228 176 



224. Dryopteris macrotis (Hook.) O. Ktze. Rev. 3: 813. 1891; C. Chr. Ind. 276. 



Syn. Nephrodinm macrotis Hook. spec. 4: 86 tab. 242 B. 1862. 



Type from Peru: Tarapoto. Spruce nr. 3979 (aulh. specimens in RB and L.). 



The most developed form of a small group, which includes also the three 

 preceding species, characterized by the strigose upper surface of the lamina to- 

 mentose rachis and the reflexed lower pinnæ which like the upper ones are distinctly 

 auricled at the upper base and setose indusia. D. macrotis differs from the three 

 other species by its size; stipe and lamina 30—40 cm each, pinnae 10 — 15 cm long 

 by I'/a — 2 cm broad, the lower 2 — 3 pairs much reflexed, both surfaces adpressedly 

 strigose, rachis apparently without stellate hairs, in some specimens proliferous like 

 several other species of Goniopteris; veins 5— 6-jugate, very ascending, free and 

 connivent or not reaching the sinus, the basal ones sometimes truly united. 

 Rosenstock has named the forms with anastomosing veins var. nephrodioides in 

 Fedde, Repert. 7: 298. 1909, based on Spruce nr. 4658 from Peru Mt. Campana 

 (RB!); the .same character is found in specimens of Spruce nr. 3979. 



225. Dryopteris serrulata (Sw.) C. Chr. Ind. 292. 1905; Maxon, Contr. U. S. 



Nat. Herb. 10: 491. 1908. 



Syn. Polypodium serrulatum Sw. Schrad. Journ. 1800": 25. 1801; Fl. Ind. occ. 

 1663. (C. Chr. Arkiv for Bol. 9": 34 fig. 8 et t. 5 fig. 1; photograph 

 of the type-specimen). 

 Aspidium serrulatum Mett. Aspid. nr. 252. 1858. 

 Nephrodium serrulatum Jenm. Bull. Dept. Jamaica II. 3: 189. 1896. 

 '! Polypodium Lunanianum Hew. Mag. Nat. Hist. II. 3: 460. 1838 



(t. Jenman). 

 ? Polypodium Smithianum Hew. 1. c. 459 (t. Mett. msc). 

 Type from Jamaica, leg. Swartz (S!) 



A well-marked species, distinguished from related species by its pinnæ being 

 broadly serrate only, not pinnatifid, and its inframedial sori. The pinnæ resemble 

 in cutting those of Ü. pyramidaia, from which it differs by its lower pinnæ being 

 reduced, by its sessile or subsessile pinnæ and by its few veins. The whole leaf 

 is practically glabrous, the rachis and coslæ beneath alone slightly puberulous by 

 minute stellate hairs. Most pinnæ with truncate base, or the lower ones a little 

 narrowed and often auricled. Lobes generally broader than long, often emarginate. 

 Veins 4— 5-jugate, the lower 3 — 4 curved up to the sinus and the basal pair nor- 

 mally united and sending a branch to the sinus. Sori very often confined to the 

 lower veins (still in some specimens all veins are soriferous), distinctly inframedial, 

 often close to the costa. Indusium small, deciduous, furnished with a few furcate 

 hairs. Sporangia glabrous. — Generally the lower 2 — 3 pairs of pinnæ are gradu- 

 ally shortened, but this is not the case in all specimens. The species varies con- 

 siderably in size. The largest specimens measure: stipe 30—40 dem, lamina 8 dem, 



