MONOCOTYLEDONS. 



1. ACOTYLEDONS. 



The first division, containing but one class, in sub- 

 divided into six orders, and includes in addition to the 

 Imperfect or Cryptygamous plants, a few aquatics of 

 very simple structure, associated together in the order 

 Naiades, whose character is by no means well de- 

 fined. 



2. MONOCOTYLEDONS. 



This division embraces three classes, the first hav 

 mg its stamens inserted beneath the germen, the sec- 

 ond having them inserted into the calyx or corolla, and 

 ihe third having them united to the pistils. 



Class 1 . Stamens Hypogynous. 



Calyx inferior, Corolla wanting, Germen simple, 

 Leaves alternate and sheathing. 



1. Aroidece. — Flowers on a spadix, usually situated on 

 the summit of a leafless stalk ; exemplified in Arum, 

 Calla, Pothos and Acorns. 



2. Tijphce. — Flowers aggregate, monoecious ; calyx 

 three leaved ; style simple. Examples, Typha' and 

 Sparganwm. 



3. Cypcroideo3. — Flowers united or monoecious, each 

 enclosed in calycine valves. Germen simple, surr 

 mounted by two or three stigmas. Seed naked or 

 arillate, sometimes enclosed in bristles or hairs 

 arising from its base. Culm terete, or three sided, 

 usually knotless. Sheath of the leaves entire. 

 This order embraces Grasses of a coarse texture, 

 exemplified in the Rushes, Sedge, and Cypress 

 grass. 



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