118 
CHRIST. 
parce araneoso-floccosis ; soris in apice dentium prominentibus in fron- 
dibns plene evolitis ntroque costulae latere quinis senisve, nltra segmenti 
dimidiam partem occupantibus, ej usque apice solummodo soris exempto, 
vix 1 mm. latis, tenuiter coriaceis, obscure brnnneis non pruinosis ; valvis 
inaequalibus exteriore semigloboso, interiore angustiore, oyato. 
Habitu Cyatlieae magnae soris marginalibus praeditae. 
Hab. Makum, Lnekinpore [G. B. Clarke 37812). Tonkin frangais, (P. Bon 
5408.) 
The most distinct form. 
Cibotium Sumatranum n. subsp. 
Pinnnlis fertilibns minoribus , 8 mm. latis, non nsqne ad costam incisis, 
ala 1 mm. lata ntrinqne snperstite (sinubus obtusis separates) 3 mm. 
longis, ligulato-obtusiusculis, denticulatis ; soris ntroque costulae latere 
binis rarius ternis, basi segmenti insertis, a costa remotis, minutis 0.5 
ad 0.7 mm. latis; valvis subaequalibus, tenuiter coriaceis, rufo-fulyis, baud 
prominentibus, margini segmenti subparallelis,.non pruinatis. 
Hab. Sumatra, Linggalang Volcano, ( Henry Rouyer 1905), Herb. Turic. 
More delicate in all parts, segments small, blunt, sinus rounded, the plant 
glabrous or nearly so. 
Cibotium Cumingii Kunze Suppl. Schlcuhr. 1 : 64. 
Pinnulis 1.3 ad 1.5 cm. latis, fere ad costam incisis, segmentis con- 
fertis, sese tangentibus (sinubus paene nullis aut acutis) ovato-trigonis , 
acutis , 0.5 ad 0.7 cm. longis, decumbentibus, minute subserrulatis, costis 
costulisque dense rufo- aut albido -pubescentibus; soro utroque costulae 
latere solitario, costae adpresso, magno, 1.5 usque ad 2 mm. lato non 
prominente, transverse ovato, valde obliquo usque ad verticali quoad 
marginem segmenti et costulam; valvis subaequalibus, rigide coriaceis, 
dilute brunneis saepeque coeruleo-pruinatis. 
Hab. Philippines, Luzon, Mount Alagut 1,900 m., {Loher) , Province of Benguet, 
Bag-uio, ( Elmer 6027, 6503, 6559). 
Hooker 1 incorrectly unites Cibotium Cumingii Kze., with C. glaucescens Kze., 
1. c. 63. Tab. 31, as Kunze has well indicated the differences. C. glaucescens was 
based on a cultivated, and as the illustration shows, an immature specimen, of 
unknow origin, the sori scarcely showing, and is almost without doubt identical 
with C. Baranets , in young' stage of development, and should be reduced to that 
species. 
x Sp. Fil. 1: 83. 
