78 96 
20. Stigmatopteris opaca (Bak.) C. Chr. comb. nov. 
Syn. Meniscium opacum Baker, Journ. Bot. 1877: 166; Sod. Cr. vasc. quit. 390. 
Dryopteris Christii C. Chr. Index 257, 1905. 
Type from Ecuador, leg. Soprro (authentical specimens in C!) 
Closely allied to St. alloéoptera, resembling it in size and its broad partly de- 
current pinne, differing by its thick texture, meniscioid venation and confluent 
sori. By these characters it resembles very much species of Meniscium, to which 
genus or subgenus it was hitherto referred. A minute examination of a specimen 
will, however, clearly show great differences between it and species of Meniscium, 
and further that it is in nearly all characters a true Stigmatopteris. The lamina 
is distinctly pellucido-punctate, simple hairs are wanting but rachis and cost 
beneath are sparsely clothed with small, reddish scales similar to those of other 
species of Stigmatopteris. The veins anastomose richly but not so regularly as in 
species of Meniscium, and the outer veinlets do not reach the margin but end in a 
clavate apex in the parenchyma; in Meniscium the outer veinlets always are 
united with the thickened margin. The sori are large and generally confluent as 
in Meniscium. 
21. St. caudata (Raddi) C. Chr. l. c. 302 fig. 12. 
Area: South Brazil. 
22. St. ichtiosma (Sod.) C. Chr. l. c. 302 fig. 13. 
Area: Ecuador-Colombia. Cuba, Jamaica. 
Additional synonyms: Polypodium dentatum Bak. Ann. Bot. 5: 456, 1891. 
Dryopteris longipetiolata C. Chr. Index 275, 1905. 
BAKER’s proposed new species, founded on a part of a leaf gathered in Ecuador 
by Sopiro (Kew!) is absolutely identical with Soprro’s species. SoprRO remarks 
(Cr. vase. quit. 642) that BAKER’s species does not exist in his herbarium, and he 
believes that it may be his Nephrodium crinitum f glaucescens, |. c. 251. It must 
be granted that it is impossible from BakEn's description to see, what his species 
may be; he compares it with P. decussatum and P. rude (!), which species St. ichti- 
osma is not at all related to. N. crinitum Sod. with its variety are forms of D. sub- 
marginalis. 
23. St. contracta (Christ) C. Chr. |. c. 304, fig. 14. 
Area: Costa Rica. 
24. St. pellucido-punctata C. Chr. l. c. 304, fig. 15. 
Type from Peru, Tarapoto, Mt. Guayrapurima, Spruce nr. 4720 (Kew!) A 
very large species, but bipinnatifid only. Stipe 1 cm. thick, rather scaly; pinna 
up to 45 cm. long, 7 cm. broad. 
