28 



BOTANY OF LA SALL,E COUNTY. 



If now we examine some plants; part dicot} r ledons. 

 part monocatyledons, we shall find many differences 

 between them; of these the chief may be summed up 

 as follows: 



Dicotyledons. 



Monocatyledons. 



Two seed leaves 



Stem branches 



Leaves various shaped often lobed 



Leaves net veined that is the 



Veins run in various directions and 

 run in to each other forming a net 

 work 



Flowers have their parts in Is. 2s or 5s Calyx and 



Calyx and Corolla generally different 

 one from the other 



Stamens 2 to 100 or more 



Pistils 1 to many 



Fruit 1 to many, celled 



Stem composed of bs.rk. wood pith 



One seed leaf. 



Seldom branches, 



Leaves long, narrow, parallel veined. 



Leaves parallel veined, that is, they 



are nearly parallel to the third rib 



and do not join a net work. 

 Flower has its parts in 3s. 

 corolla alike. 



Stamens 3, 6. 



Pistils 1. 3, 6. 



Fruit 1. 3. 6 celled. 



No distinction of bark wood and pith. 



Flowers may be alone or solitary one on a peduncle, 

 or in clusters variously arranged. If placed one above 

 the other on a long stem it is called a spike, if on one 

 side of the stem forming a one sided spike it is called a 

 raceme; if they form a flat topped cluster as in elder, 

 yarrow, apple, it is called a cyme; if the branches 

 bearing- the flowers are all the same length, as in car- 

 away, parsnip, fennel, it is an umbel; if the flowers 

 have no peduncles but are gathered into a close head it 

 is a head or capitate cluster; if like red top grass, 

 oats, spirea, it is a panicle; if on a thick, fleshy 

 column like Jack in the Pulpit, or the wild turnip it is 

 a spadix. A perfect flower is one having both stamens 

 and pistils, and stamens and pistils alone constitute a 

 perfect flower, although both calyx and corolla may be 

 wanting. If a flower has no stamens or no pistils it is 

 imperfect ; if the stamens are present it is a staminate 

 flower, if the pistils are present we call it pistillate. 



A flower is symmetrical when there is the same 

 number of each set of organs and they are similarly 



