368 GLOSSARY. 



Coriaceous. Leathery in texture. 



Corolla. The inner series of the perianth, composed of petals which are usually 



coloured. 

 Corymb. An inflorescence in which the branches and pedicels, though starting from 



different points, attain the same level, forming a flat-topped panicle. 

 Costate. Eibbed. 



Cotyledon. The first leaf or first pair of leaves of the embryo. 

 Crenate. "With regular blunt rounded teeth. 

 Crenulate. With very small rounded teeth or crenatures. 

 Crustaceous. Hard and brittle in texture. 

 Cucullate. Hood-shaped. 

 Cuneate. Wedge-shaped. 

 Cujpular. Cup-shaped. 

 Cupule. A small cup. 

 Cuspidate. Applied to leaves that are tipped with a spine, or that have a short 



sharp point. 

 Cyme. A branched flower-cluster, especially if broad and flattish, in which the 



middle flowers open first. 



Deciduous. Falling or subject to fall in season, as petals and bracts after flowering, 



or leaves in autumn. 

 Decompound. A term applied to a leaf in which the primary petiole gives off a 



number of secondary petioles, each supporting a compound leaflet. 

 Decumbent. Spreading horizontally, or nearly so, at the base, then turning upwards 



and becoming erect. 

 Decurrent. Applied to a leaf when its edges are continued down the stem so as to 



form raised lines or narrow appendages, called wings. 

 Decussate. In pairs, alternately crossing at right angles. 

 Deflexed. Sharply turned or bent downwards. 

 Dehiscence. The opening of an anther or of a capsule to liberate pollen or seed — 



usually by means of valves, slits, or by splitting along regular lines. 

 Dehiscent. Opening by valves or along regular lines to liberate pollen or seed. 

 Dentate. Toothed ; having the margin only cut a little way in. 

 Denticulate. Finely dentate or toothed. 



Depauperated. Diminutive or imperfectly developed, as if starved. 

 Depressed. More or less flattened vertically, or at any rate at the top. 

 Diadelphous. Applied to stamens united by their filaments into two clusters ; or, as 



in certain Leguminosae, consisting of a cluster of nine and one free stamen. 

 Diandrous. Having two stamens. 

 Diaphanous. Transparent, or nearly so. 



Dichotcmious. Dividing repeatedly into two branches of equal thickness. 

 Dicotyledon. A plant having two cotyledons, or seed-leaves. 

 Didymous. Twin ; found m pairs. 

 Didynamous. Applied to stamens^ arranged in two pairs, one pair being shorter than 



the other. 

 Diffuse. Applied to stems spreading along the ground for the whole or the greater 



portion of their length, when they are at the same time rather loosely and very 



much branched. 

 Dimidiate. Applied to a normally double organ when one part of it is so much 



smaller than the other as to appear to be missing ; also, split into two on one 



side, as in the calyptra of some mosses. 

 Dimorphic. Occurring under two forms. 

 Dioecious. Having the male and female flowers on separate plants. 



