29 275 



tina. It is quite wrong to unite, as Baker does (in "Flora brasiliensis" and "Syn. 

 Fil."), the whole series of forms with D. opposita, as that species belongs to a 

 ditTerent tj'pe. The typical form of D. oligocarpa, as represented in Herb. Willd. 

 n. 19699, may be characterized as follows: 



Fig. 5. D. oligocarpa (H. B. Wilkl.) O. I\tze. From tlie type specimen. 



Rhizomate parvo, ereclo, apice squamis brunneis, minute pu bescent ibus 

 veslito. Stipitibus gracilibus, decidue hirtis, ad basin squamis paucis instructis. 

 I^amina lanceolata, ad 4 dem. longa, 1 dem. lata, tenuiter membranacea, laete viridi, 

 ubique + hirtis, maxime ad rachin et sublus ad costas, subtus eglandulosa vel 

 in speciminibus nonnullis minute aureo-glandulosa et inter venas pilis hamatis 

 brevissime puberula, ad basin breviter et gradatim attenuata (Typus I). Pinnis 

 alternis vel suboppositis, 5 — 7 cm. longis, 1'/» cm. latis, lanceolatis, acuminatis, 

 inferioribus 2 — 4 jugis sensim reductis, iniis c. '/a cm. longis vel auriculiformi- 

 bus. Laciniis approximatis, paulum oblicjuis, acutis vel subobtusis, basalibus vix 

 longioribus, interdum in pinnis inferioribus non reductis paulum abbrevialis. Venis 

 indivisis, 6 — 8 jugis. Soris margini approximatis, parvis. Indusiis raro repertis, 

 pubescentibus. Sporangiis glabris. 



The following specimens examined agree in the main with the type: 

 Jamaica: Blue Mountain, F. Børgesen 1906 (HH). 



Mexico: Misantla, Schiede n. 755 pt. (HB). — Orizaba, Bourgeau n. 2786 ( HB). — 

 Vallée de Cordoba, Bourgeau n. 1442 pt. (HH). — Mirador, Liebmann (HH, = Polij- 

 podinm concinniim Liebm. Vid. Selsk. Skr. V. 1: 204). 



Costa Rica: San José, 1169m., P. BioUey n. 101 (HC). 



Columbia: Cauca, Lehmann n. 2968 (HB), 3451 (HB. HC). — Porto Bello, 

 Billberg n.327, 330 (HS). 



Venezuela: Tovar, Moritz n. 41, 114 (HB, = P. consanyiiineiim Kl.) n. 41a 

 (HB, = P. oligosorum Kl.). — Caracas, Gollnier (HB). — Eggers n. 13182 (HH). 

 Ecuador: Quito, Hartweg n.l511 (HH). 

 Bolivia, M. Bang n. 2320 (HB). 



Aspidium losiesthes Kze., described from a plant cultivated in Herb. Berol. (HB), 

 is a common form, while Polijpodiiim consangiiineum Kl. differs in having more 

 pairs of reduced pinnæ, in the basal segments being somewhat longer and in the 

 somewhat revolute margins. The other specimens referred here vary but little, 

 and they may be easily distinguished from the allied species, D. concinna and 

 D. Columbiana, by the rachis and costæ being densely covered with long hairs, 

 from D. concinna also by its glabrous sporangia. Concerning the differences 



