63 309 



50. Dryopteris tenerrima (Fée) Rosenstock, Hedwigia 46: 122. 1906. 



Syn. Aspidium tenerrimum Fée, Cr. vase. Brés. 1: 134 tab. 43 fig. 1. 1869.— 

 Aspidium elatior Fée, 1. c. 132 lab. 42 fig. 3. 



Type from Brazil: Rio, leg. Glaziou n. 1223,2367 (HH!), also n. 2366 (HH = 

 A. elatior Fée). Rio Grande do Sul, Jürgens & Stier n. 181, 184 (HR). This distinct 

 species, incorrectlj' united by Baker with D. Sprengelii, which belongs to a different 

 group of species, is a near ally of D. pachyrachis and D. palustris, differing from 

 both by its much broader pinnæ, from the former by its very thin texture. 



Rhizome described as erect. Stem strong, ca. 15 cm. long. Lamina very thin, 

 grassgreen, glabrous except on the costæ above, the underside with a few yellow 

 glands. 2—3 pair of very reduced pinnæ; developed pinnæ with a distinct aëro- 

 phore at their base. Segments with the half of their own breadth between them, 

 acute, the larger ones often more or less incised-toothed and with furcate veins, 

 the basal pair often a little shorter. Veins generally simple, 10 — 12 to a side, 

 rather distant and few in proportion to the up to 2 cm. long segments. Sori about 

 medial, rather small; indusium as a rule jpersistent, oochlamyoid, with a few yellow 

 glands, else glabrous. 



Aspidium elatior Fée is not at all different from D. tenerrima, judging from 

 our fragmentary specimen and according to Fee's figure, which exactly covers a 

 pinna of Glaziou n. 1223 by Fée himself referred to D. tenerrima. The difference 

 in shape of lamina described by Fée, A. tenerrimum having a "lamina pyramidata", 

 while A. elatior is said to have "frondulis infimis remotis, abbreviatis", does not 

 exist. The shape of the lamina of the two proposed species is that of type III. 



A fragment in HC from Columbia: Santa Marta, H. H. Smith n. 997, agrees 

 with D. tenerrima in nearly ail its characters, yet its segments are obtusely rounded 

 and much more closely placed with only 8 — 9 pairs of veins. 



51. Dryopteris recumbens Rosenstock, Hedwigia 46: 123. 1906. 



Type from Brazil: Rio Grande do Sul, leg. Jürgens n. 172, etc. vide Rosen- 

 stock 1. c. 



Resembling D. tenerrima in texture and broad leaf but different in pubescence 

 and position of the sori. 



52. Dryopteris amphioxypteris (Sod.) C. Chr. Ind. 251. 1905. 



Syn. Nephrodium amphioxypteris Sodiro, Recensio 51. 1883; Cr. va.sc. quit. 

 230. 1893. 



Type from Ecuador: Andes of Quito, leg. Sodiro (HC). 



Resembles mostly D. pachyrachis in the number of veins (7—10) and in the 

 pinnæ tapering gradually from a broad base to a long acuminate apex as in the 

 underside of the lamina being furnished with red glands, but the sori are placed 

 near the margin and the stipe is rather slender; texture thin, herbaceous. Rachis 

 with deciduous soft hairs, cosUe on both sides strigilose, the lamina otherwise 



