POPULAR FLORA. 203 
CLASS II.—ENDOGENS OR MONOCOTYLEDONS. 
Stem having the wood in threads or bundles, interspersed among the pith or 
cellular part, not forming a ring or layer, and not increasing by annual layers. ° 
Leaves parallel-veined, not branching an@ forming meshes of network. To this 
some Arums, Trillium, Greenbrier, &c. are exceptions, having more or less netted 
veins. 
504 
500. Endogenous stem of one year old, shown in aCorn-stalk. 601. One of several years old, of Palmetto. 
Parallel-veined leaves of the two kinds: 502. that of Lily of the Valley ; 503. one of Callan 504. Magnified 
eeetlopiel the seed of Iris, showing the small monocotyledonous embryo, 605. Plantlet of Iris growing from 
the seed. 
Flowers with their parts mostly three or six, never five. 
Embryo monocotyledonous, i. e. of only one true seed-leaf: so in 
germination the leaves are all alternate or one above another. ‘ 
Except the Palmetto and one or two Yuccas at the South (Fig. 
79), and some Greenbriers, all the Endogens of this country are herbs. 
In warmer climates there are many Palms and other woody plants of the class, all 
having an appearance very different from our common trees and shrubs (113, 114). 
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