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Phylum Anthophyta (or Magnoliophyta or Angiospermophyta) -- flowering plants Anthophyta is, by far, the most abundant, familiar, and economically important extant phylum of plants. Features of its reproduction include: specialized strobili called flowers, a covering of seed called a carpel (hence the term, "angiospermous"), a mature carpel technically called a fruit, and a curious cytological process called "double fertilization" which produces both a diploid zygote and a triploid tissue called endosperm. Almost all human food is directly or indirectly derived from flowering plants. Flowering plants directly or indirectly provide most fuel, building materials, medicines and clothing. Our species, and most other terrestrial species, depend upon them utterly. Genus Carya

Carya (pecan)

Carya leaves are once-compound with alternate attachment.

Carya (pecan) - once compound leaf

Carya (pecan) - This is one leaf (once compound) with seventeen leaflets.

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