296 M. WICHURA ON THE WINDING OF LEAVES. 



§85. 



Plumbaginece. — 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. 



Composites, — Liatris punctata^ Hook. ; L. cylindraceay 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; 

 Disparago ericoides, Gaertn.; J), lasiocarpa, Cass.; Centaurea 

 depressa, M. B. : stem-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 w indings 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 phaenomenon, not in all, but in 

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

 finite law of direction. 



§87. 



Campanulacece, — Campanula Loreyi, Pollin. : apex of the calyx 

 left. Campanula patula, L. ; C. 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. barbata, 



