Distribution of Dicksoniaceae in Malesiana    Genus DICKSONIA               D. archboldii   K     D. blumei   DFM   D. grandis   K     D. hieronymi   HK     D. lanigera   K     D. mollis   CDL    D. sciurus   K                         Genus CYSTODIUM                C. sorbifolium   ACDHJK                         Genus CIBOTIUM               C. arachnoideum   CM   C. barometz   FIMx  C. cumingii   L                        Genus CALOCHLAENA (CULCITA)     C. javanica   CFGL    C. straminea   AHLy C. villosa   DK
				LEGEND A=Admiralty Is (2 species) B=Bismarck Arch.(-) C=Borneo (4 species) D=Celebes (4 species) E=d’Entrecasteaux Is. (-) F=Java (3 species) G=Lessa Sunda Is. (1 species) H=Louisiade Arch. (3 species) I=Malay Peninsula (1 species) J=Moluccas (1 species) K=New Guinea (7 species) L=Philippines (4 species) M=Sumatra (3 species) x=Asia y=Australasia & Pacific
				Cibotium barometz (Dist. in Asia - NE India to S China & Taiwan, southwards to Malaysia) Calochlaena straminea (Dist. in Pacific - Samoa, Fiji, New Caledonia, Vanuatu, Solomon Is.) N.B. Apart from the Dicksonia's & Calochlaena straminea, others listed here in the Dicksoniaceae tend to be mainly prostrate and don't really rank as 'treeferns'.
	ARTIFICIAL KEY TO MALAYSIAN GENERA (CYATHEACEAE & DICKSONIACEAE) Upper surface of costae of ultimate leaflets raised; fronds roughly elliptical, mostly bipinnate    Young parts of plant protected by scales and hairs .   .   .   .   .   .   .   .   .   .   Cyathea    Young parts of plant protected by hairs only       Outer indusium not distinct from rest of lamina          Pinna-rachis raised on upper surface; fertile pinnules deeply lobed .   .   .   .   .   .   .   .   .   .   Dicksonia          Pinna-rachis grooved on upper surface; fertile pinnules not lobed .   .   .   .   .   .   .   .   .   .   Cystodium       Outer indusium quite distinct from lamina of leaflet .   .   .   .   .   .   .   .   .   .   Cibotium Upper surface of costae of ultimate leaflets grooved, the groove decurrent into the groove of the supporting rachis; fronds deltoid in outline, 3-4 pinnate .   .   .   .   .   .   .   .   .   .   Calochlaena (Culcita) KEY TO THE MALAYSIAN SPECIES OF DICKSONIA Base of stipe clothed with dark red spreading hairs 30-50 mm long; hairs of under-coat pale, slender or flaccid, much shorter    Hairs of under-coat of stipe-base, and most hairs on lower surface of pinna-rachis and costae, pale, slender, rigid, spreading, not flaccid; spores smooth .   .   .   .   .   .   .   .   .   .   D. blumei    Hairs of under-coat of stipe-base, and smaller hairs on lower surface of pinna-rachis (in some cases also of costa) short, pale, flaccid, their lateral walls collapsed; spores verrucose       Hairs on costae almost all flaccid, pale, somewhat antrorse, matted .   .   .   .   .   .   .   .   .   .   D. mollis       Hairs on costae mostly rigid, each cell evenly cylindrical          Hairs on costae: some flaccid, some spreading, mostly pale .   .   .   .   .   .   .   .   .   .   D. sciurus          Hairs on costae ascending, mostly dark red .   .   .   .   .   .   .   .   .   .   D. archboldii Base of stipe clothed mainly with soft matted red-brown hairs, with or without a smaller number of stout rigid dark red hairs    Some stout rigid spreading dark red hairs present near base of stipe, and scattered also on pinna-rachis; pinna-rachis mainly clothed with a close layer of pale matted flaccid hairs .   .   .   .   .   .   .   .   .   .   D. hieronymi    No stout rigid spreading dark red hairs mixed with softer hairs on stipe-base       Pinna-rachis rather dark and somewhat glabrescent; costae bearing flaccid pale hairs mixed with thicker dark hairs with pale bases .   .   .   .   .   .   .   .   .   .   D. grandis       Pinna-rachis brown, persistently hairy beneath; costae bearing entirely pale flaccid hairs .   .   .   .   .   .   .   .   .   .   D. lanigera KEY TO THE MALAYSIAN SPECIES OF CIBOTIUM Sori 2 or more pairs on each pinnule-lobe of larger fronds; largest pinnules 20-35 mm wide; pinnules on the two sides of a pinna not greatly different in length; hairs on lower surface of costae and costules almost always thin and flaccid, never spreading .   .   .   .   .   .   .   .   .   .   C. barometz Sori never more than 2 pairs on each pinnule-lobe; largest pinnules 15-25 mm wide; pinnules on basiscopic side of lower pinnae much shorter than those on acroscopic side; some rigid hairs usually present with flaccid ones on lower surface of costae, the rigid hairs sometimes spreading    Always one pair of sori; spreading hairs usually present on lower surface of costae; hairs normally absent on lower surface of lamina between veins .   .   .   .   .   .   .   .   .   .   C. cumingii    Always two pairs of sori on large fronds; spreading hairs lacking, but rigid (often red) appressed hairs always present and sometimes abundant; small flaccid hairs present on lower surface of lamina between veins .   .   .   .   .   .   .   .   .   .   C. arachnoideum KEY TO THE MALAYSIAN SPECIES OF CALOCHLAENA (CULCITA) Inner indusium smaller than outer; midribs of quaternary leaflets rather closely hairy on lower surface; mountain plants    Largest quinary lobes commonly with only one sorus .   .   .   .   .   .   .   .   .   .   C. javanica    Largest quinary lobes commonly with 2 or 3 sori .   .   .   .   .   .   .   .   .   .   C. villosa Inner indusium at maturity larger than outer, pouch-shaped and not reflexed; midribs of quaternary leaflets sparsely hairy; lowland plants .   .   .   .   .   .   .   .   .   .   C. straminea