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PHARMACEUTICAL BOTANY 
Hy'drophyte. —A water-plant. 
Hydrot'ropism. —The response of a plant organ to the stimulus of moisture. 
Hygroscop'ic. —The property possessed by certain cells or substances of absorb¬ 
ing moisture with avidity. 
Hyme'nium. —A spore bearing membrane of a fungus. 
Hy'pha. —A filament of the mycelium of a fungus. 
Hypo.—A prefix of Greek origin meaning under. 
Hy'pocotyl.—That part of an embryo p’antlet below the cotyledon or coty¬ 
ledons. 
Hypocrater'iform. —Applied to a calyx or corolla when the tube is long and 
slender and abruptly expands into a flat limb. 
Hypoder'mis. —That portion of a plant organ directly beneath the epidermis. 
Hypoge'ous. —Beneath the surface of the soil. 
Hypothe'cium. —That portion of a thallus of a lichen directly beneath or around 
the apothecium. 
Hypog'ynous. —Applied to the insertion of various floral parts on the receptacle 
and beneath the pistil. 
Id'ioblast. —A cell which differs materially in form, size, character of cell wall, 
or contents from its neighbors in a tissue. 
Imbibi'tion. —The taking in of water by organic bodies in such a manner as to 
cause them to swell up. 
Im'bricate. —Overlapping like shingles. 
Immersed'. —Growing entirely under water. 
Imparipin'nate. —Applied to a pinnately compound leaf terminating with a single 
leaflet. 
Indefinite. —Applied to stamens and other organs of the flower, when too 
numerous to be conveniently counted. 
Indehis'cent. —Not splitting open in a definite manner when ripe. 
Indig'enous. —Native. 
Indu'sium. —An outgrowth of the lower epidermis of many ferns that covers 
the cluster of sporangia. 
Inequilat'eral. —Having unequal sides. 
Inflores'cence.'— The arrangement of the flowers on a plant. 
Infundib'uliform. —Funnel shaped. 
Innate'. —Applied to anthers that are attached by their base to the summit of 
the filament. 
Integ'ument. —A covering. 
Intercellular. —Between the cells. 
Interfacic'ular. —Applied to a cambium layer which extends from one fibro- 
vascular bundle to another in the stems of Dicotyledons and Gymnosperms. 
In'temode. —That portion of the stem between two nodes. 
Interrup'tedly-Pin'nate. —Applied to a pinnate leaf that has either smaller or 
larger leaflets between those of usual size. 
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