Vegetative key to the families

Vegetative Key Vegetative key to the families

Submerged plants rooted in mud. Leaves submerged or floating on the surface or sometimes the leaf blades held erect above the water surface. Freshwater or marine (Amphibious plants are not included in this group)

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Either; leaves alternate on an elongated stem (sometimes opposite when subtending flowers); or, leaves tufted on a short stem or arising from a rhizome

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Leaves entire or with 1–2 lobes or minutely toothed

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Leaves linear, mostly ribbon-like, basal or cauline

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Leaves c. 4 cm long, tufted on a rhizome (Limosella) Scrophulariaceae

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Either; leaves more than 4 cm long, tufted on a rhizome; or, leaves c. 4 cm long and alternate on a free stem