— 348 - 



41. Pteris longifolia L.; Christ, 1. c. 106 (no. 549 e). 

 Hieronymus has recently (Hedwigia 54: 290 — 294, 1914) separated 



out from the true P. longifolia L., which is American, the Old Worlds 

 forms of P. longifolia as a distinct species P. vittata L., to which the 

 Koh Chang specimens consequently belong. 



42. P. biaurita L. P. quadriaurita var. biaurita Christ et var. 

 Grevilleana Christ, 1. c. 106 (non P. Grevilleana Wall.), — (no. 19 and 254). 



43. P. quadriaurita Retz. ; Christ, 1. c. 106 (excl. var.). 

 Hieronymus has recently (Hedwigia 55 : 325 — 375. 1915) elaborately 



dealt with the Asiatic forms of the cosmopolitic collective species P. qua- 

 driavrita. He gives very long and detailed descriptions of no fewer than 

 20 Asiatic species, the majority of them founded on a single or a couple 

 of specimens. I have tried to determine the two forms collected in Koh 

 Chang after the descriptions of Hieronymus. As could be expected, the 

 specimens do not agree in all details with so detailed descriptions, and 

 I cannot, therefore, with certainty determine the two forms. 



The first of these is possibly P. Blumeana Ag.; Hieron., 1. c. 360, 

 with which it agrees in its obtuse, subemarginate segments. It is a form 

 with a whitish band along the midrib of the pinnæ, a peculiarity found 

 in several of the species (no. 785). 



The second form is probably identical with 



44. P. aspericaulis Wall.; Hieron. 1. c. 348. P. asperula Christ, 

 1. c. 107 (non J. Sm.), — (no. 632). Known from N. India only. 



45. P. tripartia Sw.; Christ, 1. c. 107, — (no. 578). 



46. Vittaria elongata Sw.; Christ, 1. c. 104, — (no. 76 and 722). 



47. Antrophyum reticulatum (Forst.) Klf. ; Christ, 1. c. 104, — (no. 745). 



48. Drymoglossum heterophyllum (L.) C. Chr. Ind. 246 ; D. pilosel- 

 hides (L.) Pr.; Christ, 1. c. 105, — (no. 128, 179, 416, 660 a). 



49. Taenitis blechnoides Sw.; Christ, I.e. 104, — (no. 400). 



50. Polypodium punctatum L. ; Christ, l.|c, 105, — (no. 234, 358, 745c)'. 



51. P. nigrescens Bl. ; Christ, 1. c. 105, — (no. 765). 



52. P. sinuosum Wall; Christ, 1. c. 105, — (no. 97). 



53. Cyclophorus adnascens (Sw.) Desv. ; C. Chr. Ind. 197; Niphobolus 

 adnascens Klf.; Christ, 1. c. 105, — (no. 806). 



54. C. acrostiehoides (Forst.) Pr.; C. Chr. Ind. 197; Niphobolus 

 acrostichoides Rieh.; Christ, 1. c. 105, — (no. 476). 



