POLYPODIACEAE > AT 
1. DRYOPTERIS Adanson (Nephrodium Rich.) 
Rootstocks creeping or erect, the stipes scattered or clustered, not jointed 
to the rootstock. Fronds elongated, simply pinnate or 2- to 4-pinnate, the 
veins free, or the lower ones anastomosing and forming on each side of the 
midribs of the pinnules a single row of regular deltoid areolae with an 
excurrent veinlet springing from the apex, free or jointed in the angle of 
the next upper anastomosing veins, often forming one or more rows of 
rhomboid areolae between the costal ones and the margin. Pinnules mostly 
equilateral, entire, toothed, or lobed, glabrous, puberulent, or ciliate. Sori 
numerous, medial or submarginal, in regular rows on the veins. Indusium 
usually reniform, attached by the sinus, deciduous or persistent. (Greek 
“oak” and “fern.”) : 
Species about 800 in all parts of the world, about 100 in the Philippines. 
1. Fronds simply pinnate. 
2. Basal pinnae reduced to small, auricular appendages less than 1 cm 
[esphaiataer rnin ea ee RS oe a 1. D. basilaris 
2. Basal pinnae not reduced, or only slightly so. 
3. Veins anastomosing, the ultimate lobes not extending more than 
UMMA CREE. EXELL IY co oo act gcd paras es octane hcnwinpeg 2. D. parasitica 
3. Veins free, the ultimate lobes extending nearly to the midrib. 
3. D. luerssenti 
1, Fronds more divided, bipinnate or tripinnatifid, at least the lower pinnae. 
2. Only the lower pinnae again pinnate, the upper part of the frond 
simply pinnate; frond glabrous .....................--:c-::se-00-+ 4. D. dissecta 
2. All the pinnae again pinnate; frond prominently white-ciliate on the 
oT ols hr OE as gat a IR lid aa ARLEN 5. D. setigera 
1. D. basilaris (Presl) C. Chr. 
Rootstocks stout, suberect, the stipes tufted, 15 to 40 cm long, somewhat 
sulcate and angled, usually puberulent, the base clothed with long, filiform, 
brown, spreading scales. Fronds 30 to 65 em long, 15 to 20 cm wide, 
oblong, acuminate, simply pinnate, more or less puberulent, the base abrupt, 
but with 8 to 16, distant, mtich-reduced, auricular, orbicular to ovate pinnae 
less than 1 cm long along the stipe, the normal pinnae lanceolate to linear- 
lanceolate, rather close, spreading-ascending, slenderly acuminate, alternate, 
sessile or subsessile, 25 to 40 on each side, 7 to 10 mm wide, 10 to 14 cm 
long, the base slightly inequilateral, subacute or somewhat truncate, the 
margins coarsely toothed. Sori small, numerous, 3 to 5 in a row on each 
side of the primary veins, the indusium persistent. 
Along small streams on ledges, San Juan del Monte; widely distributed in 
the Philippines. Endemic. 
2. D. parasitica (L.) O. Ktze. 
Rootstock short, stout, erect, clothed with linear brown scales on the 
young parts, the stipes glabrous or puberulent, with few scattered scales 
near the base, 10 to 50 cm tall. Fronds oblong, 20 to 50 cm long, simply 
pinnate; pinnae 8 to 15 pairs, slenderly acuminate, base truncate, the basal 
ones not reduced, oblong to lanceolate, 4 to 10 em long, pinnately lobed one- 
third to one-half to the midrib into numerous, ovate to oblong, obtuse, falcate 
lobes, glabrous or somewhat puberulent, the veinlets anastomosing near the 
