TKILLIACEAE 277 



Petals purple or purplish brown : stamens with purple filaments 



and connectives : ovary purple. 14. T. erectum. 



Petals white or pinkish : stamens with pink or reddish filaments 



and connectives : ovary pink or red. 15. T. album. 



ft Filaments slender, as long as the anthers or nearly so. 16. T. Vaseyi. 



** Petals oblanceolate or obovate-oblanceolate, much longer than the 



sepals. 17. T. grandiflorum. 



b. Pedicel recurved or declined, shorter or slightly longer than the sepals. 



Bracts rhombic or orbicular-i hombic : filaments % as Ion 8 as tne antners. 18. T. cernuum. 

 Bracts oval or elliptic : filaments longer than the anthers. 19. T. stylosum. 



B. Bracts narrowed into petiole-like bases. 20. T. undulatum. 



1. Trillium discolor Wray. Scapes 1-2 dm. tall, smooth : bracts 3 ; blades oval, 6-7 

 cm. long, obtuse, or short-acuminate, 3-5-nerved, mottled, rounded at the base : flower ses- 

 sile : sepals oblong or oblong-lanceolate, 2 cm. long, obtuse or acute, spreading : petals 

 broadly spatulate, greenish, sessile, rounded, and one usually apiculate at the apex : 

 stamens less than as long as the petals, the filaments nearly wanting : berry not seen. 



In pine woods, North and South Carolina and Georgia. 



2. Trillium stamineum Harbison. Scapes sometimes clustered, 1-3 dm. tall, pubes- 

 cent near the top : bracts 3 ; blades ovate-lanceolate to broadly ovate, 5-8 cm. long, acute 

 or acuminate, mottled and usually somewhat pubescent on the veins beneath, sessile : 

 flower sessile, fetid : sepals broadly lanceolate to elliptic, 2-3 cm. long, deeply purple- 

 tinged, spreading or finally reflexed : petals lanceolate, dark purple, widely spreading and 

 somewhat twisted, somewhat narrower than the sepals : stamens -f as long as the petals : 

 anthers stout, 15-18 mm. long, dark purple, straight : filaments very short, colored like 

 the anthers : stigmas slender : berry ovoid, about 1 cm. in diameter, pale purple. 



In rocky woods, Georgia, Alabama and Mississippi. 



3. Trillium deciimbens Harbison. Scapes solitary or sometimes clustered, 4-10 cm. 

 long, rough-pubescent at the summit : bracts 3 ; blades ovate, broadly ovate or suborbicu- 

 lar, 4-8 cm. long, 3-6 cm. wide, acute or obtuse, rounded at the base, sessile, usually pu- 

 bescent on the nerves beneath, mottled : flower sessile : sepals lanceolate, occasionally 

 somewhat broadly so, 2-3 cm. long, acute, purplish at the base, green above : petals linear 

 or linear-lanceolate, 4-7 cm. long, acute, erect, purple : stamens $-J- as long as the petals: 

 filaments very short, the connective much prolonged beyond the anther-sacs : stigmas 

 short : berry ovoid, about 1 cm. in diameter, prominently and sharply angled, the angles 

 in pairs. 



In rocky woods, northeastern Alabama. 



4. Trillium sessile L. Scapes solitary or clustered, 1-2 dm. tall, slender : bracts 3 : 

 blades oval or suborbicular, 4-8 cm. long, rounded at the base, sessile, not mottled : flower 

 sessile : sepals lanceolate, 2-3 cm. long, acute or acutish : petals narrowly elliptic, sessile, 

 acutish, purple : stamens about as long as the petals : filaments dilated at the base, J-J 

 shorter than the anthers : stigmas elongated : berry broadly ovoid, 1-1.5 cm. long. 



In woods, Pennsylvania to Minnesota, Florida and Mississippi. 



5. Trillium Underwoodii Small. Scapes solitary or clustered, 1-3 dm. tall, stout : 

 bracts 3 ; blades lanceolate to ovate-lanceolate, 10-18 cm. long, acute or short-acuminate, 

 with a velvety luster, mottled with three shades of green, sessile : flower often musk- 

 scented : sepals lanceolate, 4.5-5.5 cm. long, green or purplish green : petals lanceolate, 

 elliptic or oblanceolate, 5.5-8.5 cm. long, sessile, acute or obtuse, erect, purple : stamens 

 J-J as long as the petals : filaments less than 2 mm. long : anthers 1-1.5 cm. long, subses- 

 sile : stigmas recurved : berry ovoid, 1.5-2 cm. long. 



In woods and fields, North Carolina to Tennessee, Florida and Alabama. 



6. Trillium Hugeri Small. Scapes relatively stout, 1-2.5 dm. tall : bracts 3 ; blades 

 suborbicular to broadly ovate, 10-14 cm. long, abruptly pointed, bright green, typically not 

 mottled : flowers sessile, musk-scented : sepals oblong to oblong-lanceolate, 4-5.5 cm. long, 

 green : petals oblong-lanceolate to spatulate, purple, somewhat longer than the sepals : fila- 

 ments over 2 mm. long : anthers 1-2 cm. long : berry broadly ovoid. 



In rich woods, North Carolina and Tennessee to Florida. Spring. 



7. Trillium luteum (Muhl. ) Harbison. Scapes 1.5-3 dm. tall, purplish at the base : 

 bracts 3 ; blades orbicular to orbicular-ovate, 1-2 dm. long, acuminate or abruptly pointed, 

 rarely slightly mottled, rounded or abruptly contracted at the base : flower sessile, lemon- 

 scented : sepals lanceolate, sometimes narrowly so, 4-5 cm. long, acute or acutish, green : 

 petals lanceolate, to oblong-elliptic, 6-8 cm. long, acute or acutish, bright yellow or lemon - 

 yellow: stamens about | as long as the petals: anthers 1.5-2 cm. long, nearly sessile : 

 berry ovoid, 1.5-2 cm. long. 



In woods and on hillsides, North Carolina and Tennessee to Georgia. 



