5 2 4 TRILLIACEAE. Vol. I. 



2. Trillium viride Beck. Green Wake-robin. 

 Fig. 1300. 



Trillium viride Beck, Am. Journ. Sci. 11: 178. 1826. 



Perennial by a short corm-like rootstock, light 

 green. Stems solitary, or several together, 4'-is' 

 tall, rough-pubescent near the top, or glabrous in 

 age; leaves oblong to ovate, 2-4' long, obtuse or 

 acutish, 3-5-nerved, usually blotched, more or less 

 pubescent on the nerves beneath ; flowers sessile ; 

 sepals linear or linear-lanceolate, i'-2' long, bright 

 green, acute or obtuse; petals clawed, the blades lin- 

 ear or nearly so, surpassing the sepals, light green 

 or purplish green, the claws sometimes brown or 

 purple; stamens about J as long as the petals; fila- 

 ments flattened, J-i shorter than the anthers. 



In woods and glades, Kansas to Missouri, Tennessee, 

 Mississippi and Arkansas. Spring. 

 Trillium viridescens Nutt., a species distinguished from T. viride by its purplish petals and 

 acuminate leaves, occurs in Arkansas and is reported from Kansas. 



3. Trillium recurvatum Beck. Prairie Wake- 

 robin. Fig. 1301. 



Trillium recurvatum Beck, Am. Journ. Sci. n: 178. 

 1826. 



Stem 6'-i8' tall. Leaves ovate, oval or oblong, 

 1J-4' long, acute at the apex, narrowed into petioles 

 3" -9" long, sometimes blotched; flower sessile, erect; 

 sepals lanceolate, acuminate, 6"-is" long, reflexed 

 between the petioles; petals spatulate or oblong, 

 nearly erect, clawed, acute or acuminate, equalling 

 the sepals or somewhat longer; anthers 4"-7" long, 

 much longer than the filaments, the connective pro- 

 longed beyond the sacs ; berry ovoid, 6-winged above, 

 about 9" long. 



In woods and thickets, Ohio to Minnesota, Mis- 

 sissippi and Arkansas. April-June. 



4. Trillium nivale Riddell. Early Wake- 

 robin. Fig. 1302. 



Trillium nivale Riddell, Syn. Fl. W. States, 93. 

 1835. 



Stem 2'-6' high. Leaves ovate, oval or nearly 

 orbicular, 1-2' long, obtuse at the apex, rounded 

 or narrowed at the base, petioled; petioles, 2"-6" 

 long; flowers peduncled; peduncle i'-i' long, 

 erect, bent, or recurved beneath the leaves ; sepals 

 narrowly oblong or oblong-lanceolate, obtuse, 

 i'-i' long; petals white, oblong or oval, obtuse, 

 longer than the sepals, erect-spreading; anthers 

 about as long as the filaments, the connective not 

 prolonged beyond the sacs ; styles slender ; berry 

 globose, 3-lobed, about ¥ in diameter. 



In woods and thickets, Pennsylvania to Ohio and 

 Minnesota, south to Kentucky and Nebraska. Showy 

 or Dwarf white wake-robin. March-May. 



