1910] The Ottawa Naturalist. 29 



does the pistillate plant in flower show a stamen or tv/o, or three, 

 in some of the flowers; but the staminate plants appear to be 

 always purely staminate. Truly hermaphrodite individuals are 

 a rarity. 



In the Herbarium of the Geological Survey T . coryyiellum is 

 well represented, and I cite a few of the numbers: 32,763, from 

 King's Co., N.B., A. P. Chadbourne. July, 1883; 66,630, Port a 

 Persis, Que., 18 Aug., 1905, Macoun, pistillate plants, with no 

 trace of stamens; Cache Lake, Algonquin Park, 5 July, 1900, 

 tVvO numbers, 23,260 a purely staminate plant with ample panicle, 

 23,259, several small panicles of truly hermaphrodite flowers, 

 but stamens very few nevertheless; 32,7 55 is a sheet from 

 Southern New Hampshire, by Miss M. A. Day, at Jaffray, 23 

 July, 1896. The two specimens are strictly male and female; 

 and in two or three points they fall short of responding to De 

 Candolle's diagnosis of T. corynellum, for the traces of pubescence 

 .in the lower face of the leaves are verv faint, while the carpels, 

 instead of being glabrous are distinctly though sparsely setulose- 

 hairy ; also thev are fairly, though shortly stipitate, thus inclining 

 to T. dasycarpum, to which, however, they do not seem to be 

 referable. 



Thalictrum leucocrinum. Stout and large, the thick 

 hollow stems both angled and striate, green and glabrous, the 

 branches of the panicle sparsely and minutely setulose; lowest 

 leaves not known; middle cauline sessile, not large, of a deep 

 but not dark green above and beset with scattered short setulose 

 hairs, underneath of a yellowish rather than glaucous green, and 

 subtomentulose with yellowish hairs, these more copious along 

 the veins; terminal leaflets hardly f -inch long, round-obovate, 

 obtuse at base, 3-lobed at apex, the lobes obtuse, the large middle 

 one mucronate, lateral leaflets smaller, oval, entire; panicle of 

 staminate plant ample, its branches ascending, copiously flori- 

 ferous, the flowers large; sepals oval, obtuse; filaments strongly 

 clavate, the outer series thicker at summit than their oblong 

 obtuse anthers; panicle of pistillate plant smaller, compact; 

 irr mature carpels slenderly fusiform, substipitate, sprinkled with 

 a few minute setulose hairs, the stigmas straight. 



Specimens in the herbarium of Mr. John Donnell Smith, 

 collected by himself on Campobello Island, N.B., between 17 

 July and 20 Aug., 1888. They are labelled T. purpurascens, and 

 for the usual reason, no doubt .that the plant is strictly dioecious, 

 the clavate character of the stamens of course failing to be noted. 

 ThepecuHar hueof the herbage,and the characteristic pubescence, 

 this on both faces of the leaves, precludes our referring this to 

 either T. corynellum on the one hand, or T. dasycarpum on the. 

 other. 



