Head. A dense cluster of flowers, about as broad as long. 



Hirsute. With stiff coarse hairs. 



Imperfect. Flowers which contain either pistil or stamens, not both. 



Incised. With deep, sharp, irregular, divisions. 



Indehiscent. Not breaking open at maturity to discharge the contents. 



Inflorescence. A cluster of flowers. 



Internode. A section of stem between two joints, or nodes. 



Involucre. A collection of bracts at the base of a flower-cluster. 



Irregular. Possessing similar parts of different size or form. An 



irregular flower is generally distinguished by petals of unequal 



size or shape. 



Laciniate. Cut into narrow pointed lobes or divisions. 

 Lanceolate. Shaped like a lance-head, several times longer than wide, 



and broadest below the middle. 



Linear. Long and narrow, but with about uniform width. 

 Linear-lanceolate. Intermediate in shape between linear and 



lanceolate; narrowly lanceolate. 

 Lip. The largest and most conspicuous petal in an irregular corolla, 



usually applied to the lower petal of an orchid. 

 Lobe. A segment or division of any organ. 

 Leaflet. One portion of the blade of a compound leaf. 

 Lemma. One of the bracts jn the spikelet of a grass, and described in 



the treatment of that family. 

 Membranous. Thin or membrane-like in texture. 

 Monoecious. Bearing stamens and pistils in separate flowers, but on 



the same plant. ' 



Mucronate. Tipped with a short small abrupt tip. 



]Node. A joint of a stem, at which leaves are borne and branches ap- 

 pear. 



Oblanceolate. Reversed lanceolate in shape. 

 Oblique. With unequal sides. 



Oblong 1 . Somewhat rectangular in shape, with parallel sides. 

 Oblong-lanceolate. Intermediate in shape between oblong and 



lanceolate. 



Oblong- spatulate. Intermediate in shape between oblong and spatulate. 

 Oboyate. Reversed ovate in shape. 

 Obtuse. Blunt-tipped; terminating in an obtuse angle. 

 Odd-pinnate. A compound leaf terminating in a single leaflet. 

 Once-compound. A compound leaf bearing leaflets at the end or along 



the sides of the main axis. 

 Once-pinnate. A compound leaf bearing leaflets along the sides of 



the axis. 



Open sheath. A leaf-sheath with separate margins. 

 Opposite. Situated in pairs on opposite sides of the stem or axis. 

 Ovary. The basal, usually swollen portion of the pistil, within which 



the seeds are produced. 

 Ovate. Egg-shape in outline. 



