198 ANALYSIS OF THE NATURAL ORDERS. 



f Styles and stigmas 3, distinct, (h) 



h Leaves rush-like. Ovary of 3 one-seeded carpels. # JuNCAorxE^:. 135 



h Leaves linear, lanceokte, etc. Ovary 6 — CO -seeded. Melanthace^e. 149 



k Petals yellow, small but showy. Plant acaulescent. Xyeidace<e. 153 



k Petals white, minute, fringed. Plant acaulescent. Eeiocaulonac^j-:. 154 



G Cohort 7. GRAMINOIDE^E. 



IT Flower with a single bract (glume). Culm solid, sheaths entire. Ctpeeace^:. 155 

 •f Flower with several bracts (glumes and pales). Culm hollow. Sheaths 



split on ono side. Gbahineje. 156 



H Province, ACROGENS. 



S Plants with well developed foliage. (If) 

 If Leaves few, mostly ample and from subterranean rhizomes, (a) 

 a Fruit borne on the leaves which are often more or less contracted. Filices. 160 

 a Fruit borne at the base of the radical, entire or lobed leaves. Maesileacejs. 157 

 If Leaves numerous, small, mostly spirally imbricated on the stem, (b) 

 b Fruit axillary, sessile, opening by a slit. Lycopodiace^:. 158 



b Fruit mostly terminal and usually stalked, opening by a lid. Musci. 162 



1 Leaves numerous, small, imbricated on the stem in 2 rows. > ^^ 



5 Plants with the leaves and stem confounded, thallus-likc. } 

 § Plants with verticillate branches instead of leaves, (c) 



c Fruit in terminal spikes, and of one kind only. Eqctsetace.e. 159 



c Fruit lateral, scattered on the branches, and of two kinds. ChaeacejE. 161 



K Province, THALLOGENS. 



Plants aquatic, with a colored thallus. Fruit immersed in the frond. Alce. 164 



Plants on dry rocks, logs, or bark of trees, tbmlloid or granular. Licchens. 165 



Plants growing on decaying organisms. Thallus cotton-like,_tho fruit very 



different, all without chlorophylle or starch. Funm. 16S 



Note.— Six Orders of the Cryptogamia, No?. 161-166, are necessarily excluded. In the ful- 

 filment of our plan, these extensive Orders will constitute a separate and independent volume. 



