64 SMILACEAE (SMILAX FAMILY) 



D. Leaves long-acuminate; pedicels woolly-pubescent; stamens about if times 



as long as the perianth; berry acutish. W. C. E. D. oreganum 



DD. Leaves acute or short-acuminate; pedicels not woolly-pubescent; stamens 



about equaling or shorter than the perianth; berry beaked or obtuse. 

 E. Leaves deeply cordate at base; stamens about equaling the perianth; ovary 

 pubescent, obtuse. U. D. hooker! 



EE. Leaves rounded to cordate at base; stamens about f as long as the perianth; 

 ovary glabrous, with short stout beak. U. D. trachyandrum 



CC. Leaves averaging about 2.5 cm. long; stamens J as long as the perianth; fila- 

 ments very short, much shorter than the anthers. U. D. parvifolium 



STREPTOPUS (TWISTED-STALK) 



Stem leafy. Flowers axillary, solitary or 2 on a forked peduncle. Peri- 

 anth segments distinct. Stamens on base of perianth. Ovary sessile; 

 stigma entire to 3-cleft. (Gk. streptos = twisted, pous = foot ; because 

 the peduncles are bent or twisted about the middle.) 



A. Flowers rotate. C. S. streptopoides 

 AA. Flowers narrowly campanulate. 



B. Leaves glaucous beneath, strongly clasping at base; flowers greenish white; 



stigma entire. W. C. E. S. amplexifolius 



BB. Leaves green on both sides, not clasping, but sessile; flowers rose-purple; 



stigma 3-cleft. W. C. E. S. roseus 



TRILLIUM (TRILLIUM) 



Glabrous; rhizome short, tuber-like; stem short, simple, with scarious 

 sheaths at base. Leaves netted- veined, but the chief veins from the base. 

 Sepals lanceolate, persistent. Stamens 6, hypogynous. Ovary 3~6-angled 

 or 3-6-lobed, 3-celled; styles 3. Fruit a capsule, 3-celled or imperfectly 

 i-celled, berry-like. Seeds many. (L. trilix = triple ; because leaves 

 and flower parts are in 3*5.) 



A. Flowers sessile. 



B. Leaves sessile, mottled; petals whitish; sepals obtuse; anthers white. W. 



T. chloropetalum (MOTTLED TRILLIUM) 



BB. Leaves long-petioled, usually not mottled; petals brown-purple; sepals acute; 

 anthers dark purple. E. T. petlolatum (PURPLE TRILLIUM) 



AA. Flowers with peduncle 2.5-7.5 cm. long. 



C. Ovary 3-lobed or -angled; leaves oblong. U. T. rlvale 

 CC. Ovary 6-angled; leaves rhombic-ovate. W. C. E. T. ovatum 



SMILACEAE (SMILAX FAMILY) 



Shrubby or herbaceous, climbing. Leaves alternate, wide, 

 netted-veined, petioled, with stipular tendrils. Flowers small, 

 dioecious, in axillary umbels; yellowish or greenish. Perianth 

 segments 6, similar, distinct. Stamens mostly 6; filaments 

 ligulate; anthers basifixed, introrse. Ovary superior, 3-celled 

 or rarely i -celled; style very short or none; stigmas 1-3. Fruit 



