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Ginkgo also known as the Maidenhair Tree after Adiantum, is a unique species of tree with no close living relatives. The ginkgo is classified in its own division, the Ginkgophyta, comprising the single class Ginkgoopsida, order Ginkgoales, family Ginkgoaceae, genus Ginkgo and is the only extant species within this group. It is one of the best-known examples of a living fossil, because Ginkgoales other than G. biloba are not known from the fossil record after the Pliocene.

Ginkgo

Ginkgo also known as the Maidenhair Tree after Adiantum, is a unique species of tree with no close living…

"Gingko biloba, or Salisburia adiantifolia. a, branchlet with male flowers." -Whitney, 1911

Ginkgo Biloba Branchlet

"Gingko biloba, or Salisburia adiantifolia. a, branchlet with male flowers." -Whitney, 1911

"Gingko biloba, or Salisburia adiantifolia. b, branchlet with female flowers." -Whitney, 1911

Ginkgo Biloba Branchlet

"Gingko biloba, or Salisburia adiantifolia. b, branchlet with female flowers." -Whitney, 1911

"Gingko biloba, or Salisburia adiantifolia. c, naked seed, immature." -Whitney, 1911

Immature Ginkgo Seed

"Gingko biloba, or Salisburia adiantifolia. c, naked seed, immature." -Whitney, 1911

"Gingko biloba, or Salisburia adiantifolia. d, naked seed, mature." -Whitney, 1911

Mature Ginkgo Seed

"Gingko biloba, or Salisburia adiantifolia. d, naked seed, mature." -Whitney, 1911

"Gingko biloba, or Salisburia adiantifolia. e, naked seed, mature, deprived of the outer fleshy testa." -Whitney, 1911

Mature Ginkgo Seed

"Gingko biloba, or Salisburia adiantifolia. e, naked seed, mature, deprived of the outer fleshy testa."…