Dictionary

Word	Meaning
Hastula	A flat often triangular expansion at the upper surface of the petiole of a palm leaf where it joins the blade.
Herb	A general term including all non-woody plants.
Herbaceous	A plant comprised primarily of soft, green tissue.
Herkogamy	Separation in space between stigma(s) and anthers.
Hermaphrodite	A synonym of bisexual. A flower that has both male, pollen-producing parts (staminate) and female, ovule-producing parts (carpellate).
herringbone	Leaf side veins prominent, closely spaced, straight and parallel.
Heterostylic	Differing stamen and pistil lengths in the same species to prevent self-pollination.
Heterostylous	Having differing stamen and pistil lengths in the same species to prevent self-pollination.
Hilar	Scars on seeds where they were attached to the stalk, or where they separated from its funicle or placenta.
Hilum	The scar on a seed where it was attached to the stalk, or where it separated from its funicle or placenta.
Hirsute	With hairs that are somewhat course and stiff.
Hirtellous	Slightly hirsute.
Hispid	Covered with stiff hairs or bristles.
Hispidulous	Having a covering of stiff hairs or bristles.
Hormone	Organic substances in very low concentrations that the plant transports to sites where the hormones control growth, development processes and a range of other functions.
Hyaline	Almost transparent.
Hybrid	A plant that is the product of cross-breeding between two closely related species.
Hypanthium	A cuplike or tubular structure, around or atop the ovary, bearing along its margin the sepals, petals, and stamens.
Hyphodromous	With only a single main vein visible.
Hypogynous	The sepals, petals and stamens are inserted below the ovary.
Imbricate	Having adjacent edges overlapping. Compare with valvate.
Imparipinnate	Pinnate with a single terminal leaflet; see also paripinnate.
Indehiscent	Dry fruits that do not split open to release seeds.
Indeterminate	A growing pattern that allows for continuous growth in the same direction. For example, flowers at the base or outermost parts of the inflorescence open first, enabling continued new growth toward the apex.
Indumentum	A covering of fine hairs.
Inferior ovary	The ovary is situated below the calyx. See superior ovary.
Inflorescence	A flower-bearing shoot that bears multiple flowers.
Infundibuliform	Funnel-shaped, widening abruptly from a narrow cylindrical section.
Internode	The section of the stem between the nodes. Plants can vary the intermodal length in response to amounts of sun or shade. In deep shade, internodes are lengthened.
Interpetiolar stipules	Stipules situated between the two petioles of opposite leaves. This form is characteristic of stipules in many Rubiaceae species. See Intrapetiolar stipules.