CRYPTOGAMIA.— RHIZOCARPA. 37fl 



base to the summit. Involucrum scale-like, co- 

 vering each capsule. 



* * * Capsules destitute of a ring, adnate at the base, 

 subglobose, coriaceous, opakc, not cellular, semibi' 

 valved. 



609. OPHIOGLOSSUM. Capsules naked, upon an 

 articulated distichous spike, transversely open- 

 ins;, 2-valved. 



r,\0. BOTRYCHIUM. Capsules subglobose, adnate 

 to the rachis of the compound spike, distinct, 

 naked, 1-celled ; valves 2, connected behind, 

 transversely opening. 



LYCOPO DINERS. 



611. LYCOPODIUM. Capsules 1-celled, axillary 

 sessile ; some of them 2-valved, filled with a 

 farinaceous substance ; others 3-valvcd, con- 

 taining from 1 — 6 globose corpuscules. 



EQLISETACEJE. 



HI 2. EQJJISETUM. Fructification terminal, spiked, 

 consisting of peltate polygonous scales, on the 

 under side of which are from h — 7 follicular 

 involucra opening longitudinally on the inside. 

 Sporoz included in the involucrum, numerous, 

 <j;reen,) globose, with 4 filaments at the base 

 which are dilated at the extremity. 



miTZO( AHPA. 



<M3. SALVIN1A. Involucra imbricate, (4—9,) con- 

 nate, resembling a unilocular capsule. Spora: 

 inserted on a central receptacle. 



614. AZOLLA. Mono-icon*. Sterile? appendage* by 



pans, contiguous. Involucrum subglobose, re- 

 sembling a unilocular capsule. Sponr numer- 

 ous, naked. 



615. I80ETE& Capsule membranaceous, not open- 



ing, immersed at the ba-c of tin: frond. I •celled 



