaves 



smooth, clouded with dark-green. Petals purple. Filaments very short. I 



' have been led to introduce this and the next species, described some years since, 



{Sill. Jour. xi. 178,) from the fact that under the name T. sessile, several distinct 



species have heretofore been included. Recurved Sessile Trillium. 



3. T. viride Beck: leaves ovate, acute, closely sessile, 3 — 5-nerved; 

 flower erect, closely sessile ; petals fleshy, narrow, somewhat spatulate, a 

 little longer than the lanceolate or ovate obtuse erect calyx. 



Shady woods. ]\Iiss. April. %-. — Stetn 8 — 12 inches high. Leaves with 

 whitish spots on the upper surface. Petals dark-green. Sepals variable. 



Green Sessile Trillium. 



** Flawers pedun^tdate. 



4. T. erythrocarpuni Mich.: leaves ovate, acuminate, rounded at the 

 base, abruptly contracted into a short petiole ; peduncle somewhat erect ; 

 petals from ovate to ovate-lanceolate, acute, recurved, nearly twice as long 

 as the sepals. T. pictum Pursh. T. undulatum Willd. 



Shady woods. Can. to Car. May, June. %. — Stem 6 — 10 inches high. 

 Flower on a peduncle about an inch long. Petals white with purple veins 

 near the base. Berry scarlet. Red-berried Trillium. 



5. T. pusUlum Mich. : leaves oval, oblong, obtuse, sessile ; peduncle 

 erect ; petals scarcely longer than the sepals. T. pumilum Pursh. 



Woods. Penn. to Car. Muhl. May. %.— Plant small. Petals flesh- 

 colored. Dwarf Trillium. 



6. T. cermmm Linn.: leaves dilated-rhomboid, abruptly acuminate, on 

 short petioles ; peduncle short, recurved ; petals ovale, acuminate, flat, us 

 long as the ovate-lanceolate sepals. 



Shady woods. N. Y. to Car. May. %. — Stem 12 — 18 inches high. Mower 

 small, on a rocurved peduncle, partly concealed by the leaves. Petals white. 

 Berry large, ovoid, dark-purple. Nodding Trillium. 



7. T erectum Linn.: leaves broad-rhomboid, acuminate, sessile; {•«- 



