ItlCKSONIA. (>7 



Proi/r. Xor. Ihill. p. lo7. IJahiiiliiiin antuicticuin, Vn-sl. 

 Cibotiuin Billardiori, Kaiilf. 



Hall. Van Dienien's \.a\u\, LahiUaidiere, Brown. Raviius in llic moun- 

 tainous parts (if the island, an«l close to the sea on the soutlieni shores, 6'mhu, 

 li(ickh<msi\ ./. ]). Hunker. Snnimit of the Blue Mountains, New Holland, 

 Allan Cuniiiiui/taiii, IN23. — 'J'his is truly a noMe arlxivescent Kern, with a 

 trunk or caudex ;U)— 3."> Icel hif^h. It is" well represented in the plate of a 

 "rem valley, Nan Diemen's Land," in Mr. Haekhouse's ' Narrative of a 

 Visit to the Australian Colonies.' With a trunk, however, more lofty than 

 that of D. arborcsccns, and fronds prohably e(iually large, the pinnules and 

 segments are very much smaller, not one fourth part of the size, and the 

 apices of the pinnae and pinnules are more acuminated. The sori are small, 

 but ecjually copious on the segments, which are but little contracted in con- 

 sequence of their presence. Fine living plants of this Fern exist in the green- 

 house of the Royal Gardens of Kew, and in that of His Grace the Duke <>t 

 Devonshire, at Chatsworth. 



3. 1). Selhu'iaua, Hook. ; arborescent, Ironds suprade- 

 compound coriaceous glabrous, general and partial ])inn;e 

 scarcely acuminated at the apex, the latter oblong-lanceo- 

 late, ])innides and segments ovate acute piuigent incise >- 

 srrrate, fertile ones ])innatirid scarcely altered, sori small, 

 general rachis quite smooth. (Tab. XXII. B.). lialautium 

 Sellowianum, Pr., [accordi)ui to specimens /row Hie lioynl 

 Berlin HerJxiriuni). Dicksonia Organica, I\Iiers, MS. in ./. 

 Sm. Gen. Fit. {name only). 



Hab. Brazil, Sclloir. Organ Mountaijis, J. Micrs, Esq. in Herb, tiostr. — 

 In general appearance, in the size of the pinntE, pinnules and ultimate seg- 

 ments, and in the size and form of the involucres, this has an exact aflinity, 

 except in the pinufe not being so much acuminated, with the preceding, D. 

 nntarctica : nor can I detect any dirtcreucc, save the less acuminated pin- 

 nre, and the perfectly smooth, not rough, main rachis. 



4. D. Berteroana,\loo\i.; arborescent, fronds decompound 

 (tripinnate at least) coriaceous glabrous, pinnie all acumina- 

 ted, ultimate ])inna3 or j)innulcs crowded oblong acuminate 

 broader and imbricated at the base ])innatifid almost to the 

 rachis, segments obloiig-ovate acute somewhat ])inigent sub- 

 falcate serrated the lower ones free (ultimate pimiulcs) ierlile 

 ones narrower more elongated almost all free de("])ly ])innali- 

 fid into 7 or 8 lobes each of which bears a rather l.irge sorus, 

 stipes slightly rough more or less woolly. (Taij. XXIll. A.) 

 Balantium Berteroaninn, Kutize, Anal. Plerid. p. 40. Daval- 

 lia.'' an sj). n.? an gen. distinct.? Berlero MS. in Herb, nostr. 



Hal). Thickly wooded jdaees on ihe elevated mountains of Juan Fernandez, 

 Birlcro, n. IfjlW. — Caudex (5 — 1.5 feet high, Bvrtrro. — Here again we have 

 a DicLiouia nearly allied to I), aiilurclica and D. Scllouionii, yet from a 

 widely dilfcrent Ideality to either of them. It is however more distinct from 

 ihem^ than they are Ir.im caeli other. 'J'he ultimate pinna- and pinnide.^ 

 and segments are much mnr(> c ruwded, their bases literally imbrii aliug each 



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