205 257 



Rhizomale oblique-erecto, squamis stellato-pilosis sparse onusto. Stipitibus 

 subfasciculatis, foliorum steriliuni 10 — 20 cm, fertiliiim 30 — 40 cm longis, angularibus, 

 sparse et decidue squamosis, glabiis. Lamina ovata, 15 — 18 cm longa, 12 — 15 cm 

 lata, griseo-viridi, membranacea, rachi minute stellato-puberula costis pinnarum 

 subtus sparse et microscopice hirtis exceptis glaberrima, sed paginis densissime ver- 

 rucosis, ad insertionem pinnæ lateralis supremae gemma magna squamosa bulbilli- 

 fera, pinnata cum impari. Pinnis lateralibus 2— 4-jugis, alternis, infimis breviter 

 petiolulatis, supremis sessilibus, lanceolato-ellipticis, 12 cm longis, 2 — 2'/2 cm latis, 

 ad basin breviter contractis, versus apicem acuminatis, grosse serrulatis vel lobu- 

 lars. Lobis approximatis, subfalcatis, obtusis vel antice aculis, 5 — 6 mm longis, 

 4 — 5 mm latis. Venis simplicibus, valde ascendentibus, 8— 9-jugis, inferioribus 3—4 

 ad sinum conniventibus, omnibus liberis et saepe interruptis, infimis interdum 

 anastomosantibus meniscioideis. Soris parum inframedialibus, indusiis minimis, ci- 

 liatis, raro repertis. Sporangiis glabris. 



This new species agrees with D. obliterala in shape and cutting of the pinnæ 

 and partly also in venation, but it differs considerably from that species, its nearest 

 relative, by the few pinnæ, gemmiferous rachis, thinner texture, both surfaces 

 being densely warted by small raised points, and by its variable venation. Most 

 often the veins are all free, but one can in the same pinna find all intermediate 

 states of venation, from all veins being free to 2 — 3 pairs anastomosing and then 

 the lowermost pair is often meniscioid. The anterior basal vein springs constantly 

 out from the costa, which is not the case in D. obliterata. In all specimens seen 

 the fertile leaves have a longer stipe than the sterile ones. 



259. Dryopteris obliterata (Sw.) C. Chr. Ind. 280. 1905. 



Syn. Polypodiiim obliteratum Sw. Prodr. 132. 1788; Fl. Ind. occ. 1660; Bak. in 

 Hk. Icon, plant, tab. 1669. Jenm. Bull. Dept. Jam. n. s. 4: 132. 1897. 

 Phegopteris obliterata Mett. Pheg. nr. 46. 1858. 

 Polypodiiim faucium Liebm. Mex. Bregn. 57 (Vid. Selsk. Skr. V. 1 : 209). 1849. 



Type from Jamaica, leg. Swartz (S!). 



Rhizome shortly creeping with a few densely stellato-pilose scales. Stipes sub- 

 distant, 4 — 5 dem long, quadrangular, greyish-stramineous, glabrous. Lamina with 

 6—10 pairs of shortly stalked, alternate, lateral pinnæ and a similar but often larger 

 terminal pinna, firmly membranous or papyraceous, sometimes nearly coriaceous, 

 generally greyish green, microscopically puberulous on rachis and costæ beneath, 

 otherwise glabrous; hairs of rachis stellate. Pinnæ 12— 20 cm long by 2— 3 cm broad, 

 acuminate, shortly attenuate towards the base, serrate or shallowly lobed. Teeth 

 oblique, acute, not much longer than broad. Veins 6— 8-jugate, the lower two pairs 

 generally thinly anastomosing and sending a branch to the narrow membrane, to 

 which the next 2 — 3 pairs are connivent; in Central-American specimens theilowest 

 or sometimes the two löwer pair of veins are meniscioid. Sori in two convergent 

 rows, the lower ones being about medial, the upper ones gradually approaching the 



