362 American Midland Naturalist Monograph No. 7 



Linear. Long and narrow with nearly parallel margins. 



Lip. Either of the divisions of a bilabiate corolla; the peculiar upper (ap- 

 parently lower) petal in orchids. 



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

 or leaf that represents a division to about the middle. 



LoBULATE. With small shallow lobes. 



Local. Species of restricted or infrequent occurrence, but the number of 

 individuals may vary from one to many. 



LocuLE. One of the cavities or compartments of a pistil or anther. 



LoMENT. A jointed legume, usually constricted between the seeds, and at 

 maturity breaking transversely into 1 -seeded, indehiscent segments. 



Lunate. Crescent- or half-moon-shaped. 



Lyrate. Lyre-shaped; descriptive of a pinnatifid leaf having a large, rounded 

 terminal lobe, and the lateral lobes becoming gradually smaller toward 

 the base. 



Megaspore. The larger of two kinds of spores of a plant, usually giving 



rise to a female gametophyte. 

 Membranous. Thin, soft, pliable, sometimes more or less translucent. 

 Microspore. The smaller of two kinds of spores of a plant, usually giving 



rise to a male gametophyte. 

 Microsporophyll. a sporophyll that bears microspores. 

 Monadelphous. Said of stamens when the filaments are united into one 



tube. 

 Moniliform. Resembling a string of beads, as the rhizome of certain species 



of Scutellaria. 

 Monoecious. Having stamens and pistils in separate flowers on the same 



plant. 

 MucRONATE. Tipped with a short abrupt point or mucro. 

 Mucronulate. Minutely mucronate. 



Multiple fruit. A cluster of matured ovaries produced by separate flowers. 

 MuRiCATE. Roughened with short hard points. 



Naturalized (nat.). Although not native in the region, growing spontaneous- 

 ly and well established as a component of the flora. 



Neuter. Devoid of stamens and functional pistil. 



Nodose. Provided with knots or internal transverse partitions, as the leaves 

 of some species of Juncus, and Eleocharis. 



Node. The joint of a stem where the leaves are inserted. 



Nut. An indehiscent, dry, one-seeded, hard-walled fruit, produced from a 

 compound ovary. 



Nutlet. A little nut; one of the achene-like parts of the fruit of Bora- 

 ginaceae, Verbenaceae, Labiatae, etc. 



Ob — . A Latin prefix, usually signifying inversion, as obcordate (inversely 

 heart-shaped), oblanceolate (inversely lanceolate), obovate (inversely 

 ovate) , etc. 



Obtuse. Blunt, rounded. 



Opposite. Inserted on opposite sides of an axis, as leaxes, when there are 

 two at one node. 



Orbicular. Circular; round in outline. 



