TECTARIA Group

1A tooth present in each sinus between lobes of lamina, the tooth not in the plane of the lamina.
1'No tooth present in sinuses between lobes of lamina.
2Vascular bundles in stipes numerous, not in a simple ring; veins more or less anastomosing.
2'Vascular bundles in stipes in a simple ring; veins free
3Veins anastomosing in a single series of costal and costular areoles.
3'Veins more copiously anastomosing
4Pinnae jointed to rachis
4'Pinnae not jointed to rachis.
5Fertile leaflets acrostichoid and very much contracted as compared with sterile ones.
5'Fertile leaflets not acrostichoid.
6Veins free; sterile frond much divided
6'Veins anastomosing.
7Fronds deltoid, the basal basiscopic lobe of basal pinnae largest.
7'Fronds otherwise, basal basiscopic lobes of basal pinnae not largest.
8Fronds small, trifoliate; apical leaflet largest, commonly 5 cm long.
8'Fronds larger and in most cases more divided.
9Sterile fronds simple to deeply pinnatifid, not truly pinnate.
9'Sterile fronds with at least one pair of free pinnae, usually several pairs
10Two vascular bundles in base of stipe, uniting upwards to form a single bundle; scales confined to swollen bases of stipes
10'More than two vascular bundles throughout length of stipe; scales not so confined.
11Veins free.
11'Veins anastomosing.
12Basal basiscopic vein of a vein-group springing from the costule.
12'Basal basiscopic vein of a vein-group springing directly from the costa.
13Indusia peltate
13'Indusia reniform or absent.
14Fronds usually much longer than wide; basiscopic margin of lamina-lobes not thickened.
14'Fronds usually about as long as wide; basiscopic margin of lamina-lobes thickened.
15Basal pinnae with basal basiscopic lobes longest
15'Basal pinnae with basal basiscopic lobes or pinnules shorter than middle ones.
16Sori large, indusiate, terminal on a free vein, the receptacle elongate, fertile fronds narrow.
16'Sori various, indusiate or not, on free or netted veins; if indusiate, the receptacle not elongate, or fertile fronds not contracted as compared with sterile.
17Basal pinnae deeply lobed, basal basiscopic lobe not largest; few free veins in areoles.
17'Basal pinnae lobed or not; if lobed, basal basiscopic lobe largest; many free veins in areoles.