160 Bulletin of the University of Texas 



Dehiscent. Splitting open as in pods. 



Deltoid. Triangular. Delta-like. 



Dentate. Toothed. 



Dioecious. Bearing stamens and pistils on different plants. 



Drupe. A fleshy fruit with one stone as the plum. 



Druplet. A small drupe. 



Elliptical. Oval or oblong with rounded ends. 



Elongated. Long drawn out. 



Entire. Without teeth, notches or lobes. 



Epidermis. The outer skin or layer of plants. 



Equally pinnate. Without an odd leaflet at the end of the leaf. 



Exudation. Sap, resin or milk that oozes from a cut surface. 



Fasicle. A close cluster of leaves or flowers. 



Fasicled. Arranged in fasicles. 



Feather-veined. With veins extending from the sides of the midrib. 



Fertilization. The union of a male cell, derived from the pollen, with 

 a female cell in the ovule. 



Filament. The stalk which bears the anther. 



Flower. An axis which bears stamens or pistils or both, with or with- 

 out petals and sepals. 



Fruit. A ripened ovary with or without accessory parts. 



Genus. A group of species which are more like each other than like 

 any other group. 



Glabrous. Smooth. 



Glaucous. With a bloom, a bluish or whitish waxy layer. 



Globose. Ball-like or nearly so. 



Globular. Ball-like. 



Head. A dense cluster of sessile flowers. 



Heartwood. The mature and dead wood of a stem usually darkly 

 colored. 



Hybrid. A cross between two different species or varieties of plants. 



Imbricated. Overlapping like shingles. 



Incised. . Cut* 



Indehiscent. Not splitting open. 



Inflorescence. A flower cluster. 



Involucre. The bracts which surround a flower cluster. 



Irregular. Used to denote flowers in which the petals are unlike. 



Keeled. Ridged like the keel of a boat. 



Lanceolate. Shaped like a lance. 



Leaflet. One of the ultimate divisions of a compound leaf. 



Lenticel. Lenticular corky growths on the young bark. 



Linear. A leaf several times as long as wide, with sides parallel or 

 nearly so. 



Lobe. A division of a simple organ as a leaf. 



Lustrous. Shining. 



Medullary rays. Rays extending from pith to bark. 



Membranous. Papery, membrane-like. 



Mid-rib. The main central rib of the leaf. 



