292 M.WICHURA ON THE WINDING OF LEAVES. 



F. pyrenaica, L., and F. montana, Hoppe. Between many of 

 the oppositely winding species there exists so close an affinity 

 that hybridizing would be most probably successful. It would 

 be interesting to discover the direction in which the leaves of 

 such a hybrid would wind. For the winding leaves of the 

 Allia see 37. Gagea minima, Salisb. : segments of the peri- 

 anth left during the withering of the flower. Massonia latifolia, 

 L. : the filiform bracts of the flowers right. 



67- 



Smilacea. Streptopus perfoliatus, L. : segments of the peri- 

 anth left after the flower has opened. Paris quadrifolia, L. : 

 the attenuated points of the four st'em-leaves, the leaflets of the 

 perigone, both those of the inner and the outer, wind to the left 

 in the bud in the contorted aestivation, and likewise after the 

 flower has opened; finally also the dehiscing anthers and the 

 style, all left, 



68. 



Hamadoracece. Conostylis bracteata, Hcemodorumplanifoliumi 

 stem-leaves right. Barbacenia tricolor., Mart. : stem-leaves 

 rolled together like ringlets, without definable order, sometimes 

 left, sometimes right. Vellozia variabilis, Mart. : the dehiscing 

 anthers left. 



69. 



Hypoxidea. Hypoxis gracilis, Lehm. ; Curculigo brevifolia : 

 stem-leaves right. 



70. 



Iridea. Moraa filiformis, Thunb. ; Tritonia lineata, Ker.; 

 all the species I know of Ixia and Gladiolus, together with the 

 species of Iris with straight, narrow, linear leaves, e. g. Iris si- 

 birica, L. ; /. Pallasii, Goldb. ; Trichonema chloroleucum, Ker., 

 and several species of Tritonia which were temporarily culti- 

 vated without names in the Berlin Botanic Garden in 1848 : 

 stem-leaves left. In the species of Iris with broad, sabre- 

 shaped leaves, e. g. /. lurida, Ait., 7. germanica, L., and /. Pseud- 

 AcoruSy the attenuated points wind sometimes right and some- 

 times left. For Watsoniafulgens, Pers., and W. aktroides, Ker., 



