474 



Ranunculaceae 



Thalictrum 



~T() 



Map 976 



Thalictrum revolutum DC. 



0~~ ~^fj 

 Map 977 



Thalictrum dasycarpum Fisch. & Lall 



— "Trj 



Map 978 



Thalictrum perelegans Greene 



My no. 5946, collected on the bank of Wildcat Creek west of Greentown 

 in Howard County, I cite as unusual. My specimen arises from a node of 

 an underground stem. The stem remaining on the specimen has nine 

 nodes and is 16 cm long, and shows no decrease in size where it has been 

 broken off at both ends. 



Central Maine to Sask., southw. to Ala. and Mo. 



2. Thalictrum revolutum DC. Waxy Meadowrue. Map 976. Infre- 

 quent to frequent throughout the state in moist soil. A form with yellow 

 roots (when collected) is generally found in dry soil on wooded slopes 

 and less often in moist, sandy places. I think the form, which usually 

 has only sessile glands, should be separated as a species or variety. It 

 may be that it is Greene's Thalictrum amabilis, the type of which I have 

 not seen. I have 70 sheets of this species from Indiana and I have failed 

 to make a record of the color of the roots of many specimens but I think 

 that I made a record when the color was yellow and did not when no 

 color was evident. 



Mass. to Ont., southw. to S. C, Tenn., and Mo. 



3. Thalictrum dasycarpum Fisch. & Lall. Purple Meadowrue. Map 

 977. Infrequent to frequent throughout the state in moist or wet places. 

 It is found mostly in bogs and springy places about lakes and in low 

 places in woods and moist places along roadsides. Some of my specimens 

 of this species had yellow roots when collected. This species shows a 

 wide range in the texture, size, and shape of the leaflets and I think 

 it is also a complex. The lower surface of the leaflets varies from glabrous 

 to densely pubescent. I found a staminate specimen in Noble County that 

 had a lavender inflorescence. 



N. J., N. Dak. to Sask., southw. to Nebr. and Ariz. 



4. Thalictrum perelegans Greene. (Greene, Leaflets of Botany 2: 

 59. 1910.) (Thalictium polygamum of Indiana authors.) Map 978. I 

 have seven specimens of this species and there are two from Jefferson 



