4t>2 DICKSONIA. 



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

 grey-brown, asperous ; central pinnce oblong-lanceolate, 1-1^ ft. 1., 5-6 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 rigidly coriaceous ; both sides green, glabrous ; 

 valves of inc. round, rigid. 



Hab. New Caledonia, Vieillard, 2248, Deplanche. 



11*. D. Brackenridgei, Mett. ; arborescent ; fr. ample, tripinnate ; rachises 

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

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

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

 lin. br., and the rachis and tip ; texture rigidly subcoriaceous ; both sides 

 green, glabrous ; valves of inv. round, rigid. Ann. Sc, Nat. ser. 4. vol. 15. p. 81. 

 D. Berteroana, Brack. 



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

 and barren pinnules mixed together in the same pinnae. 



11*. D. thyrsopteroides, Mett. ; arborescent ; fr. ample, rhomboid, tripinna- 

 tifid ; central pinnce oblong-lanceolate, 12-15 in. 1., 4-5 in. br. ; pinnl. close, 

 ascending, ligulate, sessile, \ in. br., cut down to a narrow wing ; barren 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. Ann. Sc. Nat. ser. 4. vol. 15. p. 81. D. macrosora, Vieill. 



Hab. New Caledonia, Vieillard, 1634, 2209. Caudex 24-30 feet. 



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

 inciso-dentate, lower 4-nary segments. D. incisa, Fee, Fil. Ant. t. 25. fig. 1. 

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



Hab. Tropical America. 



19*. D. Henrietta;, Baker ; fr. 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. Antanarivo, Madagascar, Miss If. Baker. Most like D. cicutaria, var. incisa t 

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



24*. D. cuneata, Hk.; fr. ample, subdeltoid,4-pinnatifid; rachises stramineous, 

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

 - 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 ; veins subflabellate ; sori at base of ultimate sinuses ; inv. cup- 

 shaped, glabrous Hk. Sp. I. p. 80. t. 28. C. 



Hab. Philippines, Cuming. 



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

 lower pinnce 1 ft. or more 1., lanceolate- deltoid ; pinnl. and segm. close, lan- 

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

 4-nary lobes close, oblong, blunt, ^-1 lin. br., crenato-pinnatifid ; texture mem- 

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

 valves of inv. equal, hemisphei'ical, glabrous. Sitolobium samoense, Brack. 

 Fil. Amer. Exp. p. 274. t. 38. fig. 1. 



Hab. Samoa, Brackcnridge. 



