198 ANALYSIS OF THE NATURAL ORDERS. 



f Styles and stigmas 3, distinct, (h) 



h Leaves rush-like. Ovary of 3 one-seeded carpels. JUNCAGINE^E. 135 



h Leaves linear, lanceol&te, etc. Ovary 6 GO -seeded. MELANTHACE^E. 149 



k Petals yellow, small but showy. Plant acaulescent. XYBIDACE^E. 153 



k Petals white, minute, fringed. Plant acaulescent. ERIOCAULONACK^E. 154 



ft COHORT 7. GRAMINOIDE^E. 



1 Flower with a single bract (glume). Culm solid, sheaths entire. CYPERACE.E. 155 

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



split on one side. GBAMINEJ:. 155 



H PROVINCE, ACROGENS. 



Plants with well developed foliage. (IF) 



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

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

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

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

 b Fruit axillary, sessile, opening by a slit. LYCOPODIACE.E. 15S 



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



T Leaves numerous, small, imbricated on the stem in 2 rows, i 

 Plants with the leaves and stem confounded, thallus-like. f 

 Plants with verticillate branches instead of leaves, (c) 



c Fruit in terminal spikes, and of one kind only. EQUISETACE.E. 159 



C Fruit lateral, scattered on the branches, and of two kinds. CHABACEJE. 161 



K PROVINCE, THALLOGENS. 



Plants aquatic, with a colored thallus. Fruit immersed in the frond. ALG^E. 164 



Plants on dry rocks, logs, or bark of trees, thalloid or granular. LICHENS. 165 



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

 different, all without chlorophylle or starch. Fux<w. 165 



NOTE. Six Orders of the Cryptogamia, Nos. 161-1 6G, arc necessarily excluded. In the ful- 

 filment of our plan, these ex^nsive Orders will constitute a separate and independent volume. 



