PLAGE ai: 
Page. 
PGs. 1-3516,,7,, 9. HQUISETUM IVIRGINICUM, (spall Over eran ener eos eee ree ee ne eee ee eee 63 
1, 3. Apparently portions of the main stem, showing six teeth .........-....-.-- 63 
2,9. Apparently portions of rhizomes, with imperfect buds .-..........--...---. 63 
6. Large, much-branched) primary ? branch-..---.- .<..-- --2s-- --cc-- -scees -<-s 63 
7. Distorted irregularly branching form....- Ree pecans scocso ceecehocncce asinses 63 
Fic. 4,5. EQUISETUM ivEDLI; Mantel en: cna-seae tee e cae ee nee eee eee eee 65 
4, Pragment. ofa suiall stem! .-- 225) 2ao- es aac seen ae ees ae Soe ee eee eee 65 
5. Several fragments probably of the same plant...-.....--..----------------- 65 
8: Rhizome\?/of undetermined eiquisehwme-- =e. sales =e eee eee 65 
8%) Porbionvof8im ap miti ed esses aerele al saree eee etre al = ere atta 65 
Fia. 10: HQuiserum MARYLANDICUM, SDP. NOV ces. ace enia=-e a= a2 ee see eet eeeieeee 65 
10. Portion’ ofa branching stem seer at eee eee alee ee eee 65 
10%. Portion of a branch magnified to show the sheath..--...----.----.--------- 65 
Fic. 11. (CLADOPHLEBIS ICONSTRICTA NSP lO Viases eases a= ee eee 68 
11. Probably the upper part of the frond soon. en ne eo eee nee sae 68 
11%. Pinna from the lower part of the specimen, magnified to show details of ner- 
RIK) Mes er goSsa op aeo oS Ssab CoC Oo.0OSdec poceaaGacaaoasaasoseade Baaeice 68 
11>. Magnified pinna or pinnule from the upper portion of the specimen..-.....-. 68 
