XXVI 
ARTIFICIAL ANALYSIS OF THE ORDERS. 
Class V. ACROGENS, or ACOTYLEDONOUS, or 
CRYPTOGAMIC PLANTS. 
Sexes absent. Sporules in lieu of leaves. 
§ With a distinct axis of growth ; 
Thecse seated on the leaves. 
Ring of the thecae vertical . . . . 
Ring of the thecae transverse . . . . 
Ring wanting. 
Thecae 1 -celled, veinless . . . . . 
Thecae 1 -celled, ribbed . . . ’ . 
Thecae as if many-celled . . . . 
Thecae arising from the stem. 
Thecae enclosed in involucres. 
Involucres of the same form . . . . 
Involucres of two different forms 
Thecae naked. 
Thecae sessile in the axil of leaves or bracts 
Thecae stalked. 
Thecae valveless, with an operculum 
Thecae opening into valves, with an operculum 
Thecae opening into valves, without an operculum 
leafy. 
POLYPODlACEiE, p. 400. 
GleicheniacejE, p. 401. 
Ophioglossace^, p. 402. 
OsMUNDACEiE, p. 402. 
DANiEACE^, p. 402. 
Marsileace^, p. 404. 
Salviniace^, p. 405. 
Lycopodiace^e, p. 403. 
Bryace^e, p. 407. 
Andr^ace^, p. 411. 
JUNGERMANNIACEiE, p,. 412. 
§§ With a distinct axis of growth ; leafless. 
Charace/e, p. 415. 
§§§ With no distinct axis of growth. 
Surface with stomates. 
Thecae opening into valves, with an operculum 
Thecae valveless, wuthout an operculum 
Surface without stomates. 
Aquatics ..... 
Terrestrial or aerial. 
With a thallus .... 
Without an evident thallus 
. JUNGERMANNIACEiE, p. 412. 
. Marchantiace^, p. 412. 
. Algace^, p. 430. 
. Lichenace.e, p. 42G. 
. FUNGACEiE, p. 419. 
