296 M. WICHURA ON THE WINDING OF LEAVES. 



85. 



Plumbaginea. Armeria, in all the species with which I am 

 acquainted : petals wound to the left in the contorted aestivation. 

 The genus Armeria is essentially distinguished by this point 

 from the allied genus Statice, in the distichous inflorescence of 

 which right- and left- wound buds alternate regularly. But this 

 law seems only to be manifested clearly in the blue-flowered 

 species of the genus Statice. Two red-flowered species, one of 

 which is St. acicularis, exhibited a predominance of right-wound 

 flower-buds, with the intermixture of a small number of left- 

 wound. 



86. 



Composite. Liatris punctata, Hook. ; L. cylindracea, MX. ; 

 L. squarrosa, L. ciliata ; Eclopes parallelinervis, Lessing ; Gero- 

 pogon glaber : stem-leaves right. Cephalophora aromatica, 

 Schrad. ; Calycadenia villosa, D.C.; C. cephalotes, D.C.; Me- 

 talasia, R. Br. ; Stabe, Less. almost all the species of these 

 genera Perotriche tortilis, Cass. ; Erythropogon umbellatum, 

 D.C.; Elytropappus glandulosus, Less.; E. ambiguus, D.C. ; 

 Disparage ericoides, Gaertn.; D. lasiocarpa, Cass.; Centaurea 

 depressa, M. B. : stein-leaves left. For Galatella and Chryso- 

 coma, see 45. Podolepis subulata, Steetz: points of the 

 membranous leaves of the anthodium not quite % right. 

 Prenanthes purpurea, L. : radiant florets thrown back toward 

 the left. R. Brown has directed attention to the windings of 

 the style to the extent of about |- of its circumference. The 

 arms of the stigma which stand front and back in reference to 

 the axis of the inflorescence, are thus brought into a lateral 

 position. I have observed this phenomenon, not in all, but in 

 a great multitude of Compositag, and have never detected a de- 

 finite law of direction. 



87. 



Campanulaceae. Campanula Loreyi, Pollin. : apex of the calyx 

 left. Campanula patula, L. ; (7. Rapunculus, L. ; C. Lcefflingii, 

 Brot. ; C. persicifolia, L. ; C. cana, Wall. ; Phyteuma canescens, 

 W. et K. : dehiscing anthers to the right. Campanula rapun- 

 culoides, L. ; C. Trachelium, L. ; C. glomerata, L. ; C. bar bat a, 



