Vegetative key to the families

Vegetative Key Vegetative key to the families

GRASSES. Herbs. Leaf bases modified to form an open sheath which encloses the stem; leaf blade with parallel venation and abruptly distinct from the sheath; LIGULE usually present at the top of the sheath (Fig 24) Poaceae

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Spikelets bisexual (rarely unisexual, and if so, the spikelets similar and in the same inflorescence)

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Spikelets not as in Group 13

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Inflorescence a solitary spike or raceme (Fig. 47)

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Spikelets sunken in the rhachis and scarcely protruding beyond the contour of the rhachis until they open

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Spikelets not sunken in the rhachis, although the bases alone may be slightly sunken