

NATURAL ARRANGEMENT. 



Flowers perfect. Sepals herbaceous. COMMELYNACEAE. p. 333. 



Sepals and bracts glumaceous. XYRIDACEAE. p. 334. 



GROUP 6. Flowers imbricated with glumaceous bracts and dispos- 

 ed in spikelets ; proper perianth none or rudimentary. Ovary 

 1 -celled, 1-ovuled. Embryo at the extremity of the albumen next 

 the hilum. 



Sheaths closed. Glume or bract single. CYPERACEAE. p. 335. 

 Sheaths open on one side. Glumes in pairs. GRAMINEAE. p. 354. 



SERIES II. 



CRYPTOG'AMOUS OR FLOWERLESS 

 PLANTS. 



PLANTS destitute of proper flowers (stamens and pistils), and 

 propagated by spores instead of seeds. 



. ; ,fl-*1*T> IvV^lHR % ^ 



CLASS III. 



ACRO'GENOUS PLANTS. 



VEGETABLES with a distinct- axis, growing fromthe apex, with no 

 provision for subsequent increase in diameter (containing both 

 woody and vascular tissue), and usually with distinct foliage. 



Leafless: Stems jointed, striated. EQUISETACEAE. p. 390. 

 Leafy: Leaves mostly from rhizomas, and circinate. FILICES. p. 391. ^ 



" Stems creeping, or erect, mostly branching. LYCOPODIACEAE. p, 399. 

 Aquatic : Spores borne at the base of the leaves. HYDROPTERIDES, p. 402. 



CLASS IV. 



AN'OPHYTES OR SUPEPIOR CELLULAR 

 PLANTS. 



VEGETABLES composed entirely of cellular tissue or parenchyma, 

 with acrogenous growth, usually with distinct foliage, sometimes 

 the stem and foliage confluent into a frond. 



Tufted : leafy ; spore-cases opening by a lid. Mcsci. p. 403. 

 Oftenfrondose ; spore-cases rupturing at apex. HEPATICAE. p. 422. 



CLASS V. 



THAL'LOPHYTES OR VEGETABLE 

 EXPANSIONS. 



PLANTS wholly cellular, developing themselves (often indefinite- 

 ly) in leaf-like expansions, or in rounded masses, or congeries of cells, 

 but with no clear indication of a distinct root, stem, or foliage. 

 Frondose subcoriaceous or crustaceous expansions. LICHENES. p. 431. 



