r the surface of the ground.

_Humilis_, low in stature.

_Hyaline_, transparent, or partly so.

_Hybrid_, a cross-breed between two allied species, 176.

_Hydrophytes_, water-plants.

_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.

_Hypogaean_, or _Hypogaeous_, 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.

_Imberbis_, Latin for beardless.

_Imbricate_, _Imbricated_, _Imbricative_, overlapping one another, like
tiles or shingles on a roof, as the bud-scales of Horse-chestnut and
Hickory, 27. In aestivation, where some leaves of the calyx or corolla
are overlapped on both sides by others, 98.

_Immarginate_, destitute of a rim or border.

_Immersed_, growing wholly under water.

_Impari-pinnate_, pinnate with a single leaflet at the apex, 57.

_Imperfect flowers_, wanting either stamens or pistils, 85.

_Inaequilateral_, unequal-sided, as the leaf of a Begonia.

_Inane_, empty, said of an anther which produces no pollen, &c.

_Inappendiculate_, not appendaged.

_Incanous_, _Incanescent_, hoary with soft white pubescence.

_Incarnate_, flesh-colored.

_Incised_, cut rather deeply and irregularly, 58.

_Included_, enclosed; when the part in question does not project beyond
another.

_Incomplete Flower_, wanting calyx or corolla, 86.

_Incrassated_, thickened.

_Incubous_, with tip of one leaf lying flat over the base of the next
above.

_Incumbent_, leaning or resting upon; the cotyledons are incumbent when
the back of one of them lies against the radicle, 128; the anthers are
incumbent when turned or looking inwards.

_Incurved_, gradually curving inwards.

_Indefinite_, not uniform in number, or too numerous to mention (over
12).

_Indefinite_ or _Indeterminate Inflorescence_, 72.

_Indehiscent_, not splitting open; i. e. not dehiscent, 119.

_Indigenous_, native to the country.

_Individuals_, 175.

_Indumentum_, any hairy coating or pubescence.

_Induplicate_, with the edges turned inwards, 97.

_Induviate_, clothed with old and withered p