54 13. DICKSONIA, PATANIA. 



is said to differ from this by its more flaccid fronds, and in the larger teeth of the seg- 

 ments ; and a plant (probably the same) was gathered in Tahiti by the American expe- 

 dition under Captain Wilkes. (See Brackenridge, p. 275.) 



24. I), davallioides, R. Brown ; fr. tripinnate ; lower pinnae 6-9 in. 1., 3-4 in. 

 br. ; pinnl. linear-acuminate, cut quite down to the rachis ; segm. oblong-rhom- 

 boidal, deeply inciso-pinnatifid ; rachis shining, not prickly, glabrous or nearly 

 so ; texture herbaceous, under surface slightly hairy ; sori 2 to 8 to a segment, 

 placed at the base of the sinuses ; inwl. subglobose, cup-shaped, j of a line across. 

 Hk. Sp. Fit. \.p.~l. D. nitidula, Kunze, Mett. Fil. Lips. t. 28. 



Hab. Australia, both temperate and tropical. Habit of growth lax, and texture of the 

 frond thinner than in any of the other species. Fronds 2-4 ft. 1. ; lower segments under 

 in. 1., 2-3 lines br., and finely cut. 



25. D. Smithii, Hk.; fr. tripinnate ; lower pinnae 9-12 in. 1., 3-4 in. br.; pinnl. 

 linear-acuminate, cut down to the rachis throughout, with rather distant, narrow, 

 acute segments; lower segm. in 1., 2 lin. br. ; rachises slightly inciso-pinnatifid ; 

 and under surface densely tomentoso -glandular ; texture subcoriaceous ; sori 

 2 to 8 to a segment ; invol. subglobose, cup-shaped, line across. Hk. Sp. Fil. 1. 

 p. 80. t. 28. D. 



Hab. Philippine Islands, Cuming. Itachises similar to those of D. flaccida, but pin- 

 nules narrower and segments much smaller and less divided. 



26. D. scabra, Wall. ; fr. 9-30 in. 1., 6-24 in. br., deltoid or lanceolate, bipin- 

 nate ; lower pinnce 4-8 in. L, lanceolate ; pinnl. quite distinct, 1-1^ in. 1., 1 in. 

 br., the lower ones cut down nearly to the rachis into numerous pinnatifid oblong 

 deltoid segments on both sides ; texture herbaceous or subcoriaceous ; rachis and 

 under surface more or less hairy; sori 2 to 6 to the lower segments ; invol. cup- 

 shaped, subglobose, ^ line across. Hk. Sp. Fil. 1. p. 80. t. 27. B. D. deltoidea, 

 Hk. Sp. Fil. 1. p. BO. t. 27. A. Sitolobium strigosum, J. Sm. 



Hab. India, from the Himalayas to Ceylon, Malayan Peninsula. Stipe sometimes 

 1 ft. L, asperous, very hairy below ; rhizome wide-creeping. 



** Entire frond not more than 12-18 in. long. Sp. 27-29. 



27. D. Elwesii, Baker ; fr. lanceolate, tripinnatifid, l-l ft. 1. ; rachis stra- 

 ^.^ mineous, glabrous ; pinnce lanceolate, nearly sessile, 3-4 in. 1., |- in. br. ; the 

 /'' rachis flattened ; pinnl. 20-30-j ugate, lanceolate, sessile, cuneate at base, l|-2 lin. 



* br., deeply pinnatifid ; segm. ligulate, erecto-patent, many entire parallel, lowest 

 on upper side bifid ; texture membranous ; both sides green, glabrous ; veins soli- 

 tary in the centre of each segment; sori filling up the tip of the segments, 

 H lin - r - 



Hab. Sikkim, near Lachen, 8,500 ft., H. J. Elwes. 



28. D. punctiloba, Hk. ; fr. 12-18 in. L, 6-9 in. br., lanceolate, bipinnate ; lower 

 pinnae lanceolate, 4-6 in. L, cut quite down to the rachis except at the top ; 

 pinnl. ovate-rhomboidal, about \ in. 1., J in. br., deeply pinnatifid ; texture thinly 

 herbaceous ; rachis and under surface more or less glanduloso-pilose ; sori 2 to 

 12 to a pinnule, placed at the base of the sinuses ; invol. subglobose, cup-shaped, 

 i line across. Hk. Sp. Fil. 1. p. 79. D. pilosiuscula, Willd. 



Hab. Temperate N. America, from Canada southward to Carolina and Tennessee. 



29. D. appendiculata, Wallich ; fr. 12-18 in. L, 6 in. br., lanceolate, bipinnate ; 

 lower pinnce linear-lanceolate, 3-4 in. 1., cut down quite to the rachis unless at 



I n\ 



