360 



2. TRILLIUM. Z/wu.-Trillmiil. 



(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. Berry 

 ovoid, 3 -celled ; cells many-seeded. 



* Flowers sessile. 



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

 sessile, erect ; petals lanceolate, erect, twice as long as the calyx. 



Fertile hills. Penn. to Car. Pursh. April, May. 1\..Stem 8 inches i high, 

 smooth. Petals dark-purple. Common Sessile Trillium. 



2. T. recurvdtum Beck : leaves ovate or obovate, subpetiolate, nerved , 

 flower 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. Miss. April. 1|~ Stem 8 12 inches high. Leaves with 

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



Green Sessile Trillium. 



** Flowers pedunculate. 



4. T. erythrocarpum 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. pidum Pursh. T. undulatum WiUd. N 



Shady woods. Can. to Car. May, June. TJ.. Stem 610 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. pusillum Mick. : leaves oval, oblong, obtuse, sessile ; peduncle 

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



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

 colored. Dwarf Trillium. 



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

 short petioles ; peduncle short, recurved ; petals ovate, acuminate, flat, <*s 

 long as the ovate-lanceolate sepals. 



Shady woods. N. Y. to Car. May. %. Stem 1218 inches high. Flower 

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

 Perry targe, ovoid, dark-purple. Nodding Trilliwm. 



7. T erectum Linn. : leaves broad-rhomboid, acuminate, sessile ; p- 



