Trillium (WAKE-ROBIN) 



A. Classification: 



Division VII. Spermatophyta. 

 Subdivision B. Angiospermae (seeds enclosed in an 



ovary) . 

 Class I. Monocotyledoneae (embryo with one 



lateral cotyledon). 

 Order. Liliales (lily order). 

 Family. Liliaceae (lily family). 



Genus. Trillium (Latin ires, three). 

 Species, (e.g., sessile) (sessile flowered 

 trillium). 1 



B. Habitat: 



All species of Trillium occur in the woods in early 

 spring, and the genus has a geographic range extend- 

 ing from Nova Scotia westward to Manitoba, and 

 southward as far as Florida. 



1 Any species of Trillium may be used, with minor changes in the direc- 

 tions; or, in fact, any other convenient genus of the Liliaceae. 



NOTE. There are nearly 25,000 different species of Monocotyledons. 

 The order Liliales, comprising about 5,000 species, contains the most 

 highly developed types. The lower Monocotyledons have naked flowers 

 (i.e., no sepals and petals), with the parts spirally arranged, as in the Gym- 

 nosperms. The higher ones have the parts of the flower arranged in con- 

 centric circles or cycles, five in number (pentacyclic), with usually three 

 members in each cycle. Our knowledge of the monocotyledons is not yet 

 adequate to make possible a satisfactory classification. Taxonomists 

 differ in various points. The authors of Gray's "New Manual" (yth 

 Edition, 1908) subdivide the Liliacese into Tribes. Trillium is in the tribe, 

 Paridea. Britton ("Manual of the Flora of the Northern States and 

 Canada") and others, divide the Liliaceae, as given in Gray, into four or 

 more families, the trilliums being in the Convallariacea, or Lily-of-the- 

 valley family. 



12 177 



