M. WICHURA ON THE WINDING OF LEAVES. 301 



in which all these phaenomena are exhibited with especial clear- 

 ness. Probably traces of them might be discovered in all spe- 

 cies. Anthocercis littorea : the narrow, lanceolate segments of 

 the corolla to the right after the flower is open. 



101. 



Acanthacece. Gendarussa orchioides, N. ab E. : stem -leaves 

 to the left. Peristrophe caulopsila, N. ab E. ; P. Kotschyana, 

 N. ab E. ; P. speciosa, N. ab E. ; Hypoestes aristata, R. Br. ; 

 H. polymorpha, N, ab E. : tube of corolla right. 



102. 



Primulacea. Lysimachia punctata, Wall. : sepals convoluted 

 to the left at their tops in the bud. Lysimachia, Lubinia, Ana- 

 galliS) Cyclamen, Trientalis, and Samolus littoralis, R. Br. : 

 segments of corolla left in the bud. Cyclamen europceum, L. ; 

 Lysimachia punctata, Wallr. : segments of the corolla right after 

 the flower is open. 



103. 



Cesneracece. Dorcoceras hygrometrica, Bge. : the walls of 

 the dehiscent capsule left. 



104. 



Sapotacea. Mimusops dissecta, Spr. (Herb. Gen. Berol.) : the 

 linear-lanceolate acuminated segments of the flower left, after 

 the flower is open. 



105. 



Myrsinaceff. Segments of the flower frequently wound in 

 the bud, and then constantly towards the left. " Lobis petalisve, 

 aestivatione varia, saepius sinistrorsum contorta/' says Alph. 

 DeCandolle* of this family. According to his observations, 

 Ardisia Pickerinyia, Torr. & Gray, has right-wound petals. The 

 segments of the calyx are said to wind to the right. I have not 

 investigated this family myself. 



* Prod. viii. p. 75. 



