Notes on the Flora of Ontario. 219 



has round-lobed leaves and the latter acute-lobed ones and these con- 

 stitute the chief point of separation unless the fruit be examined. 



The next genus Anemonella includes only one species A. thalic- 

 t/oides, the Thalidrum anemonoides of Gray's Manual. This is a lovely 

 little plant, growing in clumps from fascicled tubiform roots, and is well 

 worthy of a place in our gardens. It is common in open woods, in rocky 

 places and in fence corners from Toronto westward and southward in 

 the Niagara Peninsula. 



Following this is the genus Thalidrum with three species, two of 

 which are quite common, the third being rather obscure may. also be 

 common but being seldom collected is considered rare. The common- 

 est species is T. dioicum found in all rich woods throughout the province. 

 In the woods around Ottawa this is a lovely thing in early spring. As 

 its name indicates the stamens are on one plant and 

 the pistils on another. The panicles in the male 



plant are greenish purple. The stamens have long drooping filaments 

 and fuscous anthers which when grouped make prominent objects in 

 the bare spring woods. 



Another species T. polygamum, Muhl. ( T. Cornuti, LJ is found in 

 river bottoms and around springs and by brooks throughout the country. 

 In the neighbourhood of Ottawa, especially along the Rideau River 

 above Billings' Bridge, it grows into a large bushy plant over five feet 

 high. It flowers late and is seldom collected with ripe seeds. 



Our other species is T. purpurascens, which has much the same 

 general appearance but does not grow so tall nor in as damp soil. The 

 stem of T. polygamum, is mostly green and glabrous and the flowers 

 white, while that of T. purpurascens is purplish and a little glandular, 

 and the flowers are purple or rarely whitish. These^two species should 

 be collected in fruit and carefully preserved as it is necessary to work 

 out the distribution of the latter. The only authentic locality in 

 Ontario known to the writer is on Dunning's farm, near Drummond- 

 ville, Niagara Falls. Dr. Burgess has collected it near London. The 

 specimens collected along the Ottawa by Dr. Ami are doubtful as they 

 are without fruit. 



