— 164 — 



Plac^io^^vria sumatrana, Rst., in Fed., Rep., XIII, 214; v. fl. v, R., 

 Mal. Ferns & Ali., Supplem. I, 244. 



This species is unknown to me.— H. R. B. Bunnemeijer's No. 4026 

 from Mt. Scloo, which may be this, is distinguished in having the stipes 

 similar to those of PI. subrigida v. A, v. R., the terminal pinna iobed with 

 the lobes serrate-crenate, the latéral pinnae acuminate. 



Platycerium coronarium (Kôn.), Desv., Prod,, 213; v.A.v.R., 

 Mal. Ferns, 711; Osnnmda coronarki, Kôn., in Miill., Naturforsch,, XXI, 



107. tab. m. 



An abnormal îorm, gdthered by W. Docters van Leeuwen in Sumatra 

 {Fort de Kock), differs from the type in having the fertile segment of the 

 soriferous frond deeply 2-partite, de secondary segments 2-partite again, 

 with the ultimate segments flabellately spreading, the 2 inner ones subparal- 

 lel, linear or linear-oblong, separated by a relatively narrow sinns, the 2 

 outer ones spreading at a right angle, somewlîat falcate, separated from the 

 inner ones by a broad. blunt or rounded sinus, the sorus occupying the 

 central portion of the whole segment, not or but slightly produced into 

 the base of the ultimate segments. (Forma monstruosa). 



P 1 e o c n e m i a s t e n o s e m i o i d e s, v. A. v. R. 



Caudex erectus, brevis, apice squamis fuscis, subulato-lanceolatis, 

 integerrimis vestitus. Stipites d: 15 — 30 cm. longi, frondium sterilium quam 

 fertilium breviores, obscure rufi vel castaiiei, cum rachide certe supra 

 castaneo-fibrilloso-tomentosi, ceterum glabri giabrescentesve. Frondes di- 

 morphae. Frondes stériles triangulari-ovatae, ± 15 — 20 cm. longae lataeque, 

 2-pinnatifidae. Pinnae firmiter herbaceae, glabrae; pinna terminalis deltoidea, 

 usque ad + 15 cm. longa, apicem acute acuminatum versus subintegerrima ad 

 crenato-serrata, basin versus sensim profunde pinnatifida, segmentis basal- 

 ibus crenato-Iobatis ad lobatis, basi plus minusve decurrentibus; pinnae 

 latérales 4: 2 — 3 utrinque, acuminatae; pinnae superiores elongato-lanceol- 

 atae, se^^mentis basalibus iis pinnae terminalis similibus sed paullo prof- 

 undius incisis, basi late adnatae decurrentesque, liberae vel cum pinna 

 terminali connatae; pinnae infimae maximae, breviter petiolulajae vel ses- 

 siles, pinnatifidae, basi abrupte cuneatae, rotundatae vel truncatae, segmentis 

 posticis productis, subfalcatis, usque ad + 7V2 mm. latis, obtusis, integer- 

 rimis vel lobato-crenatis. Segmenta omnia supra ad vel prope marginem 

 parcissime, brevissime et decidue fibrillosa. Frondes fertiles sterilium more 

 divisae et incisae sed minores et segmentis contractis. Sori partim rotundi 

 et ad apices venarum venularumve positi, partim elongati et venas venul- 

 asque anastomosantes occupantes; indusium obscure brunneum, fugax. 



Harren fronds much resembling a Stenosemia; main veins pinnate in 

 the segments; veins simple or forked, forming costal and a few costular 

 aréoles, for the rest free or anastomosing sparingly amongst themselves. 



Moist places in forest; ait. 350 m. 



Sumatra {Dell, Sibolangit, J. A. Lôrzing No. 5161, 4 June 1917), 



