264 PRINCIPLES OF PLANT-TEKATOLOGT. 



wliether by fusion of two or more organs together, or 

 by suppression of one or more organs,* has occurred, 

 this is in all cases a progressive or evolutionary event. 

 In the first-Case it results in the production of one 

 organ where before there were two or three, and where 

 such a fusion is complete, as in many instances of the- 

 median posterior petal of Veronica, the resultant must 

 no longer be regarded as double, i. e. as embodying 

 within itself the two or three original organs, but as a 

 unity, for the union which brought it into existence is 

 not a fusion to form a compound organ but a complete 

 unification, which implies as perfect an extinction of 

 the individuality of the original organs which took 

 part in the fusion, as does the suppression in situ of 

 any single organ of the fiower. 



BIBLIOGEAPHY. 



Aebee.^" On the Synanthy in the Grenus Lonicera." Journ, 



Linn. Soc, vol. xxxv (1903), pp. 463-474. 

 Aecangeli. — " Sopra varii fiori mostruosi di Narcissus e sul 



N. radiifloriis." Bull. Soc. hot. Ital., 1895, pp. 157-159, 

 Battandiee. — " Observations de Biologie vegetale." BulL 



Soc. bot. Fr., tome Ivi (1909), pp. xxxv— xxxvii. 

 Bbnecke. — " Zur Kenntniss des JDiagramms der Papaverace£& 



und Ehceadinse." Engler's Bot. Jahrb., Bd. ii (1882),. 



pp. 373-390, pi. iii. 

 Oamus. — " Les Veroniques et leurs alterations morpholo- 



giques." Eev. de bot., tome v (1886), pp. 212-220. 

 Caeeieee. — "Anomalie presentee par des Cerises." Rev, 



hort., 40« Ann. (1868), pp. 310-311. 



" Physiologic -Vegetale. Du Bourgeonnement." Loc, 



cit., 57' Ann. (1885), pp. 80-82. 



Celakovsky. — " Das Eeductionsgesetz der Bliithen." Sitzber. 

 k. bohm. Ges. Wiss., 1894, no. 3, 136 pp., pis. i-v. 



" Ueber den phylogenetischen Bntwickelungsgang- 



der Bliithe, und iiber den Ursprung der Blumenkrone." 

 Loc. cit., 1896, no. 40, 91 pp. 



* It may be doubted if tbe regular alternation of whorls, implied in these 

 two processes, has a, wholly adaptatioual significance ; it may in part be 

 regarded as the expression in the flower-structure of a basic law of nature, 

 viz. that of rhythm, activity constantly succeeded by quiescence, the wave- 

 motion to which no biological cause may be attached. 



