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. Liliacea3 (lily family). 

 Genus. Trillium. 



Species. 1 (e.g.) sessile L. 



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 of Liliales comprises about 5,000 species. The lower Mono- 

 cotyledons have naked flowers (i.e., no sepals and petals), with the parts 

 spirally arranged, as in the Gymnosperms. The higher ones have the 

 parts of the flower arranged in concentric 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" (;th Edition, 1908) subdivide the Liliaceae 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. 



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