PA A key 
Page. 
PIGS. 1—3,165/1., ASPLENTOPTERIS (PINNATIOLDA™ IBD: NOV oeeecesicnsoessenee cee eeenieceneeseeeneee 118 
1. Portion of a sterile compound pinna from the upper part of the plant......-.. 118 
1s. Binnulesof dimacnifieds scence sete secs accesses: so hose ee eee eee eee eee 118 
2. Portion of a compound pinna from the lower part of the frond...-..........-. 118 
2°, Portionfofca pinnawmapnitedsnssseeeenc cere se .ceee soe ces cose eee sees eer es 118 
J. MragmentOfcaapinn NO ies seria meet er enn “ae ae seis eae See eee ee eee 118 
6. Portion of a fertile compound pinna slightly restored .............----..------ 118 
Gu SoriiofGrenlarged Sane ones maces sata oe eee cee ee ere) ee eee 118 
6>, Portion from near the tip of the pinnule enlarged, to show the nerves. .....--- 118 
q-perar mentor a pinnnle partly, trucmted ees== = ees eveeeee seaieeee sees 118 
Vics. 40. ROLYPODIUM DENTATUM, SPN Nias eyes eae eee teen eens eee ace ee 105 
ASMrasment Of a tertiles pinn & «<<. clex ce cscs sce cisseoe see eee eee eee 105 
4s Portion of-4;mapninedencaes mera sat eee eee ee ee 105 
5. wROrtions Of wosterile pinn wmeaeecsose eee ce eee ete eee eee eee nee 105 
oo binnules tof So mapnifiedie: sceneries canse se eecticstetee oe Geen eee eee 105 
Via. SUCLADOPHLUBIBUPETIOUATA, Sp. NOVeeseas ce ea eeises See eee eee eee eee ee eee ; 80 
S.Hrapinent or anmltimate pinnaess-a-sess= 4 seeeeee oe eee eee eee meee eee eee 80 
Seino ule eMlarp ed ocace ee seo aero ee eS One eete ee ee ee ee eee 80 
Fia. 92 ASPIDIUM: DUNKERE SCHIMpPGL Sp eeeee cn eeee dese cere ee eee eee eee ee eee 101 
9. Eortion/of a fertilevtrond ase cc on--a ae ae cae eee eee eee eee ee ee eee 101 
9°, Magnified pinnule, showing the lower side..--....-.-..----. ---- -------------- 101 
9. Magnified pinnule, showing the upper side...-=...........-..---------------- 101 
WiGss) OW PxcormeRiseBROWNIANAUD Unikom 222 eeee see see eee eee eee ee 88 
10. Fragment of compoand pinna from Fredericksburg. .---.. --- aap mielsce sae 88 
11. Fragment of a compound pinna collected by Meek at Baltimore............--- 88 
11; Pinnulerofsllamagnitied Secs ce.- sees ose eens eee nee oe ee ee 88 
FG. 2; (PECOPTERIS OVA TODEN TATA ISD ail OV =e eee = = aaa ie ee eee ee eee eee 85 
12: Small trasment ofan ultimate pinnaees \--- ees eeeeee eee ee se ee eae oe aoe 85 
12*, Pinnule of 12 magnified, to show nervation ..........- Seieseisee Ssbodsbons 6s5656 85 
Fic. 13. PECOPTERIS STRICTINERVIS, Sp. NOV...----------- Roc ogee EadbeSdsecesne ear 65 84 
13: End ‘of-anvultimate spinnar cease eee eee cance eee ee eee 84 
139. Pinnules.of J3imagnified i. ces sosstencmceceeciee ee. Reese once eee 84 
atte 3 es 
a 
Ceres “a ws 
=3e 
ee 
