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GLOSSARY OF BOTANICAL TERMS 



Impressed. Deeply nerved; furrowed or grooved as if 

 by pressure. 



Inarching. The grafting together of two plants with the 

 intention that, when they are severed, part of one 

 plant will be growing on the other. 



Incanescent. Hoary- or gray-pubescent; canescent. 



Incised. Cut; slashed irregularly, more or less deeply 

 and sharply. 



Inclining. Looking or falling down from the horizontal. 



Included. Not protruded, as stamens not projecting from 

 the corolla. 



Incomplete. Lacking some of its parts, as a flower defi- 

 cient in stamens or calyx. 



Incrustate. Crusted ; with a hard or firm covering. 



Incumbent (cotyledons). Of a seed so bent over that the 

 back of one cotyledon lies against the radicle. 



Indefinite. Very numerous, as above twenty; see Definite. 



Indehiscent. Not regularly opening, as a seed-pod or anther. 



Indeterminate. Growing on from the apex, particularly of 

 the main axis. 



Indigenous. Native to the legion; not introduced from 

 some other country. 



Indumentum. A covering of hair. 



Induplicate. With margins folded inward. 



Indurated. Hard, hardened. 



Indusium. The little growth covering or surrounding the 

 sorus or fruit-dot in ferns. 



Inferior. Beneath, lower, below; as an inferior ovary, one 

 that is below the calyx-leaves. 



Inflated. Blown up; bladdery. 



Inflorescence. Mode of flower-bearing; technically less 

 correct but much more common in the sense of a flower- 

 cluster. 



Infra- In combinations, signifying below. 



Infundibuliform. Funnelform. 



Innate. Said of an anther when attached by its base to 

 the filament. 



Innovation. An offshoot or departure from the axis. 



Inserted. Attached ; as a stamen growing on the corolla. 



Inter-. In composition, signifying between, particularly 

 between closely related parts or organs. 



Inter foliaceous. Between the leaves, particularly between 

 two leaves of a pair. 



Internode. The part or space of stem between two nodes 

 or joints. 



Interrupted. Not continuous; in particular, the inter- 

 position of small leaflets or segments between others. 



Intorted. Twisted upon or around itself. 



Intramarginal. Just within the margin or edge ; between the 

 margins. 



Introduced. Brought from another region, either inten- 

 tionally or otherwise; in horticulture, used to desig- 

 nate the intentional bringing of plants into cultiva- 

 tion either from another country or from the wild. 



Introrse. Turned or faced inward or toward the axis, as 

 an anther looking toward the center of the flower. 



Inverted. Turned over; end-for-end; top-side down. 



Involucel. A secondary involucre; small involucre about 

 the parts of a cluster. 



Involucre. A whorl of small leaves or bracts standing close 

 underneath a flower or flower-cluster. 



Involute. Said of a flat body (as a leaf) rolled inward or 

 toward the upper side. See Revolute. 



Irregular flower. Some parts different from other parts 

 in same series. 



Jointed. With nodes, or points of real or apparent articu- 

 lation. 



Keeled. Ridged like the bottom of a boat; also the two 

 front united petals of a papilionaceous flower. 



Knaur. An excrescence, bur or knot of woody tissue that 

 will grow when removed and used as a cutting. 



Labellum. Lip, particularly the lip of orchids. 

 Labiate. Lipped ; a member of the Labiate. 



Labyrinthiform. With intricate winding lines or passages. 



Lacerate. Torn; irreguarly cleft or cut. 



Laciniate. Slashed into narrow pointed lobes. 



Lactescent. Containing milk or a milk-like substance. 



Lacunose. Having holes or empty places, particularly in 

 the anatomical structure. 



Lamella. A thin flat plate or part. 



Lamina. The blade of a leaf or petal or other expanded 

 part or body. 



Lanceolate. Lance-shaped; much longer than broad; 

 widening above the base and tapering to the apex. 



Lapidose. Found in stony places. 



Lateral. On or at the side. 



Layer. A branch that takes root and gives rise to an inde- 

 pendent plant. 



Leaflet. One part of a compound leaf; secondary leaf. 



Leaf-stalk. The stem of a leaf; petiole; foot-stalk. 



Legume. Simple pericarp dehiscing on both sutures; pod. 



Lemma. In grasses, the flowering glume, the lower of 

 the two bracts immediately inclosing the flower. 



Lenticular. Lentil-shaped; lens-shaped. 



Lepals. Sterile stamens, particularly those nectaries or 

 scales representing stamens; term little used. 



Lepidote. Surfaced with small scurfy scales. 



Liana, liane. A woody twining or climbing plant entang- 

 ling a tropical forest. 



Life-history. The sum of the events in the life of a plant. 



Ligneous. Woody. 



Ligule. A strap-shaped organ or body; particularly, a 

 strap-shaped corolla, as in the ray-flowers of com- 

 posites; also a projection from the top of the sheath in 

 grasses and similar plants. 



Limb. The expanded flat part of an organ; in particular, 

 the expanding part of a gamopetalous corolla. 



Limbale. Surrounded by an edging of another color; 

 margined with color; also, provided with a limb. 



Line. One-twelfth of an inch. 



Linear. Long and narrow, the sides parallel or nearly so. 



Lineate. Lined; bearing thin parallel lines. 



Linguiform. Shaped like a lingula, or with a projecting 

 tongue-like part or process. 



Lip. One of the parts in an unequally divided corolla or 

 calyx; these parts are usually two, the upper lip and 

 the lower lip, although one lip is sometimes wanting; 

 the upper lip of orchids is by a twist of the stipe 

 made to appear as the lower; a labium. 



Lobe. Any part or segment of an organ; specifically a part 

 of petal or calyx or leaf that represents a division to 

 about the middle. 



Lobule. A small lobe.- 



Locule. Compartment or cell of a pistil or anther. 



Loculicidal. Dehiscence between the partitions into the 

 cavity. 



Lodicule. A small scale in a grass flower, between the 

 lemma and stamens. 



Lament. A legume with constrictions or articulations. 



Lorate. Strap-shaped. 



Lyrate. Pinnatifid but with an enlarged terminal lobe and 

 smaller lower lobes. 



Medullary. Relating to the pith; the medullary rays seen 



in cross-sections of woody trunks radiate from the 



medulla or pith. 

 Meniscoidal. Like a meniscus or disk; with the form of a 



watch-crystal. 



Mericarp. The peculiar seed-like fruit of the Umbelliferae. 

 -merous. In composition, referring to the numbers of 



parts; as flowers 5-merous, in which the parts of each 



kind or series are five or in fives. 

 Mesocarp. Middle layer or part of a pericarp; the part 



between the endocarp and exocarp. 

 Mesochil. The intermediate or middle part of the lip of 



orchids when the lip is separated into three parts. 

 Micropyle. The opening through which impregnation 



takes place; the point on the seed marking the orifice 



of the ovule. 



