322 76 



68. Dryopteris Canadasii (Sod.) C. Chr. Index 256. 1905: Hieron. Hedwigia 



46: 339. 1907 — [Fig. 44]. 



Syn. Nephrodium Canadasii Sodiro, Recensio 48. 1883; Crypt. vase. quit. 236. 

 1893. 



Type from Ecuador, leg. Sodiro (HC!). A slightly different specimen from 

 Santa Ines et Playa, leg. Stübel n. 883 a (HB). 



An excellent species, resembling mostly D. Mercurii, but very distinct by its 

 rachis, costae and costulae beneath being cinereo-tomentose, densely clothed with 

 short, stellate hairs as in D. Stùbelii, from which it differs by its eglandulose 

 under surface and its basal segments being somewhat abbreviated. Both surfaces 

 between the veins very shortly pubescent, on the costae and veins above setose. 

 Sori small, almost medial. Pinnae l'/2 dem. long, 2^1-2 dem. broad; segments with 

 rounded apex or sometimes subacute, patent or a littte falcate, linear, 3 mm. broad. 

 Veins 17—20 jugate. 



StiibeTs specimen differs from the type by its thinner pubescence, most 

 hairs being simple. 



69. Dryopteris lasiopteris (Sod.) C. Chr. Ind. 274. 1905; Hier. Hedwigia 



46: 332. 1907 — [Fig. 45]. 



Syn. Nephrodium lasiopteris Sodiro, Recensio 45.1883; Cr. vase. quit. 242. 1893. 



Type from Ecuador, leg. Sodiro (HC!). — I also refer here a specimen from 

 Columbia: Galipan, Moritz n. 106 b (HB) and fully agreeing with the type is a 

 plant from Costa Rica: Tablazo, 1900 m., P. Biolley ^^11906 n. 67 pt. (HC). 



A well-marked species, distinguished by its densely ochraceo-pubescent rachis 

 and falcate segments, which are only Va— ''/i cm. long with 10—15 close veins to 

 a side; shape of lamina agreeing with type IV, reduced pinnæ only 1—3, very 

 small, upper ones without aërophore. Stem very long; texture thin but firm. 

 Upperside sparsely hairy only along the costæ, underside rather densely pubescent 

 on eostæ and eostulæ. Basal segments of the lower pinnæ sometimes considerably 

 reduced. Sori a little above the middle of the vein with a deciduous, pubescent 

 indusium. — Near D. rudis but smaller, glabrous between the veins and with 

 fewer veins. 



70. Dryopteris Christensenii Christ, Bull. Boiss. II. 7:263.1907. n. sp. - [Fig. 46]. 



Costa Rica: Tablazo, 1900 m. Bords de l'eau, leg. P. Biolley ix/jtjoe. 

 n. 67 pt. (HC). 



Eudnjopteris rhizomate (ereeto?); stipitibus griseis, brevissime pubeseenlibus, 

 e. 8 cm. longis. Lamina laneeolata, 6 — 7 dem. longa, medio 2 dem. lata, acuminata, 

 versus basin subabrupte attenuata, membranacea, raehibus costisque utrinque bre- 

 vissime pubescentibus, pagina superiore minutissime puberula, inferiore costulis 

 puberulis cxeeptis glaberrima, eglandulosa, bipinnatifida. Pinnis 30—40 jugis, 



