STUDIES ON PLANT FAMILIES. 



CHAPTER XXXVIII. 



MONOCOTYLEDONES. 



Topic I : Monocotyledones with conspicuous petals 

 (Petaloideae). 



ORDER LILIIFLOR^E. 



385. The lily family (liliaceae). Trillium grandiflorum 

 which we employed as a representative of the monocotyledons 

 in the morphology of the angiosperms, serves as one type of the 

 lily family. An exercise is added here on the " yellow adder's- 

 tongue " for those who wish to study more than one example 

 of the order. There is an abundance of material from the 

 members of the family if the teacher desires to extend further 

 the exercises on the liliaceae. 



Yellow adder's-tongue (Erythronium americanum). (To be 

 used as an alternate for trillium if preferred.) 



Exercise 64. 



386. Entire plant. Observe the bulb from which the flowering scape 

 arises ; the small scale-like leaves overlapping it ; the two large spotted leaves 

 on plants which have the flower. In the case of the nonflowering plants ob- 

 serve that there is only one large leaf. If an opportunity affords for an ex- 

 cursion in the woods where the plant grows, see if you can determine how 

 the bulbs are formed at the ends of the " runners." As to depth in the soil 

 compare the bulbs of the flowering and nonflowering plants. 



Inflorescence. The inflorescence is determinate, and consists of a single 

 terminal nodding flower on a scape. 



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