114 21. ADIANTUM, EUADIANTUM. 



by the texture and one-sidedness of their segments. One group has flabellato-cuneate 

 segments, but still without any distinct midrib, whilst a few species have equilateral 

 segments, and approach in habit Pteris and Schizoloma. The veins only anastomose 

 in four species out of sixty. TAB. II. f. 21. 



Euadiantum. Veins not anastomosing.-^ Sp. 1-57. 

 * Frond simple. Sp. 1-2. 



1. A. reniforme, L. ; St. tufted, polished, chesnut- brown, 4-6 in. 1. ; fr. or- 

 bicular-reniform, 1|-2| in. across, with usually a broad open sinus; texture 

 subcoriaceous ; sori all round the edge, l|-3 lin. br. Hk. Sp. 2. p. 2. t. 71. A. 

 Fil. Exot. r t. 8. /3, A. asarifolium, Willd. ; st. stronger, 6-12 in. 1. ; fr. 2-4 

 in. br., thicker in texture, with a deep narrow sinus, the basal lobes sometimes 

 even overlapping. #. Sp. 2. p. 2. t. 71. B. Fil. Exot. $.11. 



Hab. a, Madeira and Teneriffe ; /3, Mauritius and Bourbon. 



2. A. Parishii, Hk. ; st. tufted, slender, naked, dark-brown, polished, J-^ 

 in. 1. ; fr. ^-1 in. each way, suborbicular, slightly undulated, cuneate at the 

 base ; texture papyraceo-herbaceous ; veins not prominent ; sori few, placed in 

 crenations of the frond, in. br.Hk. Sp. 2. p. 237. v. 3. 1. 142. A. Fil. Exot. t. 51. 



Hab. Moulmein, Malayan Peninsula ; discovered by the Rev. C. S. Parish. 



** Radicantes -group. Frond essentially simply pinnate, the rachis often elongated 

 and taking root at the apex. Sp. 3-6. 



3. A. lunulatum, Burm. ; st. 4-6 in. 1., tufted, wiry, naked, polished, dark 

 chesnut-brown ; fr. 6-12 in. L, 2-3 in. br., simply pinnate, often elongated and 

 rooting at the extremity ; pinnae f-l in. br., \-\ in. deep, subdimidiate, the 

 lower edge nearly in a line or oblique with the petiole, the upper edge rounded 

 and, like the bluntly-rounded sides, usually more or less lobed ; petioles of the 

 lower ones spreading, \-\ in. 1. ; texture papyraceo-herbaceous, the rachis and 

 both surfaces naked ; sori in continuous lines along the edge. Hk. Sp. 2. p. 11. 

 Hk. & Gr. t. 104. A. dolabriforme, Hk. Ic. PI. t. 191. A. deflectens, Mart. 

 Hk. Sp. 2. p. 12. /3, A. tremulum, Kunze ; whole plant more slender, the pin- 

 nules smaller and more membranaceous. A. filiforme, Gardn. Hk. Ic. PI. t. 503. 

 Sp. 2. p. 15. 



Hab. Hongkong, Cochin China, Himalayas (4,000 ft.), southward to Polynesian 

 Islands and Tropical Australia, Madagascar, Zambesi Land, Angola, Guinea, Cape 

 Verde Islands, Tropical America, from Mexico southward to the Organ Mountains. 

 An easily-recognizable and widely-diffused species. The two varieties are evidently 

 connected together by gradual intermediate stages. When the upper edge of the pinnae 

 is much lobed, the sori appear transversely oblong, but in some of the specimens the line 

 is quite continuous. A. Philippense, Linn., adopted from Petiver, though described by 

 Linnaeus as simple, is figured by Petiver as pinnate, and is doubtless this species. 



4. A. Oantoniense, Hance ; st. slender, naked, polished, blackish, 2-3 in. 1. ; 

 fr. 4-6 in. L, f in. br., simply pinnate with a terminal pinna, or prolonged and 

 rooting at the extremity ; pinnce in 3 to 5 distant opposite pairs, | in. br.. -f in. 

 deep, suborbicular, nearly entire or slightly lobed, shortly stalked ; texture 

 pellucido-herbaceous ; rachis and surfaces naked ; sori few round the outer edge, 

 not contiguous, roundish or transversely oblong. 



t Except casually in A. macrophyllum, lucidum, and perhaps some other species. 



