GLOSSAKY AND INDEX. 273 



cortical, pertaining to the cortex or bark, 40. 



corymb, an indeterminate, rounded or ilat-topped, inflorescence, inter- 

 mediate between a raceme and an umbel. 



cotyledon, a seed-leaf, 2. 



crenate, serrate or dentate, with rounded teeth ; scalloped, 58. 



cross-fertilization, fertilization by means of pollen brought from (1) an- 

 other flower of the same plant ; (2) another plant of the same 

 horticultural variety ; (3) a distinct plant of the same species. Gen- 

 erally the greatest advantage accrues from crosses of the third sort. 



cruciferous, pertaining or belonging to the Cruciferse or mustard family. 



cruciform, cross-shaped, 191. 



cryptogamous, without true flowers, and producing spores instead of 

 seeds. Gf. phEenogamous. The distinction is less absolute than was 

 formerly supposed. 



crystalloid, a proteinaceous body of crystalline form occurring commonly 

 in aleurone grains, 8. 



cucullus (pi. cuculli) , a hood-like body, particularly the hood-like struct- 

 ure forming part of the crown of Asolepias, 228. 



culm, the stem of grasses ; the term has also been applied to the stem of 

 sedges, 157. 



cushion, 133. 



cutin, a protective substance related to cork, 69. 



cyme, a determinate, commonly flat-topped, inflorescence, resembling a 

 corymb, but centrifugal in development. 



deciduous, falling off at the end of a limited natural period, as leaves in 

 autumn ; of floral envelopes, falling before the fruit is formed, 

 131, 153. 



decompound, several times compound, 58. 



decurrent, running down the stem below the point of insertion, 58. 



dehiscence, act or mode of opening, 88. 



deltoid, triangular, like the Greek letter A. 



dentate, toothed, 58. 



diadelphous, united by the filaments into two sets, 198. 



dichogamy, 86. 



dichotomous, bifurcate, regularly dividing by twos. True dichotomy Is 

 very rare in phanerogams, although the term is commonly applied in 

 descriptive botany, when by the suppression of an internode two 

 axillary growths seem to arise from the same level. 



diclinous, having stamens and pistils in separate flowers, 85. 



dicotyledonous, having two cotyledons ; belonging to the class of flower- 

 ing plants characterized by having an embryo with two cotyledons, 



