Dryopteridaceae

Kessler, Michael, Moran, Robbin C., Mickel, John T., Matos, Fernando B. & Smith, Alan R., 2018, Prodromus of a fern flora for Bolivia. XXXV. Dryopteridaceae, Phytotaxa 353 (1), pp. 448-450 : 448-450

Key to the Bolivian genera of Dryopteridaceae

1 Sporangia acrostichoid, uniformly distributed over the surface of the fertile segments; fertile and sterile leaves often dissimilar in size and/or dissection ........................................................................................................................................................................ 2

– Sporangia in discrete, ± round sori that are centered on or along the veins; fertile and sterile leaves usually similar in size and dissection .......................................................................................................................................................................................... 8

2 Sterile blades simple, pedately divided, or if 1-pinnate then <10(–17) cm long .............................................................................. 3

– Sterile blades 1-pinnate or more divided,> 25 cm long .................................................................................................................... 4

3 Veins areolate ......................................................................................................................................................................... Bolbitis

– Veins free, ± perpendicular to blade margins, simple or forked, rarely or sporadically anastomosing .................... Elaphoglossum

4 Sterile blades 1-pinnate-pinnatifid or more divided ............................................................................. Polybotrya subg. Polybotrya

– Sterile blades 1-pinnate .................................................................................................................................................................... 5

5 Sterile blades with anastomosing veins ............................................................................................................................................ 6

– Sterile blades with free veins or with parallel veins joined by a submarginal connecting vein ....................................................... 7

6 Plants mostly terrestrial; leaf buds present near pinna apices; leaf apices usually pinnatifid and tapering .......................... Bolbitis

– Plants usually hemiepiphytic; leaf buds lacking or produced at the pinna bases; leaf apices usually conform or subconfrom ......... .............................................................................................................................................................................................. Mickelia

7 Sterile pinnae with parallel veins joined by a submarginal connecting vein; distal pinnae conform; each meristele not surrounded by a dark sclerenchymatous sheath ...................................................................................................................................... Olfersia

– Sterile pinnae with free veins not joined on the margins; distal pinnae reduced; each meristele surrounded by a dark sclerenchymatous sheath ................................................................................................................................................... Polybotrya subg. Soromanes

8 Veins anastomosing .......................................................................................................................................................... Cyclodium

– Veins free .......................................................................................................................................................................................... 9

9 Midribs of penultimate segments adaxially flat or commonly grooved, or with slightly raised edges .......................................... 10

– Midribs of penultimate segments adaxially raised ......................................................................................................................... 14

10 Blades 1-pinnate; sori indusiate ........................................................................................................................................ Cyclodium

– Blades 1-pinnate-pinnatifid or more divided, if 1-pinnate then with exindusiate sori ................................................................... 11

11 Sori exindusiate or (in two species of Polystichum ) with peltate indusia ...................................................................................... 12

– Sori with round-reniform indusia ................................................................................................................................................... 13

12 Vein endings not thickened, ending close to the segment margins; blades lacking pellucid-punctate glands in laminar tissue; segment margins spinulose ............................................................................................................................................ Polystichum