Handbook to the Ferns of British India Ceylon and the Malay Peninsula

Fertile fronds contracted with revolute margins indusium hemispherical very fugacious or wanting veins free. 7 STRUTHIOPTERIS 20 Indusium thin subglobose open at the top and laciniate. S WOODSIA. Indusium medial on a vein tbick globose pedicellate bursting into two lips. 9 PERANEMA. 22 Indusium apical on a vein two-valved 10 CIBOTIUM. 24 Indusium apical [...] Et Indusium quite continuous sori linear continuous occupying a slender filiform receptacle in the axis of the indusium veins free. 28 PTERIS 104 As in Pteris but lowest veins meeting and forming an arch. 29 CAMPTERIA. 116 As in Pteris but veins all anastomosing without free included veinlets. 30 DORYOPTERIS. 120 As in Pteris but veins all anasomosing wi [...] Indusium membranaceous distinct from the margin of the frond parallel with and usually contiguous tthe midrib veins free. As in Blechnum only veins anastomosing. Indusium linear-oblong thick in single rows parallel with and near the midrib sori sunk in cavities. Indusium lunate thin in one or more rows parallel with and near the midrib sori not sunk TRIBE VIM—AS PLENIEz [...] 416 Fronds pinnate Lomaria-like veins all simple or sometimes arcuate at the base ; scandent ferns 82 STENOCHLZENA 421 Fronds pinnate not Lomaria.like veins all simple ; not scandent. 83 POLY110TRYA. 424 Similar to Elaphoglossum but with a connecting vein running round the margin. 84 ACONIOPTERB 427 Veins copiously anastomosing with free included veinlets. 85 G [...] Sea-coast fern. 36 ACROSTICHUM 440 Drynaria-like fronds pinme articulated but stipe adherent to caudex. 87 PHOTINOPTERIS 442 Fronds with stag's-horn-like divisions vernation articslate sori in large patches only on the fertile fronds. SS PLATYCERIUM 444 SUB-ORDER III.—OSMUNDACEIE.