* 



238 COMMON CANADIAN WILD PLANTS. 



generally 3-celled. The outer and inner divisions of the 

 perianth coloured alike, except in the genus Trillium. (See 

 Part. I., sections 82-87, for description of typical plant of 

 this Order.) 



Synopsis of the Genera. 



* Leaves net-veined, all in one or two whorls. The stem otherwise naked, 



rising from a fleshy rootstock. Styles 3. 



1. Trillium. Leaves 3, in a whorl at the top of the stem. Divisions 



of the perianth in 2 sets, the outer green, the inner coloured. (See 

 Part I., sections 85 and 86.) 



2. Merte'ola. Leaves in 2 whorls, the lower near the middle of the 



stem, and consisting of 6-9 leaves, the upper of (generally) 3 small 

 leaves, near the summit. Stem, tall, covered with loose wool. 

 Flowers small, in an umbel. Divisions of the perianth alike, 

 greenish-yellow, recurved. Anthers turned outwards. Styles 

 thread-shaped. Berry globular or nearly so, dark purple. 



* * Leaves straight-veined, linear, grass-like, alternate. Stem simple or 



tufted. Styles 3. 



3. Zygade'nns. Flowers rather large, perfect or polygamous, green- 



ish-white, in a few-flowered panicle ; the divisions of the perianth 

 each with a conspicuous obcordate spot or gland on the inside, 

 near the narrowing base. Stem smooth and glaucous, from a 

 coated bulb. 



4. Tofleld'la. Flowers small, perfect, greenish-white, in a terminal 



raceme or spike, which, however, develops from above downward ; 

 the pedicels in clusters cf 3, from little involucres of 3 bracts. 

 Pod triangular. Roots fibrous. Stem leafy at the base only, in 

 our species sticky. Leaves 2-ranked, equitant. 



* * * Leaves straight-veined, but broad (not grass-like), alternate. Stem 



from a rootstock of fibrous roots, at all events not from a bulb. 

 Style one, or more or less divided into 3 above. 



*- Perianth of completely separate pieces f poly phyllous.J 



5. 1 villa' ria. Stem leafy, forking above. Flowers yellow, at least an 



inch long, drooping, lily-like, usually solitary (but occasionally 

 in. pairs) at the end of the forks of the stem. Style deeply 3- 

 cleft. Pod triangular. Leaves clasping -per foliate or sessile. 



6. Cllnto'ula. Stemless, the naked scape sheathed at the base by 2, 3, 



or 4 large oblong or oval, ciliate leaves. Flowers few, greenish- 

 yellow, in an umbel at the top of the scape. Filaments long and 

 slender. Style long, the stigmas hardly separate. Berry blue. 



7. Prosar'tes. Downy low herbs, branching above. Flowers greenish, 



bell-shaped, rather large, solitary or in pairs, drooping on terminal 



