24. IIYPOLEPIS, EUHYPOLEPIS. 129 



Euhypolepis. Rhizome wide- creeping, fronds ample, tri- or quadripinnatifid. 

 Sp. 1-10. 



1. H. tenuifolia, Bernh. ; rhizome wide-creeping, puberulous ; st. 1 ft. 1., 

 strong, erect, slightly asperous, naked or pubescent; fr. 4-5 ft. 1., quadri- 

 pinnatifid ; lower pinnae ovate-acuminate, 12-18 in. 1., 6-9 in. br. ; pinnl. lan- 

 ceolate ; segm. rather distant, 1-1^ in. 1., ^ in. br., lanceolate, cut down to 

 the rachis into numerous linear-oblong toothed ultimate divisions ; texture 

 herbaceous ; rachises tomentose, the costa and sometimes the surface beneath 

 slightly hairy and glandular ; sori 2 to 6 to an ultimate division, placed at the 

 sinuses of the teeth. Hk. Sp. 2. p. 60. t. 89. C. and 90. A. H. dicksonioides, 

 We. Sp. 1. c. H. pallida, Hk. Sp. 2. p. 64. 



Hab. Java, Polynesian Islands, New Zealand, Australia, Norfolk Island. Closely 

 allied to this are a number of Javan forms, deseribed as species by Blume and Kunze, for 

 which I cannot give distinctive characteristics ; viz., 0. setigera, alpina, resinifera, poly- 

 podioides, javanica, and pallida of the former, rudis and stenophylla of the latter author. 

 For an account of these, reference may be made to Blume's " Flora," Hooker's " Species 

 Eilicum," and the volume of the " Linnaea" for 1848. H. resistens and amaurorachis of 

 Kunze are referred by Mettenius to Polypodium rugulosum. 



2. H. distans, Hk. ; st. 6 in. high, slender, flexuose, chesnut-brown, naked, 

 slightly asperous ; fr. about 1 ft. 1., 4-5 in. br., ovate-lanceolate, bipinnate ; 

 pinnce spreading at right angles with the rachis, distant, especially the lower 

 ones, lanceolate, 2-3 in. 1., ^ in. br. ; pinnl. oblong, the lower ones approaching 

 to deltoid, cut about halfway down ; texture herbaceous ; rachis scabrous but not 

 tomentose ; sori small, 2 to 4 to a pinnule, placed in the lower sinuses. Hk. 

 Sp. 2. p. 70. t. 95. C. 



Hab. New Zealand. Habit of a slender form of Athyrium fllix-foemina. 



3. H. anthriscifolia, Presl ; st. 1-2 ft. 1., strong, erect, straw-coloured, naked 

 but rather rough, with small raised points ; fr. ample, quadripinnatifid ; lower 

 pinnce deltoid-lanceolate, 1 ft. or more 1., 4-6 in. br. ; pinnl. lanceolate, rather 

 distantly placed, the segm. cut down to the rachis into small oblong deeply 

 pinnatifid ultimate divisions 2 lin. 1., \ lin. br. ; texture thinly herbaceous ; 

 rachis and under surface slightly hairy ; sori 2 or 4 to each of the ultimate 

 divisions, placed in the lower sinuses. Hk. Sp. 2. p. 66. t. 95. A. 



Hab. Bourbon, Mauritius, Cape Colony, Fernando Po. The fronds are said by Bojer, 

 who called \i Adiantum datum, to be from 10 to 18 feet in length. H. elata, Presl, 

 and H. aspera, Presl, appear to be forms of this species. This is generally a more flaccid 

 and more finely-cut plant than If. repens and tenuifolia; but some of the Fernando Po 

 specimens have the rachis brown and very rough. 



4. H. repens, Presl ; st. 1-2 ft. 1., strong, erect,, naked or puberulous, straw- 

 coloured, more or less densely prickly ; fr. 3-4 ft. 1., quadripinnatifid ; lower 

 pinnce 1-2 ft, 1., 6-12 in. br,, ovate-acuminate ; pinnl. about 6 in. 1., 1^-2 in. br., 

 lanceolate ; segm. oblong- lanceolate, blunt, cut down nearly to the rachis into 

 numerous bluntish lobes ; texture herbaceous ; rachises like the main stem ; sori 

 2 to 6 to a segm., placed at the sinuses. Hk. Sp. 2. p. 64. t, 90. C. /3, inermis, 

 Hk. ; st. and rachis not at all prickly. 



Hab. Tropical America, frcfm the West Indies southward to Brazil and Peru. 



5. H. nigrescens, Hk. ; st. 12-18 in. 1., strong, erect, glabrous, rather thickly 

 armed with strong prickles ; fr. ample, quadripinnatifid ; pinnae numerous, 

 spreading from the main rachis at right angles, the lowest 1 ft. 1., 6 in. br. ; 

 pinnl. 3-4 in. 1., 1-1^ in. br,, lanceolate, spreading or even deflexed ; segm. ovate- 

 oblong, cut down to the rachis below ; texture herbaceous ; rachises like the main 



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