473 



never saw more than one flower in the same period of e^rowth. 

 The biology has been treated by Warming; also as|regards this 

 species I can but confirm the facts [already known. F. villosa 

 is distinguishable in some main characteristics from the other 



Fig. 14. Pmguicula villosa. 



A, A plant (nat. size). B, Loniiitudinal section through flower; st. an anther. C. A flower, 

 front view; the hairs of the lower lip are omitted. D, Pistil and anthers (st); the corolla 

 has been removed. E, The upper lip with the pistil and the anthers. F, Within the 

 upper lip the foremost part of the stigma and the anthers are seen from above. G, Lon- 

 gitudinal section, somewhat oblique, through a flower; the one anther is shown in sec- 

 tion; the fibrous layer is indicated; the greater part of the pollen-grains has fallen out; 

 the foremost part of the stigma has rolled backwards down to the anthers. H, The 

 stigma, seen from above; the downward lobe is the foremost one. /, A hair from the 

 middle part of the lower lip. Bosekop, -July. (E. W.: 1886). 



two species. The hindmost part of the stigma is always well 

 developed, usually, however, it is smaller than the foremost 

 one (Fig. 14, H.) According to Warming this fact proves that 

 P. villosa represents a more primary type than the other two. 

 Both parts of the stigma are furnished with papillae on their 

 upper side and are more or less bent backward (Fig. 14, G). 



XXXVI. 31 



