97 
352. Dryopteris effusa (Sw.) Urban, Symb. Ant. 4: 16. 1903; C. Chr. Ind. 263. 
Syn. Polypodium effusum Sw. Prodr. Fl. Ind. occ. 184. 1788; Fl. Ind. oce. 1690. 
Schkuhr, Kr. Gew. 27 t. 26c. 
Nephrodium effusum Bak. Syn. 287; Jenm. Bull. Bot. Dept. Jamaica n. s, 3: 
111. 1896; W. Ind. and Guiana Ferns 225, 
Polypodium multifidam Jacq. Coll. 3: 187. 1789; Ie. pl. rar. tab. 643. 
Polypodium miser Hew. Mag. Nat. Hist. II. 2: 460. 1838, ex deser. 
Polypodium dilatatum Liebm. Vid. Selsk. Skr. V. 1: 208, 1849! © 
Lastrea grandifolia Pr. Epim. 39. 1849! 
Polypodium divergens Willd., Schkuhr, Kr. Gew. 27 tab. 26b (18062); Willd. 
sp. 5: 209! ; 
Phegopteris divergens Fée, Gen. 243. 1850—52; Mett. Fil. Hort. Lips. 83. 1856. 
Dryopteris ulvensis Hieron. 46: 346 tab. 7. fig. 18. 1907! 
Type from Jamaica, leg. Swartz (B! H!) — Sloane, Jamaica tab. 57, 
The typical form from Jamaica may be described as follows: 
Rhizome strong, short-creeping, sometimes branched, at the apex clothed with 
several large, ovate or lanceolate, subentire or faintly toothed, generally appressed, 
yellow-reddish or brown, opaque, thin scales. Stipites approximate, up to 1 cm thick 
and 50—100 cm long, brownish or stramineous, below with some deciduous, ovate 
or lanceolate, rather large, thin scales, upwards as a rule naked and quite glabrous. 
Lamina deltoid, probably reaching one meter in length and breadth, thinly herbace- 
ous to chartaceous, fresh green and shining above, 4-pinnate—5-pinnatifid, some- 
times 6-pinnatifid below, smaller forms 3-pinnate. Rachises of I—III. order glabrous” 
beneath, or, sometimes, stalks of secondary and tertiary pinne with several, patent, 
articulated hairs, above with a broad channel which is filled with a dense mass 
of very short, reddish hairs; primary rachis, rarely also the secondary, often with 
a scaly bud in the axil of an upper prima. Midribs of quaternary (tertiary) pinnze 
above shortly glanduloso-pubescent, upper surface otherwise glabrous. Underside 
glandulose by scattered, short, cylindrical, red, shining glandular hairs. Pinne 
alternate, the basal ones the largest, up to 50 cm long, their lower side consider- 
ably produced; middle and upper pinnz oblong, acuminate. Secondary pinne stalked, 
ovate-oblong, acuminate, somewhat unequal-sided, the anterior side being a little 
broader. Tertiary pinne of upper pinne (or quaternary pinne of basal primary 
pinnz) with a winged, short petiole, oblong, 1—2cm long, */2—1 em _ broad, the 
anterior basal one always the largest, all decurrent at the base, forming a distinct 
wing along the midrib of the secondary (or tertiary) pinne, their apices sharply 
acute, the margins more or less deeply pinnatifid into oblique or faleate, close, 
acute lobes, these entire or toothed, the larger ones shallowly lobed. Veins simply 
pinnate in the lobes, terminating shortly within the margin. Sori near the tip of the 
ultimate lobes, small, reddish, exindusiate ; receptacle with several shining red glands 
D. K. D, Vidensk. Selsk. Skr., naturvidensk. og mathem. Afd. 8. Reekke, V1, 1. 13 
