236 Bulletin 194 



Laciniate. Cut into narrow, pointed lobes. 



Lanceolate. Lance-shaped, broadest above the base and tapering to the apex, 



but several times longer than wide. Page 7. 

 Lateral. Situated on the side of a branch. 

 Leaf. The green expansions borne by the branches of a tree, consisting of a 



blade with or without a petiole. 

 Leaflet. One of the small blades of a compound leaf. 

 Leaf-scar. The scar left on a twig by the falling of a leaf. Page 10, c. 

 Legume. A pod-like fruit composed of a solitary carpel and usually splitting 



open by both sutures (Leguminosae). 

 Lenticels. Corky growths on young bark which admit air to the interior of 



a twig or branch. 

 Linear. Long and narrow, with parallel edges (as pine needles). Page 7. 

 Loam. A non-coherent mixture of sand, clay and organic matter. 

 Loamy. Of the nature of or like loam. 

 Lobe. Any division of an organ, especially if rounded, 

 Lobed. Provided with a lobe or lobes. Page 8. 

 Luster. Brilliancy or sheen; gloss. 

 Lustrous. Glossy; shining. 



Medullary rays. Plates of cellular tissue radiating from the pith to the 

 bark. They are primary when they extend from pith to bark and second- 

 ary when they are of less extent than the primary. Page 195, i. 



Membranaceous . Thin and somewhat translucent. 



Midrib. The central vein of a leaf or leaflet. 



Monoecious. Unisexual, with staminate and pistillate flowers on the same 

 individual. 



Mucilaginous. Slimy; resembling or secreting mucilage or gum. 



Mucronate. Tipped with a small, abrupt point. Page 7. 



Naked. Lacking organs or parts which are normally present in related 



species or genera. 

 Naturalized. Said of introduced plants which are reproducing by self-sown 



seeds. 

 Nectariferous. Producing nectar. 



Node. The place upon a stem which normally bears a leaf or whorl of leaves. 

 Non-porous. Said of wood whose structure is homogeneous, without large 



pores. 

 Nut. A hard and indehiscent, 1-celled, 1-seeded fruit. 

 Nutlet. A diminutive nut. 



Oblanceolate. Lanceolate, with the broadest part toward the apex. Page 7. 



Oblique. Slanting, or with unequal sides. 



Oblong. Longer than broad, with sides approximately parallel. Page 7. 



Obovate. Ovate, with the broadest part toward the apex. Page 7. 



Obovoid. An ovate solid with the broadest part toward the apex. 



Obtuse. Blunt or rounded at the apex. Page 7. 



Opaque. Dull ; neither shining nor translucent. 



Opposite. Said of leaves, branches, buds, etc., on opposite sides of a stem at 



a node. 

 Orbicular. Circular. Page 7. 

 Oval. Broadly elliptical. Page 7. 



Ovary. The part of a pistil that contains the ovules. Page 8. 

 Ovate. Egg-shaped, with the broad end basal. Page 7. 

 Ovoid. Solid ovate or solid oval. 

 Ovule. The part of a flower which after fertilization becomes the seed. 



Palmate. Radiately lobed or divided; hand-shaped. 



Panicle. A loose, irregularly compound inflorescence with pedicellate flowers. 



Page 9. 

 Paniculate. Arranged in panicles or resembling a panicle. 

 Papilionaceous. Butterfly-like, as in flowers of the Leguminosae. 

 Parenchyma. The soft, thin-walled, cellular tissue of plants. Page 195, 



IX, e. 

 Parenchyma elements. The cells or units composing the parenchyma. 

 Pedicel. The stalk of a single flower in a compound inflorescence. 



