4 ARKIV FÖR BOTANIK. BAND 14. N:0 19. 



inclusam brevem anastomosante, snperioribus liberis. — Folium 

 fertile ignotum. 



Madagascaria: Moramanga, 12. 10. 1912, nr. 453. 



Although sterile I do not hesitate to describe this fern 

 as new. In pubescence it agrees with other species of Cte- 

 nitis and it is certainly closely related to D. Poolii C. Chr. 

 (Nephrodium fibrillosum Bak.) and D. biformis (Boiv.) C. Chr., 

 differing from both by its basal pair of veins being united. 



Dryopteris gladiata C. Chr. sp. nov. 



PI. 1, Figs. 4, 8. 



Cyclosorus rhizomate ignoto. Stipite (incomplete 25 cm 

 longo), 1 cm crasso, superne late bisulcato, fusco-stramineo, 

 glabro, paleis adpressis parvis deciduis inconspicue instructo. 

 Lamina lanceolata, regulariter pinnata, membranacea, in spe- 

 cimine incompleta, verisimiliter usque ad 1 m longa, supra 

 ad rachin crassam et eostas pulveraceo-glandulosa, subtus ad 

 costas squamis brunneis angustis sparse vestita, pilis simpli- 

 cibus destituta. Pinnis numerosis, omnibus oppositis, 3 cm 

 inter se distantibus, sessilibus, paulo ascendentibus, linearibus, 

 acuminatis, 15 cm longis 2 cm latis, marginibus regulariter 

 profunde crenulatis, inferioribus paulo abbreviatis et reflexis, 

 infimis paribus valde reductis. Crenis vel lobis 3 mm latis 

 2 mm longis fere semicircularibus, apice pinnarum acuminato 

 subintegro. Venis secundariis alternis, 6 mm remotis, tertia- 

 riis simplicibus 6-jugis, 4 — 5 inferioribus cum oppositis in 

 venam ad sinum inter crenarum excurrentem anastomosan- 

 tibus. Soris exindusiatis, inferioribus in venis tertiariis sub- 

 apicalibus. superioribus medialibua. Sporangiis laxe coacer- 

 vatis, glabris. 



Madagascaria: Moramanga, in silvis prirasevis, 1. 10. 

 1912, nr. 354. 



A member of the group of D. 'pennigera (Forst.), well 

 distinguished by its very regular cutting and sword-shaped, 

 opposite pinnae, which are deeply and regularly crenate only, 

 not pinnatifid. Below the single pair of reduced pinnae I find 

 on the upper part of the stipe blackish spots, which indicate 

 the place of abortive pinnae. The apex of the leaf is wanting. 



