378 BOTANICAL GAZETTE [MAY 
2. The seasonal change in the number of rays is clearly observ- 
able in this species. 
3. All the classes in individual variation have a tendency to fluctu- 
ate on one side or other of the curve of the racial variation, and appear 
to be almost continuous, 
4. The number of rays and that of disk florets change correlatively 
to each other in a tolerably marked degree. 
BoTANICAL INSTITUTE, COLLEGE OF SCIENCE 
IMPERIAL UNIVERSITY, Tokyo, JAPAN 
LITERATURE CITED 
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Centralbl. 64: 1895. 
2. , Eine fiinfgipfelige Variationskurve. Ber. Deutsch. Bot. Gesell. 
14: 1896. 
: , Weiteres iiber Fibonacci-Curven. Bot. Centralbl. 68: 1896. 
Haacke, Entwickelungsmechanische Untersuchungen. Biol. Centralbl. 
16: 1896. 
Lupwic, Das Gesetz der Variabilitit der Zahl der Zungenbliiten von 
Chrysanthemum Leucanihemum. Bot. Centralbl. 71: 1897. 
6. ———,, Nachtrigliche Bemerkungen iiber die Multipla der Fibonacci- 
Zahlen ‘ond die Coexistenz — Bewegungen bei der Variation der Pflan- 
zen. Bot. Centralbl. 71:1 
———, Ueber Seen SA Lh Bot. Centralbl. 75: 105. 1898. 
Lucas, Variation in the number of ray flowers in the white daisy. Amer. 
Nat. 32:509. 1898. 
9. Prarson, The grammar of science. r1goo. 
o. Lupwic, Variationsstatistische Probleme und Materialien. Biomet. 1+1 
Igol. 
11. WELDON, Change in organic correlation of Ficaria ranunculoides during the 
flowering season. Biomet. 1:125. 1gor. 
12. SHULL, A quantitative study of variation in the bracts, rays, and disk florets 
of Aster ae A. novae-angliae, A. puniceus, and A. prenanthoi 
Amer. Nat. 36:1 
13. TOWER, Vitae | in cs ray flowers of Chrysanthemum Leucanthemum, etc. 
Biomet. 1: 309. 1902. 
14. Lucas, Variation in the ray flowers of the common cone flowers (Rudbeckia 
hirta). Amer. Nat. 38: 1902. 
15. DAvENPORT, Statistical methods with special reference to biological varia- 
tion. 1904. 
. Korrsa, Variation in the ray flowers of some Compositae. Bot. Mag- 
Tokyo 22:nos. 256-258. 1908. 
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