Contributions to Canadian Botany. 85 



New variety first collected in 1818 near Lake Athabasca 

 by Prof. Macoun, for whom it is named, and again by him 

 at the head of Lake Louise, Rocky Mts., in 1891. 



(20.) E. Hornemanni, Reichenb. 



Nearly all the references under E. origanifolium, Lam., 

 Macoun's Catalogue of Canadian Plants, p. 169, belong here. 



In one or other of its forms from Labrador to Vancouver 

 Island. 



(21.) E. alpinum, L. 



From Kicking Horse Lake to Vancouver Island. Gener- 

 ally found with the preceding species which it greatly 

 resembles. E. Hornemanni is " somewhat crisp-hairy in the 

 inflorescence and along the decurrent lines or slightly glan- 

 dular at top, otherwise glabrate " ; in E. alpinum the inflor- 

 escence and decurrent lines are more nearly glabrous. In 

 the former species the seeds are " rather abruptly short- 

 appendaged, from nearly smooth to very rough ;" in the 

 latter they are " smooth gradually alternated at apex with 

 very evident beak." 



(22.) E. Oregonense, Hausskn. 



Borders of rivulets, Swamp River, B.C. (Macoun.) Only 

 Canadian station. / 



(23.) E. anagallidifolium, Lam. 



Specimens in our herbarium are from Cape Chudleigh, 

 Hudson Strait. (Dr. Bell.) Rocky Mts. (Drunwiond.) Kick- 

 ing Horse Lake, Rocky Mts., and Mt. Benson, Vancouver 

 Island. (Macoun.) 



(24.) E. clavatum, Trelease. 



A span high, mostly densely caespitose, the slender stems 

 ascending, glabrate to sparingly glandular throughout ; 

 leaves 15 to 20 mm. long, divergent, broadly ovate, very 

 obtuse, subentire to remotely serrulate, mostly rounded to 

 evident petioles, firm, drying brownish ; flowers rather few, 

 suberect, petals rose-colored, about 5 mm. long ; capsules 25 

 mm., subclavate arcuately divergent, the lowest often not 



