Hyemal, see [hiemal].
Hymenium of a Mushroom, [172].
Hypanthium, a hollow flower-receptacle, such as that of Rose.
Hypo-, Greek prefix for under, or underneath.
Hypocotyle, or Hypocotyl, part of stem below the cotyledons, [11].
Hypocrateriform, properly Hypocraterimorphous, salver-shaped.
Hypogæan, or Hypogæous, produced under ground, [19].
Hypogynous, inserted under the pistil, [95], [99].
Hysteranthous, with the blossoms developed earlier than the leaves.
Icosandrous, having 20 (or 12 or more) stamens inserted on the calyx.