302 46. OLEAXDRA. 



Hab. Juan Fernandez. — This differs from the preceding by its firmer texture, 

 crenate piniire, and by not turning at all black when dried. Both have the stem 

 usually jointed a short distance above the base, as in J. Smith's Arthropteris. 



6. N. fioccigera, Moore; st. furfuraceous ; fr. 2-3 ft. 1., 8-12 in. br. ; pinnce 

 4-6 in. 1., f-| in. br., the apex acuminate, the edge crenated to a depth of 1 lin., 

 the base slightly unequal ; texture subcoriaceous ; rachis and under surface 

 furfuraceous ; sori in the crenations ; invoL^vm, reniform. — Hk. Sp. 4. p. 155. 



Hab. Java and Celebes. — Resembles exaltata in habit, but the pinnae are distinctly 

 crenated, and the sori placed at the tip of the lobes. 



7. N. davaUioides, Kze. ; cmid. short, stoloniferous ; st. tufted, 1 ft. or more L, 

 scaly towards tlie base ; fr. drooping, 2-3 ft. 1., 1 ft. or more br. ; lower pinnce 

 barren, 4-8 in. 1., ^-1 in. br., the apex acuminate, the edge inciso-crenate to a 

 depth of 1 lin. or less, fertile pinnse narrower, the lobes deeper and bearing each 

 a single sorus at the point ; texture subcoriaceous ; rachis furfuraceous, both 

 sides nearly naked ; invol. reniform. — Hk. Sj). 4:. p. 155. Fil. Ex. t. 60. 



Hab. Java. — Clearly distinguished by its pinnatifid fertile pinnse, with the sori at the 

 tip of the lobes. Ophioglossum acuminatum, Hout., is the oldest name. 



Gen. 46. Oleandba, Cav. 



Sori round, inserted in a row near the base or below the centre of the compact 

 free veinlets. Invol. reniform. A small genus, almost restricted to the Tropics, 

 distinguished from Nephrodium mainly hy habit, with wide-creepinq scandent shoots, 

 hinted stems, and entire lanceolate-elliptical fronds. Tab. V. f. 46. 



1. 0. neriiformis, Cav. ; shoots woody, suberect, clothed with adpressed scales ; 

 St. ^-1 in. 1., with the joint below the middle ; /a 6-18 in. 1., |-1^ in. br., 

 scattered, or in opposite pairs, or often in terminal whorls, narrowed gradually 

 towards both ends ; texture generally subcoriaceous and both sides naked ; sori 

 in two rather irregular rows near the midrib ; invol, oblique. — Hk. Sp. 4. p. 156. 

 {in part). Fil. Ex. t. 58. 



Hab. America — N. Granada and Guiana to Brazil and Peru ; Fiji, N". Guinea, Samoa, 

 Aneiteum, N. India (up to 6,000 ft.), Philippines, Malaccas, Guinea Coast. — A variable 

 plant, but we cannot distinguish clearly more than one species with firm suberect shoots. 

 0. phyllarthron, Kze., is a form with small, rigid, sessile fronds ; 0. micans, Kze. ; 

 0. hirla, Brack.; 0. mollis, Presl ; 0. trujulensis, Karst. ; 0. fiirtella, Miquel ; and 

 0. pilosa, Hk., are S. American plants, with thinner and more or less pilose fronds, and 

 with the sori often in an irregular wavy line not close to the midrib, as in 0. articulata. 



2. 0. imiscefolia, Kunze ; shoots firm, wide-climbing, clothed with adpressed 

 scales, curving upwards to where it bears the fronds singly or in tufts of 2 to 5, 

 and then downwards ; st. ^-1 in. 1, jointed close to the base ; fr. 6-12 in. 1., 1-1| in. 

 br., narrowed gradually towards both ends ; texture subcoriaceous, naked or 

 the midrib slightly pilose ; sori in two irregular rows near the midrib ; invol. 

 obUque.— i»/<?«. Fll. Ind. p. 240. 



Hab. Ceylon and Malay Isles. — Well distinguished from the preceding by its different 

 mode of growth. 0. Moritzii, Kunze, is a form with more scattered fronds and sub- 

 squarrose scales. 



3. O. aHiculata, Cav. ; shoots firm, suberect, wide-climbing, clothed with 

 linear-subulate adj)ressed scales ; st. scattered, sometimes opposite but not 

 whorled, 1-2 in. 1., with the joint close to the base ; fr. 6-12 in. 1., l|-2 in. br. ; 

 texture subcoriaceous ; midrib beneath slightly scaly ; sori in two irregular 

 rows, often some distance from the midrib. — 0. neriiformis Hk. Sp. 4. p. 156. 



