120 LILIACEffi. (lily family.) 



18. TRILLIUM, L. Three-leaved Nightshade. 



Flowers white to purple; outer segments green, inner petaloid. Anthers adnate 

 introrse. Stigmas linear, sessile. Stem bearing at the top a single whorl of 3 broad 

 netted- veined leaves. 



1. T. sessile, L. var. Californicum, Wat. The sessile leaves broadly rhombic- 

 ovate, 3 to 6 inches long; flower sessile, petals oblanceolate to rhombic-ovate, 1 to 4 

 inches long, purple or rose-color or white. 



2. T. ovatum, Pursh. (Wake Robin.) Leaves similar to the last, smaller; flower 

 on a pedicel, white, turning rose-color. 



19. VHRATRUM, Tourn. False Helebore. 

 Perianth slightly adherent to tho ovary. Anthers cordate or reniform, peltate after 

 opening. Capsule membranous, 3-beaked. Stems stout and leaf}' from thick rootstocks. 



1. V. Californicum, Durand. Stem several feet high; lower leaves broad-elliptical, 

 upper leaves lanceolate; bracts usually exceeding the pedicels; perianth-segments broadly 

 oblanceolate, whitish with greener base, often denticulate, 3 to 8 lines long; capsule an 

 inch long. — iMoist places. 



2. V. fimbriatum, Gr. Leaves narrowed at base, 6 to 18 inches long, 2 to 6 inches 

 wide, acute or acuminate; perianth-segments rhombic-ovate 3 to 5 lines long: capsulo 

 4 lines long. — Swamps. 



20. ZYGADENUS, Michx. 

 Flowers white or greenish, erect in paniculate or simple racemes. Perianth-segments 

 oblong-lanceolate to ovate, mostly glandular and somewhat narrowed at base. 



1. Z. Fremontii, Torr. Stem G inches to 3 ft. high; leaves glaucous, an inch broad, 

 or less; bracts mostly green; periantli 3 to 7 lines long, gland irregular and notched on 

 its upper margin. Flowers perfect. 



2. Z. venenosus, Wat. Stem slender, 6 inches to 2 ft. high; leaves rarely over 2 

 or 3 lines broad, scabrous; raceme simple, rarely compound, short, with narrow scarious 

 bracts; perianth-segments 2 or 3 lines long. Flowers polygamous. 



21. XERCPHYLLUM, Michx. 



Flowers white, in a sub-pyramidal many-flowered raceme. Styles reflexed or recoiled, 

 Btigmatic doAvn the inner side. Cauline leaves numerous, setaceous. 



1. X. tenas, Nutt. Stem 2 to 5 ft. high; leaves about 2 lines broad, often 2 or 3 

 ft. long; raceme becoming a foot or more long; perianth-segments oblong, 4 or 5 lines 

 long, scarcely equaling the stamens. 



LETJCOCRIlS^UM MONTANUM, Nntt., is an acaulescent plant whicli produces 4 to 8 fragrant white 

 flowera ou shurt perliceld arising from a eubterraueau stein; the sleuaer tube of the saiVer-funu periaith 

 an inch ( r two loug —Sandy valley-*. 



Order ARACEE is represe'.led by SYMI T.OCAIIPUS KAMTScHATICUS Bong. (Skunk Cabbage) a 

 mari-h plant A\ith large erect leaves, the liesay spadix becoming au oblong-ovoid fruit two or threa 

 inches in length. 



