326 



EuG. 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. 8V2 

 mm, pistil 7^/2 mi^i to the tip of the styles. Diameter of 

 €orolla 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.; С Ryder, .5.7.1887). Parts 

 of $; a^ and a^, anthers showing different degrees of reduction, 

 a*, Dorsal view of petal. 



I have received $ flowers of this species also, gathered 

 by Lieut. С 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. 8^/2 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« 



