118 CHRIST. 
parce araneoso-iloccosis ; soris in apice dentium pronmientihus in fron- 
dibus plene evolitis utroque costulae latere quinis senisve^ ultra segmenti 
dimidiam partem occiipantibus, ejTisque apice solnmmodo soris exempto. 
vix 1 mm. latis^ tenuiter coriaceis^ obscure brunneis non pruinosis; valvis 
inaequalihus exteriore semigioboso, interiore angustiore, ovato. 
Habitu Cyatheae magnae soris marginalibus praeditae. 
Hab. Makum, Luckinpore (C. B. Clarice 37812). Tonkin frangais, [P. Bon 
5408.) 
The most distinct form. 
w 
Cibotium Sumatranum n. subsp. 
Pinnulis fertilibus minorihxis, 8 mm. latia^ non usque ad costam ineisis^ 
ala 1 mm. lata utrinque superstite (sinubus obtusis separatls) 3 mm. 
longis, ligulato-obtusiusculis, denticulatis ; soris utroque costulae latere 
hinis rariiis ternis, basi segmenti insertis, a eosta remotis, minutis O.o 
ad 0.7 mm. latis; valvis subaequalibus, tenuiter coriaceis^ rufo-fulviSj baud 
prominentibus, margin! segmenti subparallelis^ non pruinatis. 
Hab. Sumatra, Linggalang Volcano, {Henry Rouycr 1005), Herb. Turic. 
More delicate in all parts, segments small, blunt, sinus rounded, the plant 
glabrous or nearly so. 
Cibotium Cumrngii Kunze Suppl. Schkuhr. 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-trlgonis, 
acutiSj 0.5 ad 0.7 cm. longis, decumbentibus^ minute subserrulatis^ costis 
costulisque dense rufo- aut alhido-puhescentihus; soro utroque costulae 
latere solitario, costae adpresso, magno^ 1.5 usque ad 2 mm. lato non 
prominente^ transverse ovato^ vaJde ohliquo usque ad verticali quoad 
marginem segmenti et costulam; valvis subaequalibus^ rigide coriaceis, 
dilute brunneis saepeque coeruleo-prmnatis. 
Hab, Philippines, Luzon, Mount Alagut 1,900 m., {Loher), Province of Benguet, 
Baguio, {Elmer 6027, 6503, C559). 
Hooker^ incorrectly unites Cibotium Cumingii Kze., with C. glaucescens Kze., 
1. c. 63. Tab. 31, as Kunze has well indicated the differences. 0. glaucescens was 
based on a cultivated, and as the illustration shows, an immature specimen, of 
imknown origin, the sori scarcely showing, and is almost without doubt identical 
with C Barunetz, in young stage of development, and should be reduced to that 
species. 
^ Sp. Fil. 1 : 83. . 
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