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. D. davallioides, R. Brown ; fr. tripinnate ; lower pinnce 6-9 in. 1., 3-4 in. 

 br. ; pint)!, linear-acuminate, cut quite down to the rachis ; seffm. oblong-rhom- 

 boidal, deeply inciso-pinnatifid ; racJds shining, not prickh% glabrous or nearly 

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

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

 —Hk. Sp. Fil. I. p. 71. 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. 



2.5. D. Smithii, Hk. ; fr. tripinnate ; lower pinnce 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. \ m 1., 2 lin. br. ; rachises slightly inciso-pinnatifid ; 

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

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

 p. 80. t. 28. D. 



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

 nules narrower and segments much smaller and less divided. 



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

 nate ; lower piunm 4-8 in. 1., lanceolate ; pinnl. quite distinct, 1-1^ in. 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 G to the lower segments ; invol. cup- 

 sliaped, subglobose, \ line across. — Hk. Sp. Fil. 1. p. 80. t. 27. B. D. deltoidea, 

 Hk. Sp. Fil. 1. p. 80. t. 27. A. Sitolobium strigosum, J. Sm. 



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

 1 ft. 1., 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, 1-1^ ft. 1. ; rachis stra- 

 mineous, glabrous ; ^j?H?i« lanceolate, nearly sessile, 3-4 in. 1., f-^ in. br. ; the 

 rachis flattened ; pinnl. 20-30-j ugate, lanceolate, sessile, cuneate at base, 1^-2 lin. 

 br., deeply pinnatitid ; 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, 



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



28. D. punctiloba, Hk. ; fi: 12-18 in, 1,, 6-9 in. br., lanceolate, bipinnate ; lower 

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

 pinnl. ovate-rhomboidal, about ^ in. 1., ^ 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 ; i7i.rol. subglobose, cup-shaped, 

 ^ hne across. — Hk. Sp. Fil. I. p. 79. D. pilosiuscula, Willd. 



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



29. D. appendiculata, Wallich ; /r. 12-18 in. 1., 6 in. br., lanceolate, bipinnate ; 

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



