570 vanished lives

502Paleozoic

Narrow leaves repeatedly forked at their tips on an extinct seed-plant relative.

503Paleozoic

Needle-like leaves crowded the shoots of an early conifer-like tree.

504Mesozoic

Leaves of different lengths on one shoot record an early stage of modern conifer architecture.

505Mesozoic

Entire strap-shaped leaves with dense side veins define a form genus rather than one secure lineage.

551Mesozoic

Thick leathery pinnules and lower-surface stomata helped this seed fern withstand seasonal dryness.

552Mesozoic

Huge, nearly undivided strap leaves opened from a stout cycad-like crown.

553Mesozoic

Tough pinnate leaves crowned cycad-like trunks around compact flower-like reproductive organs.