556 



BOTANY OF THE LIVING PLANT 



Currant (Ribes). 53 ; raceme of, 226 



(Fig. 173), 517 (Figs. 423, 424) ; 



analysis of, 544. 

 Curvembryeae, 492, 507. 

 Cuscuta (Dodder), parasitism of, 190 



(Figs. 142, 143). 

 Cuticle, a thin layer of corky nature 



covering exposed surfaces, 35, 66 



(Figs. 49-50), 85 ; of xerophytes, 



176, 177. 

 Cutleria, 387 ; gametes of, 382 



(Fig. 323), 462. 

 Cuttings, 215. r 

 Cyanophyceae, 456. 

 Cyathium, a condensed spicate in- 

 florescence contained in a cup-like 



involucre : of spurge, 515 (Fig. 

 421). 



Cycas, motile male gametes of, 324. 

 Cycle of Life, in seed-plants, 299 



(Fig. 244). 

 Cyclic arrangement of leaves where 



two or more are seated at the same 



level, 1 68 ; of parts of flower, 230 



(Fig. 178). 

 Cyclosporeae, 379. 

 Cydonia (Quince), flower of, 220 



(Fig. 1 68). 



Cynara, spread of in La Plata, 295. 

 Cynoglossum, hooked fruits of, 292 



(Fig. 238). 



Cyperaceae, 492, 502. 

 Cyperus, girder construction in, 148 



(Fig. 1 06), 149. 

 Cytase, the digestive ferment for 



cellulose, 112. 

 Cytisus adami, reputed graft-hybrid, 



218. 

 Cytoplasm, the protoplasmic body of 



the cell exclusive of the nucleus, 



17 ; of root-hair, 86. 



Daffodil, 495. 



Dahlia, 164 ; storage roots of, 165 



(Fig. 123) ; storage in, 109. 

 Daisy, capitulum of, 227 (Fig. 175). 

 Damping-off disease, 406, 413. 

 Dandelion, capitulum of, 227, 533 



(Figs. 444-445) ; clock, 539 (Fig. 



445)- 



Dasylirion, qualities of fibres of, 146. 

 Date, storage in, 109. 

 Datura, stigma of, 256 (Fig. 204). 

 Daucus Carota (Carrot), 541, 542. 

 Dead-Nettie (Lamium), 532 (Fig. 



438). 



Dead-weight, mechanical support of, 



149- 



Deciduous, applied to plants which 

 drop their leaves at certain seasons, 

 69, 162. 



Decussate arrangement, of leaves in 

 successive alternating pairs, 168 ; 

 of Sycamore (Fig. 127) ; of Epilo- 

 bium (Fig. 126). * 



Dehispence, splitting, especially of 

 sporangial or carpellary walls : in 

 fruits, 287. 



Deoxidation in photo-synthesis, 104. 



Dermatogen, a layer of cells, usually 

 superficial, giving rise to the 

 epidermis, 276 (Fig. 217, v.-viii.). 



Deschampsia caespitosa, viviparous 

 habit, 215. 



Desmidiaceae, 398. 



Desmids, alternation in, 481. 



Desmonchus, straggling by reflexed 

 pinnae, 181 (Fig. 134, vii.). 



Dextrorse twining, following hands 

 of watch, 182. 



Dextrose, in. 



Diastase, ferment converting starch 



to sugar : action of, in. 



Diatoms, 401 ; alternation in, 481. 



Dichasium, a definite or cymose 

 inflorescence, where two lateral 

 branches arise at about the same 

 level, 225 (Fig. 171). 



Dichotomy, a forking into two equal 

 branches, 317. 



Diclinous, where staminate or pistil- 

 late flowers are borne on the same 

 plant, 265. 



Dicotyledoneae, 492, 505. 



Dicotyledons, seed-plants (Angio- 

 sperms), having an embryo with 

 two seed-leaves, 3, 7 ; herbaceous 

 stems of, 35 ; woody, 46, 56 ; root 

 of, 173 (Fig. 56) ; old root, 80 

 (Figs. 63, 64) ; mechanical con- 

 struction of stem, 149 ; embryology 

 of, 275 (Fig. 217). 



Dictyota, 377, 378 ; alternation in, 

 482. 



Differentiation : of tissues, the gradu- 

 ally acquired distinction of char- 

 acter as the cells mature from an 

 undifferentiated embryonic tissue, 

 21 ; of sex, 462 ; in Brown Algae, 

 380-385 ; advantages following on, 



463- 



Digestion, intra-cellular, 203 ; by 

 Carnivorous Plants, 207. 



