304 M. WICHUEA ON THE WINDING OF LEAVES. 



117. 



Sterculiacea. For Helicteres, and its contorted aestivation, 

 see 16. Helicteres guazumcefolia, H. et B. : fruits of the two- 

 flowered cymes probably wound towards opposite sides on ac- 

 count of the antidromy of their leaf-spirals. I have only been 

 able to examine the fruits of this one species, but think the rest 

 would exhibit a similar character. 



H8. 



Xanthoxylece. Ailanthus glandulosus, Desf. : fruits wound to 

 the right (fig. 3) at the tips. 



119- 



Oxalidea. Besides the winding of the petals in the bud, 

 already mentioned, I observed a very distinct and constant 

 winding of the stem-leaves to the right, in a species of Oxalis 

 which was cultivated in 1848, in Decker's Nurseries at Berlin, 

 under the doubtful name of Oxalis palmata. 



120. 



Onagrariece. (CEnotherea] : segments of the corolla left in 

 the bud. Lopezia : the upper part of the solitary existing sta- 

 men to the right. 



121. 



Combretacece. Combretum purpureum, Vahl : petals in the 

 bud left. 



122. 



Philadelphea. Philadelphus coronarius, L. ; P. Gordonianus, 

 Lindl. : petals in the bud right. Philadelphus hirsutus : petals 

 in the bud left. 



123. 



Melastomacete. Petals in the bud left, probably in all the 

 Melastomaceae. For the winding of the sepals and anthers in 

 Arthrostemma Humboldtii, see 47. 



124. 



Myrtacea. Callistemon and Metrosideros : stalks of the stem- 

 leaves about towards the left. For the winding of the stem- 

 leaves of Eucalyptus and Melaleuca, see 45 and 46. 



