Biology · Ch 9 — Morphology of Flowering Plants
Fabaceae
Fabaceae
Fabaceae — represented here by the Pea plant. Plants of this family are trees, shrubs or herbs. Root: the root system shows root nodules. Habit: Pea is an erect climber. Leaf: pinnately compound, arranged in alternate phyllotaxy. Inflorescence: racemose, of the raceme type. Flower: bisexual and zygomorphic. Calyx: five fused sepals (gamosepalous), arranged in imbricate aestivation. Corolla: five free petals (polypetalous) with unequal sizes, arranged in vexillary aestivation — the largest petal is the vexillum (standard), two smaller free petals are the wings, and two fused, smallest petals form the keel. Androecium: ten stamens arranged in a diadelphous condition, described as (9)+1 — nine stamens with fused filaments and one free. Gynoecium: monocarpellary; the ovary is unilocular and superior, with many ovules on marginal placentation. *Fruit: …
What this figure shows. A Pea plant habit sketch alongside close-up drawings of its parts: a pinnately compound leaf ending in tendrils with a pair of large leafy stipules at its base, an opened-out flower showing the standard, wing and keel petals separated, and a longitudinal section of the flower showing the diadelphous stamen …