71 317 



sori, known to me, by its lamina being reduced very abruptly downwards. From 

 D. diplazioides, which species it resembles in its obtuse rounded segments, it also 

 differs by the basal veins running out to the edge above the sinus, and by its 

 more deeply incised pinnæ. 



62. Dryopteris Glaziovii (Christ) C. Chr. Ind. Fil. 268. 1905 — [Fig. 40]. 



Syn. Aspidiam Glaziovii Christ, Bull. L'Herb. Boiss. II. 2: 633. 1902. 



Type from Brazil (loco non indicato), leg. Glaziou n. 5267 (HH!). 



Eiidryopteris rhizomate? (verisimiliter repente); stipitibus longis (in specimine 

 incompletis), stramineis, glabris, superne sulcatis. Lamina lanceolata, sursum sen- 

 sim attenuata, versus basin abrupte attenuata, 6 dem. longa, infra medium 2^1-2 dem. 

 lata, rachi straminea et glabra, faciebus glabra, eglandulosa, marginibus setis paucis, 

 deciduis sparse ciliata, membranacea, obscure viridi, bipinnatifida vel subbipinnata. 

 Pinnis c. 25 jugis, fere oppositis, horizontaliter patentibus, remotis (4 cm.), lineari- 

 lanceolatis, latere posteriore producto inaequilateralibus, maximis 12 cm. longis, 

 medio 3 cm. latis, utrinque attenuatis, basi aërophoro ovali instructa sessilibus, 

 breviter acuminatis, pinnatifidis vel versus basin fere pinnatis, inferioribus 4 jugis 

 abrupte reductis (Typus IV), minimis. Laciniis 12 — 14 jugis, recte patentibus, ala 

 angusta vel subnulla connectis, late-linearibus, obtusis vel subacutis, integris vel 

 saepe irregulariter répandis, posterioribus productis '/:■■ quam anterioribus majoribus, 

 basalibus minoribus, rachin tegentibus. Venis furcatis vel (superioribus) indivisis, 

 12 — 14 jugis, distinctis, imis 1 mm. supra sinum marginem attingentibus. Soris 

 parvis, supramedialibus; indusiis reniformibus, glabris(?), cito evanescentibus. 



Our specimen agrees very well with the short description given by Christ, 

 onlj' he describes the veins as simple and the indusium as "gris-clair, chiffonné", 

 and he says that the base of the stem is "munie de grandes écailles brun opaque". 

 Further he calls it a near ally of D. limbata, from which it inter alia differs by 

 the position of its sori. 



63. Dryopteris siambonensis (Hier.) C. Chr. Index 292. 1905 — [Fig. 41]. 



Syn. Aspidiam siambonense Hieron. Engl. Jahrb. 22: 372. 1896. 

 Type from Argentina: Schlucht bei Siambon, leg. P. Lorentz & G. Hierony- 

 mus n. 795 (HB !). Also from Tucuman, P. Lorentz n. 916 (HB). 



64. Dryopteris achalensis (Hier.) C. Chr. Index 250. 1905. 



Syn. Aspidiam achalense Hieron. Engl. Jahrb. 22: 371. 1896. 



Type from Argen tin a: Sierra Achala, leg. G. Hieronymus n. 636. 808 (HBI). 



I place these two species in the group of D. Sprengelii because of their size 

 and large number of veins, in D. siambonensis 12 — 14, in D. achalensis 14 — 16, but 

 they differ from the other species of that group by their horizontally creeping 

 rhizome and lack of an aërophore. D. siambonensis may be distinguished from the 

 more firm, nearly papyraceous D. achalensis by its very thin slack lamina. 



