30 



Dip'teeods, Dip'tbrus — Having _ two 

 membranous expansions termed wings. 

 DisoiFLO'RiE (2ncl Series of Polypetalae) — 

 Forus usually thickened or expanded 

 into a dislc, either free or adnate to the 

 ovary, or to the calyx, or to both, 

 rarely reduced to glands, or wanting. 

 Stamens as many, or twice as many, 

 as petals, or fewer. Ovary superior or 

 partially immersed in the disk, divided 

 into cells with axile placentas, or the 

 carpels distinct. (Stamens indefinite in 

 a very few exceptional species. Ovary 

 inferior or enclosed in the calyx-tube 

 in most Rhamnesa ; l-celled in some 

 Olaoinese. ) 

 Discoid', Discoi'dal— A round, some- 

 what thickened lamina, the margins of 

 which are also rounded. Also used to 

 designate a large spot of colour sur- 

 rounded by some other colour. (See 

 the seeds of Nux-vomica. ) 

 Disk or Disc— Certain fleshy expansions 

 between the stamens and pistil ; an 

 enlargement of the receptacle which 

 occur in some flowers. The usual 

 forms cup-like (cupular), or flat like a 

 quoit, or cushion-like (pulvinate). It 

 may be entire, toothed or lobed, or 

 divided into quite separate parts,_ 

 when these parts are often spoken of 

 as glands. 

 DissEO'TUS— Where the segments, as in 

 some leaves, are very numerous, and 

 deeply cut, as in Geranium disseotum, 

 DissBP'iMENTS — The partitions of an ovary 



or fruit. 

 Dissi'LiENS— Bursting asunder with elas- 

 ticity, as some seed-vessels, particu- 

 larly those of EuphorbiaceEe. 

 Dissim'ilak — Unlike, when similar organs 

 assume different forms in the same 

 individual, like the anther of Cassia. 

 Dis'TicHODS, Dis'tichus — Arranged in two 

 rows, on opposite sides of a common 

 axis. (See the leaves upon the branch- 

 lets of the Bald Cypress, Taxodium 

 distichum.) 

 Diurbt'io — Plants having the power of pro- 

 moting an increased discharge of urine, 

 as Dandelion, Parsley, &c. 

 Diue'nus — This term is given to flowers 



which endure but for one day. 

 DiVA'EiciTE — Spreading irregularly . in 



various directions. 

 Divbrg'ing, Diveegens— When similar 

 parts, approximating at their bases, 

 incline away from each other towairds 

 their extremities. 

 Diversifo'liu.s — Having leaves of two or 



more shapes. 

 Dodeca'gtnods — Provided with twelve 



styles or stigmas. 

 Dodecan'hrous — Provided with twelve 



stamens. 

 Dola'brifoem, Dolaera'tcs, Dolabri- 



KOR'mis — Axe- shaped . 

 Dor'sal— On the back. DoRSiiji— The 

 back. DoESiFBRUS — Where the fructi- 

 fication is borne upon the back, as in a 

 large number of ferns. 



Dropping of the Petals of Pblargonim 

 Flowers— To prevent this <i™§ 

 transit to exhibition, it is rfioommeuded 

 that a small drop of gum be placed at 

 thebase of each peta,l with a small brush, 

 after which, it the flowers are carefully 

 packed, they will most likely carry, 

 safely. 

 Drupa'cbous, Drlta'obus— Either having 

 the character of a drupe, or resembling 

 one in' outward appearance. 

 Drupe, Dru'pa— A fruit in which the 

 pericarp, when ripe, consists of two 

 distinct portions — an outer succulent 

 one called the Sarcocarp (covered like 

 the berry by a skin or epicarp), and an 

 inner dry endocarp called the Ruta- 

 men, which is either cartilaginous (of 

 the consistence of parchment) or hard 

 and woody. In the latter case it is 

 commonly called a stone, and the drupe 

 a stone fruit. When the putamen con- 

 sists of several distinct stones or nuts, 

 each enclosing a seed, they are called 

 pyrenes, or sometimes kernels. The 

 fruitof the coco-nut, Oocos nucifera, is a 

 drupe with a fibrous (when dry) exooarp. 

 In Pandanus the drupes are crowded 

 together and form a "cone-like head. 

 Duct, Duc'tds — A membranous tube, one 

 of those which constitute the vascular 

 texture ; with or without markings on 

 the surface, but not accompanied in a 

 spirally coiled fibre, as the Trachese. 

 Dul'ois — Sweet, agreeable, as the 



peduncles of Hovenia dulcis. 

 DuMBTo'strs — Having the character or 



appearance of a bush. 

 Du'PLBX — Double. Double flowers are in 

 most cases an accidental deformity or 

 monster in which the Ordinary number 

 of petals is multiplied by the conver- 

 sion of stamens, sepals, or even carpels 

 into petals, by the division of ordinary 

 petals, or simply by the addition of 

 supernumerary. 

 Ddra'men — The heart-wood or centre of 

 Exogenous trees, and the outer part of 

 the stem of Endogens. 

 DuEio'scuLUS — Somewhat hard, stiff, or 



rigid. 

 Dts'entert — A disease causing a discharge 

 of mucus and blood from the bowels. 

 In America cotton-seed tea is given as 

 a remedy. 

 Dysophyl'lus— Leaves foetid. Dysox'tlon 



— The wood having a bad smell. 

 Dyspep'sia — Difficulty of digestion. Paw- 

 paw juice is considered a remedy. 

 Dys'ury — A difficulty of voiding the urine. 



E, Ex, in compounds, denotes absence, 



as Eeracteate, Eqlandular, Exalbu- 



MINOUa. 

 Ebori'nus, Eburneus — White like ivory; 



white, tinged with yellow, and with a 



tendency to a wavy lustre. 

 Ebractka'tus— Without bracts. 

 Eoblas'tesis — The production of buds 



within flowers, or on inflorescences, in 



consequence of monstrous development 

 Echina'tus — Set with prickles, bristly. 



Applied to surfaces which are covered 



with bristles, or with straight prickles. 



