N. sublucens Allen. 
Fig. i, natural size ; fig. 2, fertile node, X 2 5 5 fig- 3? entire leaf, X 5 ° ; fig- 4? 
tip of sterile leaf, X 2 5 > fig- 5? oospore; fig. 6, membrane of spore. 
N. paucicostata Allen. 
Fig. I, natural size ; fig. 2, fertile leaf, X 2 5 5 fig- 3? fertile, female node, X 2 5 5 
fig. 4, male node; fig. 5, tips of leaf; fig. 6, oospore, X 5° 5 membrane of 
spore appearing mottled (doubtless with a covering of close felt). 
N. pseudoflabellata A. Br. var. imperialis Allen. 
With plant natural size ; primary rays, and nodes of leaf with tips, X 25 ; with 
oospore, X 5° > and membrane of spore finely felted. 
N. PSEUDOFLABELLATA A. Br. var. ramuscula Allen. 
Fig. I, natural size ; fig. 2 , primary rays and nodes, X 5 ° 5 and terminals, 
X 5° > fig- 3? oospore, X 5° 5 fig- 4? membrane of spore with minute granulations 
on the thickened membrane. 
N. pseudoflabellata, A. Br. var. RAMUSCULA Allen, forma testa 
glabra. Allen. 
Fig. 1, natural size ; fig 2 , primary rays and nodes, X 2 5 5 fig- 3? oospore, X 5°- 
N. laxa Allen. 
Plate i. Natural size. 
Plate 2 . Fig. 1 , primary ray with fertile nodes and terminal, X 25 ; fig. 2, 
male node, X 2 5 > fig- 3? oospore, X 5° > fig- 4* spore-membrane (finely granular.) 
N. capitulifera Allen. 
Fig. 1, natural size ; fig. 2, terminals, X 5 ° 5 fig- 3 ? oospore, X 5 °- 
To accompany the last we addkwo engravings (see Bulletin of Torrey Botanical 
Club. . , . ). 
N. stellaris Allen. 
Fig. 1 , natural size ; fig. 2 , leaf with nodes and terminals, X 2 5 5 fig- 5? 
oospore, X 5°- 
N, subspicata Allen. 
Fig. 1, natural size ; fig. 2 , primary ray and fertile node, X 2 5 > fig s - 3 - 4 ? 
fruiting node and terminals, X 2 5 5 fig- 5? oospore, X 5°- 
