CONYALLARIACEAE. 



i. Trillium sessile L. Sessile-flowered 

 Wake-robin. (Fig. 1043.) 



Trillium sessile L. Sp. PI. 340. 1753. 



Stem 4 / -ia / tall. Leaves ovate, oval or nea 

 orbicular, sessile, acute or obtuse and cuspidate at 

 the apex, i^'-6' long, often blotched; flower ses- 

 sile, erect; sepals lanceolate, acute or obtuse, 

 spreading, ^ / -2 / long, petals lanceolate, acute or 

 obtuse, somewhat longer than the sepals, erect- 

 speading, purple or green; anthers 3"-7" long, 

 longer than filament, the connective prolonged 

 beyond the sacs; berry globose, 6-angled, about 

 Yz f in diameter. 



In moist woods and thickets, Pennsylvania to Ohio 

 and Minnesota, south to Florida, Mississippi and 

 Arkansas. Flowers pleasantly odorous. April-May. 





2. Trillium recurvatum Beck. Prairie 

 Wake-robin. (Fig. 1044.) 



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

 178. 1826. 



Stem e'-iS' tall. Leaves ovate, oval or ob- 

 long, i ^'-4' long, acute at the apex, narrowed 

 into petioles $"-<)" long, sometimes blotched; 

 flower sessile, erect; sepals lanceolate, acumi- 

 nate, 6 // -i5 // long, reflexed between the peti- 

 oles; petals spatulate or oblong, nearly erect, 

 clawed, acute or acuminate, equalling the se- 

 pals or somewhat longer; anthers 4 // ~7 // long, 

 much longer than the filaments, the connective 

 prolonged beyond the sacs; berry ovoid, 6- 

 winged above, about 9" long. 



In woods and thickets, Ohio to Minnesota, Mis- 

 sissippi and Arkansas. April-June. 



3. Trillium nivale Riddell. Early 

 Wake-robin. (Fig. 1045.) 



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



1835- 



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

 nearly orbicular, i / -2 / long, obtuse at the apex, 

 rounded or narrowed at the base, petioled; pet- 

 ioles, 2 // -6 // long; flowers peduncled; peduncle 

 K'-i' long, erect, bent, or recurved beneath the 

 leaves; sepals narrowly oblong or oblong- lance- 

 olate, obtuse, YZ'-I.' long; petals white, oblong 

 or oval, obtuse, longer than the sepals, erect- 

 spreading; anthers about as long as the fila- 

 ments, the connective not prolonged beyond 

 the sacs; styles slender; berry globose, 3-lobed, 

 about l /z' in diameter. 



In woods and thickets, Pennsylvania to Ohio and 

 Minnesota, south to Kentucky and Iowa. March 

 May. 



