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Key to Goniopteris

Thelypteridaceae

Goniopteris

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1 Pinnae in 6-8 (-12) pairs, these decreasing only slightly if at all to the last pair, which abruptly narrows to the leaf tip; leaves (including the petiole) to 11 dm long, 15-25 cm wide, not rooting at the tip
1 Pinnae in 1-25 (-30) pairs, these gradually decreasing in size towards the leaf apex; leaves (including the petiole) 1-5.5 dm long, 2-8 (-10) cm wide, sterile blades often rooting at the tip.
  2 Pinnae with acute lobes; blade hairs subsessile, stellate; blades erect, not rooting at apex; leaves with 18-25 pinna pairs
  2 Pinnae entire or with shallow, rounded lobes; blade hairs stalked, stellate, mixed with needlelike hairs; blades commonly arching or pendent and rooting at apex; leaves with 1-25 pinna pairs
    3 Mature leaf blades erect; leaf pinnatifid for > 3/4 of its length, pinnate in the basal > 1/4 of the blade length, with 1-4 free pairs of basal pinnae)
    3 Mature leaf blades spreading to ascending; leaf pinnatifid for > 1/2 of its length, pinnate in the basal > 1/2 of the blade length, with > 7 free pairs of basal pinnae