FERNS OF THE MALAY-ASIATIC REGION. 
0 
base gradually narrowed to a broad petiole, so bcoriaceous, green, margin 
crisped when dried, areolae with a secondary interior network; stipe of 
fertile segment far exceeding the sterile, commonly 10 cm high, “spike' 5 
narrow, 2.5 cm long, mucronate, sporangia 40 on a side. 
Timor. 
The preceding 7 species constitute with us the subgenus Eu-ophioglossum ; 
there is no general agreement as to the limitations of the sjjecies in this group. 
Besides those here enumerated, Christensen cites 0. parvifolium Grev. & Hook., 
from Malacca and India ; it is not improbably a form of 0. pedunculosuin , as 
stated by Matsumura and Hayata. There seems to be another species in Minda- 
nao, but my material does not justify describing it. 0. macrorhisum Kze.. a 
South American plant, has been ascribed doubtfully to the Philippines. 
8: Ophioglossum intermedium Hooker. (Plate I, A.) 
Rhizome terrestrial and on rotten logs ; stipe erect, about 10 cm high, 
merging into the blade; sterile blade about 10 cm high, oblaneeolate, 
entire or lobed near the apex, obtuse, veins reticulate without free in- 
cluded veinlets; fertile segment arising from the sterile and equaling 
or somewhat overtopping it. 
Borneo, Java, Mindoro, New Guinea. 
9. Ophioglossum pendulum L. 
Rhizome epiphytic, giving rise to a number of pendent fronds; stipe 
up to 10 cm long, merging into the blade; sterile blade 20 to 100 or 
even 150 cm long, 2 to 6 cm broad, simple or more often forked, usually 
sinuate, fleshy-coriaceous but drying thin, veins reticulate with large 
areoles and no included veinlets; fertile segments one or often a pair, 
springing from below the middle of the sterile blade, short-stalked, with 
a fleshy spike 3 to 10 cm or more long. 
Mauritius to India, Formosa, Yakushima, New South Wales, and Hawaii. 
10. Ophioglossum simplex Ridley. 
Terrestrial, rhizome short and tuberous, with few roots; fertile fronds 
solitary, or two together, slender, flattened, with a blunt apex, 10 to 20 
cm long, 3 mm wide, dark green; sterile division represented by a very 
small lateral process, or quite absent; fertile portion of frond about 3 
cm long, with a stipe of less than this length above the sterile rudiment. 
Sumatra, Siak, wet forests on the Kelantan River. 
2. BOTRYCHIUM Swartz. 
Frond pinnate in plan, in most species several times pinnate and 
deltoid, the fertile segment as much branched as the sterile, or more so; 
sporangia globose, not immersed, opening by a transverse slit. A genus 
