double 



Duces 



with the egg nucleus, the other with 

 the upper polar nucleus, and this 

 last with the lower polar nucleus ; 

 also termed Triple Fusion ; '-- 

 Fructifica'tion, dimorphism in fruit, 

 applied to certain Algae ; ~ Nee'dle, 

 in Sciadopitys, a dwarf branch with- 

 out bud scales, the two leaves being 

 fused together at the edges into one 

 needle ; '-- Eecip'rocal Cross, the off- 

 spring of two reciprocal crosses, 

 as {b X m) X {m X b) resulting in 

 the usual suppressing of the charac- 

 ters of the middle parent, m : ~ 

 Rosette", = Dyaster ; Doub'ling, 

 the same as Chorisis ; doubly, some- 

 thing repeated, as ~ toothed, the 

 teeth themselves being toothed. 

 Down (1) soft pubescence; (2) the 

 pappus of such plants as thistles ; 

 down'y, pubescent, with fine soft 

 hairs. 

 Dra'canth {draganthum, Mid. Lat.), a 



synonym of Gum Tragacanth. 

 Draco'nine, a red resinous substance 

 from "Dragon's Blood," produced 

 by Baemonorops Drado, Blume, and 

 Dracaena Draco, Linn. 

 Draining-point, of a leaf; cf. Drip- 

 point. 

 drawn, applied to attenuated shoots^ 

 diminished and etiolated, often 

 increased in length. 

 drep'aniform {Speiravov), a sickle ; 

 /•*rma, shape), falcate (Crozier) ; 

 Drepa'nium, a sickle-shaped cyme ; 

 drepanoclad'ous («A<£5oy, a branch), 

 having sickle-shaped branches 

 (Russow), 

 Dri'mad {5pi/xvs, pungent, -f- ad), a 

 plant of an alkaline formation ; 

 Drimi'um, an alkali plain or salt 

 basin formation ; drimyph'ilus 

 {<pi\4a}, I love), salt-loving, halo- 

 philous ; Drimyphy'ta {(pvrhv, a 

 plant), salt-plants (Clements). 

 Dri'odad {Splos, a thicket, + ad), a 

 plant of a dry tliicket ; Driodi'um, 

 a dry thicket formation (Clements). 

 Drip-point Drip-tip, the acuminate 

 apex of a leaf, from whose point 

 water soon drips ; Germ. Triiufel- 

 spitze. 



11 



Dromofropism {Sp6fjLos, a course ; 

 rpoTT^, a turning), the irritability 

 of climbing plants which results 

 in their spiral growth (Macilillan) ; 

 adj. dromotrop'ic. 

 droop'ing, inclining downwards, cer- 



nuous, but not quite pendent. 

 Drop-dis'ease, a disease of lettuce 

 ascribed to Botrytis vulgaris and 

 Sclerotinia Liberliana. 



Drop'per, the young bulb of a tulip, 

 not of flowering size. 



Drop'ping-point = Drip-point. 



Drought (pr. drowt), want of rain 

 hindering plant-growth ; physical 

 '~, when the soil contains very little 

 free water ; physiological -- , v/hen 

 the soil contains a considerable 

 amount of water, which, by reason 

 of the character of the soil or weak 

 osmotic for<;e of the roots, cannot be 

 used by the plant (Warming). 



drupa'ceoua(c?/-w;ja,an olive, -fACEOirs), 

 resembling a Drupe, possessing its 

 character, or producing similar 

 fruit ; Drupe^ Dru'pa, a stone-fruit 

 such as a plum ; the pericarp fleshy 

 or leathery, containing a stout with 

 a kernel ; false '~ , a nut-like fruit 

 where the lower persistent part of 

 the perianth becomes fleshy, as in 

 Ncea ; spu'rious '~ , any fleshy body 

 enclosing a stone ; Dru'pel, Dru'- 

 pelet, Dricpe'ola, a diminutive drupe, 

 the fruit of the Blackberry is an 

 aggregation of these ; Drupe'tum, a 

 cluster of drupes ; Dru'pose, a con- 

 stituent of the btone-cells of the 

 flesh of pears (Cross and Be van). 



dru'sy, a mineralogical term used by 

 G. E. Smith to express the appear- 

 ance of the stigma of Orobanche 

 caryophyllea ; pruinose. 



Dry 'ads, pi. (5puos, a wood-nymph), 

 applied to shade-plants. 



Dry-rot, destruction of timber in houses 

 by Merulius lacrymans, Fr. 



du'bious, du'bius (Lat. ), doubtful, used 

 for plants whose structure or affinities 

 are uncertain. 



Du'ces, pi. {dux, duds, a leader), 

 Lorentz's name for character cells in 

 Mosses ; = Deuter Cells. 



