Imbricate. Overlapping, like the shingles on a roof. 



Indehiscent. Not opening by valves or slits; remaining persist- 

 ently closed. 



Indigenous. Native and original to a region. 



Inflorescence. The flowering part of a plant, and especially its 

 arrangement. 



Internode. The portion of a stem between two nodes. 



Involucral. Pertaining to an involucre. 



Involucre. A circle of bracts surrounding a flower or cluster 

 of flowers. 



Keeled. With a central ridge like the keel of a boat. 



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 xii. 

 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 xvi. 

 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 xn. 



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

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

 Lustrous. Glossy; shining. 



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 xii. 

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