4:62 DICKSONIA. 



11*. D. Deplanchei, Vieill. ; arborescent ; fr, ample, tripinnate ; racUses 

 grey-brown, asperous ; central pinnce oblong-lanceolate, I-I5 ft. I., 6-6 in. br. ; 

 pinnl. lanceolate, nearly sessile, f-1 in. br. ; barren segm. close, ligulate-oblong, 

 inciso-crenate, or lowest subpinnatifid, 2-2^ lin. br., fertile consisting of 6-10 

 sori, and tip and midrib ; texture rigidry coriaceous ; both sides green, glabrous ; 

 valves of inv. round, rigid. 



Hab. New Caledonia, Vieillard, 2248, Deplanehe. 



11*. D. BracJcenridgei, Mett. ; arborescent; /r. ample, tripinnate; rachises 

 naked, grey-stramineous ; central pinnce oblong-lanceolate, 12-15 in. 1., 6-7 in. 

 br. ; pinnl. sessile, lanceolate, j-1 in. br. ; barren segm. lanceolate, close, denti- 

 culate, falcate, 2-2^^ lin. br., fertile ligul ate, consisting only of 8-10 spaced'sori, 

 ^ lin. br., and the rachis and tip ; teoitvre rigidly subcoriaoeous ; both sides- 

 green, glabrous ; valves of isM.. round, rigid.— j4m». Sc, Nat. ser, 4^ vol, 16, p. 81. 

 D. Berteroana, Brack. 



Hab. Fiji and Samoa. — Caudex 15 feet. Fronds in moat of our specimens with fertile 

 and barren pinnules mixed together in the same pinnae. 



11*. D. th/rsopteroides, Mett. ; arborescent ; fr. ample, rhomboid, tripinna- 

 tifid ; central pinnce oblong-lanceolate, 12-16 in. 1., 4-6 in. br. ; pinnl. close, 

 ascending, ligulate, sessile, -^ in. br., cut down to a narrow wing ; baiTen segm. 

 close, ligulate-oblong, dentate, fertile reduced to rachis, and 6-8 close sori, 

 ^ lin. br. ; texture rigidly coriaceous ; both sides green, glabrous ; valves of inv. 

 firm, round. — Ami. So. Nat. ser. 4. vol. 15ip. 81. D. macrosora, ,F«6J& 



Hab. New Caledonia, Yieillm-d, 1634, 2209.— Caudex 24-30 feet. 



19. D. mcularia, var. /3, incisa. Baker ; more compound than the type, with 

 inciso-dentate, lower 4-nary segments. — D. incisa, F&g, Fil. Ant. t. 26. fig^ 1. 

 Dennstsedtia D'Orbignyana, Kuhn, Linn, 36. p. 146. 



Hab. Tropical America. 



19*. D. HewrieU(», Baker ; fv. deltoid, 4-pinnate ; rachises stramineous, 

 naked ; pinnce deltoid, 7-8 in. 1, ; pinnl. deltoid, distinctly stalked, reduced 

 on lower side and cuneate-truncate at base ; segm. deltoid; stalked, cuneate- 

 truncate on lower side at base, cut down to rachis into oblong blunt toothed 

 lobes with a cuneate base ; texture moderately firm ; both sides bright-green, 

 glabrous ; venules distant, erecto-patent ; sori hemispherical, placed on upper 

 side of ultimate segments. 



Hab. Antanai-ivo, Madagascar, Miss H. Baker. — Most like D. cicutaria, var. incisa, 

 but pinnae and pinnules much fewer, and diminishing rapidly in size up the rachises. 



24*. D.cumeata, Hk. ; /r. ample, subdeltoid, 4-pinnatJfid; ractoiSs stramineous, 

 naked ; pinnce lanceolate, ^-1 ft. 1. ; pinnl. close, short-stalked, lanceolalte, 

 §-^ in. br. ; segm. oblong-rhomboid, 1-2 lin. br., inciso-pinnatifid, cuneate at 

 base, sessile, more cut away on lower side ; texture moderately firm ; both sides 

 green, glabrous; «e2»« subflabellate ; son at- base of ultimate sinuses ; 8«», cup- 

 shaped, glabrous — Hk. Sp. l.p. 80. *. 28. C. 



Hab. Philippines, Cvming,. 



26*. D. samoensis, Baker; fr, ample, 4-pinnatifid ; rachises thinly pilose; 

 lower pinnce 1 ft. or more 1., lanceolate- deltoid ; jti2««/. a,ni.segm. close, lan- 

 ceolate-deltoid, distinctly stalked, cuneate-truncate on lower side at base ; 

 4-nary lobes close, oblong, blunt, \-\ lin. br., crenato-pinnatifid ; texture mem- 

 branous ; ribs beneath hairy ; sori minute, placed at base -of ultimate sinuses ; 

 valves of inv. equal, hemispherical, glabrous. — Sitolobium samoense, Brack. 

 Fil. Amer. Exp.p, 274. t. 38.ftg. 1. 



Hab. Samoa, Brachewidge. 



