326 



Eue Warming. 



the anthers, are situated just at the narrow throat. A large 

 quantity of pollen-grains may be found on the stigmas, 

 some of them germinating. Six styles may occur. Petals 

 12 — 12^2 mm. Throat-scales hollow. Dehisced cal.-st. 8^2 

 mm, pistil 7 1 / 2 mm to the tip of the styles. Diameter of 

 corolla 12 mm finally. Fruit appears to be set very regularly. 

 (See expanation of Fig. 41). 



Fig. 42. Melandrium triflorum. 

 From Greenland (about 73° N. lat.; C. Ryder, 5.7.1887). Parts 

 of $; a 1 and a 2 , anthers showing different degrees of reduction. 

 a 4 , Dorsal view of petal. 



I have received $ flowers of this species also, gathered 

 by Lieut. C. Ryder at about 73° N. lat. in West Green- 

 land; one of them is illustrated in Fig. 42. Four of its cor.-st. 

 contain a little pollen, but it is not normal; in another flower 

 only one or two of the cor.-st. contained a little pollen. All 

 the cal.-st. are smaller than the cor.-st. and more reduced. 

 Petals 13 mm, cal.-st. 6 mm, cor.-st. ß 1 ^ mm, styles 5 mm, 

 diameter of corolla 8 — 10 mm. 



Transitional forms from £ to ? occur with a few or 

 several anthers developed, for instance, all the cal.-st. 

 sterile, and all the cor.-st. normal and longer than the cal.-st. 



