93 145 
I have not seen the type-specimen but numerous specimens from the type- 
locality collected by AnsENE (RB). Unfortunately they are all sterile and without 
rhizome. Judging from these specimens I cannot with certainty distinguish them 
from JD. thelypteris, which has not been found in tropical America; Dr. Curist‘ 
however, finds that it differs from D. thelypteris by its plane fertile segments and 
minute, remote sori. I, therefore, prefer to let it stand provisionally as a species. 
It is widely different from all other tropical American species of $ Lastrea by its 
non-attenuate lamina and normally furcate veins. 
138 D. siambonensis (Hieron.) C. Chr., Revision nr. 63 fig. 41. 
Area: Argentina. 
139. D. achalensis (Hieron.) C. Chr., Revision nr. 64. 
Area: Argentina. 
140. D. Sprengelii (KIf.) O. Ktze.; C. Chr. Revision nr. 65 fig. 42; Smiths. Misc. 
Coll. 52: 387. 
Area: West Indian Islands, common; Mexico along the Andes to Ecuador. 
Nephrodium Sherringii Jenm. Journ. Bot. 1879: 261, from Jamaica, of which I 
have now seen an authentical specimen (Kew), I regard as a large, luxuriant 
variety of D. Sprengelii. It agrees with typical Sprengelii in colour, texture and 
pubescence, but it is much larger with pinne 12—20 cm long, 3—5 cm broad, the 
segments of larger pinnz about 3 cm long, '/»cm broad, deeply lobed with the 
tertiary veins furcate or even pinnately branched in the lobes. 
141. D. struthiopteroides C. Chr., Smiths. Misc. Coll. 52: 388. 
Area: Guatemala. 
142. D. Mercurii (A. Br.) Hieron.; C. Chr. Revision nr. 66 fig. 43; Smiths. Misc. 
Coll. 52: 389. 
Area: Mexico along Andes to Ecuador. 
It is highly questionable, whether this is specifically distinct from D. Sprengelii. 
I am nearly sure that it is not. Specimens from Panama (Maxow nr. 4696 and 5767) 
show the pubescence of D. Mercurii but are otherwise [not different from D. Sprengelii. 
143. Dryopteris conformis (Sod.) C. Chr. Index 258.€1905. — Fig. 16 b. 
Syn. Nephrodium conforme Sodiro. Rec. 45. 1883; Cr. vasc. quit. 240. 1893. 
Type from Ecuador, leg. Soprro (Kew!); very typical specimens were 
collected at Mt. Pifi by A. MrrrE (RB). 
In texture, habit and size very like D. Sprengelii, but lamina throughout 
shortly pubescent, mostly so on the coste of both sides but the leaf-tissue of both 
