290 M. WICHURA ON THE WINDING OP LEAVES. 



11. RottboelliacecB, — Lepturus incurvatus, Trin. : stem-leaves 

 right. Hemarthria fasciculata, Kth. : stem-leaves left. 



12. Andropogonea. — TricholcBna tonsa^ N. ab E. ; Elionurus 

 argenteus, N. ab E. : stem-leaves right. Saccharum cylindricum : 

 stem-leaves left. Apluda microstachya, N. ab E. : stem torn at 

 the apex into filiform strips which wind to the left. Anthistiria 

 Wightii, N. ab E. ; A, tremula, N. ab E.; A. abyssinica, Hochst. : 

 awns right at their lower part. Erianthus contortus, Elliot : 

 awns left, 



§60. 



Cyperacec^. — Cyperus refleams, Vahl ; Cyp, difformis, L. ; 

 Cyp. auricomus, Sieb. : stem-leaves right. Papyrus antiquorum, 

 Willd. : the narrow glumes enveloping the inflorescence right. 

 Chrysithrix capensis, L. ; Fimbristylis torfa, Kth. ; Eleocharis 

 palustris, R. Br. : stem-leaves left. Carex hirta, L. ; C. ampul- 

 lacea, Good. ; Rhyncospora alba, Vahl ; Schoenus nigricans, L. ; 

 Fimbristylis ferruginea,\sLh\; F. junciformis, Kth. ; Androtri- 

 chum polycephalum, Kth. ; Ficinia striata, Kth. ; Eleocharis 

 glaucescens, Schult. ; E. palustris, R. Br. ; E. uniglumis, Lk. ; 

 Scirpiis maritimus, K. ; Scirpns glaucus, N. ab E. ; Eriophorum 

 gracile, Koch ; E, latifolium, Hoppe : anthers left when de- 

 hiscent. 



§61. 



Eriocaulon€(B, — Pcepalanthus perpusillus, K\,; P, Ottonis, Kl. : 

 stem-leaves right. 



§62. 



Xyridece. — Xyris communis, Kth. ; X. subulata, R. & P. ; 

 X. arescens, Kth. ; X, str obilifera, Kth. ; X metallica, Kl. : stem- 

 leaves left. 



§63. 



Commelinacece.—TradescantiaLyoni: stem-leaves left ; I must 

 remark, however, that I have seen but one specimen of this 

 plant, on the " Pfauen-InseV^ near Potsdam. 



§ 64. 



Juncaginece. — Scheuchzeria palustris, L, This plant presents 

 individuals with right- and others with left-wound leaves. 

 Leaves of the same specimen wind constantly in the same 



