TRILLIUM CONVALLARIACE.E 661 



upper half spreading or deflexed : inner segments linear-spatulate, shorter 

 than the outer ones, incurved and connivent over the stigmas : filaments 

 1-2 lines long, about half as long as the ovary. On moist mossy banks 

 along mountain streams, western Oregon. 



7 TRILLIUM L. Sp. 339. 



Glabrous erect herbs with short tuber-like rhizomes, short simple 

 stems bearing scarious sheaths at base and 3 flat leaves in a whorl 

 around a single large flower at the summit. Perianth of 6 distinct 

 persistent segments: the 3 outer narrow, green and sepal-like; the 

 3 inner broader and usually white or red. Stamens 6, hypogyn- 

 ous ; with short filaments and linear, mostly extrorse, anthers. 

 Ovary sessile, 3-6-angled or lobed, 3-celled, with several to many 

 ovules in each cell. Styles 3, stigmatic along the inner side. 

 Fruit a 3-celled or imperfectly 1-celled many-seeded berry-like 

 capsule. Seeds ovate, with close thin testa. 



T. petiolatum Pursh Fl. 544. Stem 3-4 inches high, often scarcely 

 exserted above the basal sheaths : leaves with ovate-elliptic to reniform 

 blade 3-6 inches wide, on stout petioles as long or longer: flower sessile; 

 sepals oblong-lanceolate, acute, about an inch long: petals dark purple, 

 narrowly objanceolate, scarcely longer than the sepals, 2-3 lines \vide: 

 anthers 6-8 lines long, dark purple: styles 5-6 lines long, recurved; ovary 

 shortly beaked. On rich hillsides and in copses, eastern Oregon and 

 Washington to Idaho. 



T. chloropetalum. T. sessile var. chloropetalum Ton. in part. T. 

 sessile var. Calif ornicum Watson. Rhizome oblong to obovate, usually 

 erect, about an inch long: stem 6-18 inches high: leaves broadly rhombic- 

 ovate thickish, usually marked with whitifh blotches, 2-6 inbes long, often 

 broader than long, obtuse, closely sessile : flower sessile : sepals elongated- 

 oblong, obtuse, 10-12 lines long, 3 lines wide: petals white, oblanceolate, 

 obtuse, 1-1^ inches long 3-4 lines wide, erect: anthers nearly sessile, 

 white, about 6 lines long, longer than the stigmas. In wet copses, western 

 Oregon to California. 



T. ovatnin Pursh Fl. 245. Rhizome oblong 1-2 inches long, horizont- 

 al: stem stout, 1-2 feet high: leaves rhombic-ovate, 3-8 inches long, 

 usually acuminate, cuneately narrowed at base, sessile: peduncle slender, 

 1-3 inches long: sepals lanceolate, acute 1-2 inches long, 3-4 lines wide: 

 petals broably lanceolate, acute, l>-2> inches long, 4-12 lines wide, white, 

 soon changing to rose-color and dark red : stamens 3-8 lines long; anthers 

 yellow : styles slender, recurved or revolute at the apex. Common in 

 wooded districts, California to Brit. Columbia. 



T. rivale Watson Proc Am. Acad. xx, 378. Rhizome oblong, 6-10 

 lines long, horizontal : stem slender, 2-10 inches long, erect or ascending, 

 leaves ovate, obtuse and apiculate to acute or acuminate, l>2-3 inches long : 

 rounded or subcordate at base, on petioles 4-10 lines long : flower on a 

 slender usually declined peduncle 1-3 inches long: sepals broadly lanceo- 

 late, acute to acuminate 6-10 lines long : petals broadly lanceolate to ovate, 

 acute to acuminate, narrowed below to a claw, but little longer than the 

 sepals, white, speckled with purple near the centre: stamens about equal- 

 ling the short recurved stigmas : capsule slightly if at all lobed. On rocky 

 banks in the Coast Mountains, southern Oregon and adjacent California. 



ORDER XCVIII MLANTHACEJE R. Br. Prodr. i, 272. 

 Leafy-stemmed herbs with rootstocks or bulbs, broad or 



