88 18. DAVALLIA, HUMATA. 



sori 1 to 6, minute, axillary, the tube stalked, the mouth truncate. V. D. B. 

 Hym. Jav. t. 21. T. Pluma, We. lc. PL t. 997. 



Hab. Borneo, Java, Samoa, Bourbon. A very singular plant, with the segments 

 spreading in all directions, and not at all flattened. T. Pluma of Hooker appears to 

 be a long narrow form of this species, in habit singularly resembling a bottle-brush. 



78. T. fceniculaceum, Bory ; st. nearly tufted, erect, wiry, 2-4 in. 1., naked or 

 tomentose ; fr. 4-8 in. 1., 1^-3 in. br., erect, rigid, ovate-lanceolate ; main rachis 

 naked or slightly winged above; lower pinnae spreading or erecto-patent, 1-1| 

 in. 1., cut down quite or very nearly to the rachis ; pinnl. regularly pinnatifid, 

 with simple or forked linear-filiform segm., 1-1^ lin. 1., colour dark-green or 

 brownish-black when dry, texture subcoriaceous ; sori 2 to 12 to a pinna, minute, 

 axillary, the mouth rather spreading but not two-lipped. Hk. Sp. 1. p. 135. 

 (in part). 



Hab. Mauritius, Bourbon, Borneo, and Rockingham Bay, Australia (T. setilobum, 

 F. Mueller, MSS.). Intermediate between rigidum and longlsetum, the segments rather 

 flattened. 



TRIBE 4. DAVALLIE^E. 



Sori marginal or submarginal, roundish, covered by a reniform or suborbicular 

 squamiform involucre, which is open at the apex, fastened broadly at the base, and 

 open or free at the sides. GEN. 18-19. 



GEN. 18. DAVALLIA, Smith. 



Sori intra- or submarginal, globose or elongated either laterally or vertically. 

 Invol. terminal on the veins, various in shape, united or free at the sides, the apex 

 always free. Caps, stalked. A large genus, which has its head-quarters in the 

 Tropics of the Old World. Fronds various in size and division, herbaceous or 

 coriaceous ; veins always free ; rhizome usually wide-creeping and scaly. There 

 are four principal types in the shape of the involucre (see plate), of which 

 Microlepia connects Eudavallia with Dicksonia and Odontoloma with Lindsaya. 

 TAB. II. f. 18. 



Humata, Cav. Invol. ample, coriaceous, suborbicular or reniform, attached by a 

 broad base, the apex and sides free. Sp. 1-11. Fronds in all coriaceous, usually 

 deltoid, 3 to 6 inches long, more or less distinctly dimorphous, the barren ones hardly 

 more than once pinnatifid. All plants of the Malayan islands, one reaching the 

 Himalayas and the Mauritius. Sp. 12 is an anomalous simply pinnate S. American 

 plant, which seems best placed here. 



* Barren fronds entire. Sp. 1-2. 



1. D. (Hum.) heterophylla, Smith; rhizome wide-creeping, scaly ; fr. shortly 

 stalked, 3-6 in. 1., 1 in. br,, glabrous ; texture coriaceous, the sterile one ovate- 

 lanceolate, entire or slightly lobed at the base, the fertile one narrower, deeply 

 sinuato-pinnatifid ; sori 2 to 10 to a lobe. Hk. Sp. 1. p. 152. Fil. Ex. t. 27. 

 Hk. & Gr. Ic. Fil. t. 230. 



Hab. Malayan Peninsula and Polynesian Islands. 



2. D. (Hum.) angustata, Wallich ; rhizome wide-creeping, scaly ; fr. subsessile 

 or shortly stalked, 3-8 in. 1., ^-f in. br., linear, slightly and irregularly crenate 

 at the margin, sometimes once forked ; texture coriaceous, both surfaces naked ; 

 sori in a row along the edges. Hk. Sp. \.p. 152. Hk. $ Gr. lc. Fil. t. 231. 



Hab. Malayan Peninsula and Islands. 



