1 10 The Ottawa Naturalist. [August 



Heads about 2 cm. broad, numerous in a paniculate raceme, 

 light yellow. Involucre 12 mm. high, conspicuously clothed with 

 long, soft, white hairs, bracts linear, mainly in one series 



Achenes oblong, striate, dark brown; pappus tawny. 



Hieraclum Albertinum, was collected on the fourteenth 

 of August, 1905. It was found growing abundantly with 

 Eriogonum subalptnum, Greene, Silene Lyallii, Watson, and 

 Heuchera ovalifolia, Nutt., on a grassy slope above the trail be- 

 tween Lake Louise and Moraine Lake. The long white hairs 

 with which the plant is so profusely covered give it a silvery ap- 

 pearance which is very striking and typical. 



Dry as (omentosa, sp. no v. 



Similar to D. Drummondii, Richards, but the leaves covered 

 on both surfaces with a thick white tomentum, giving them a pale 

 gray color above and white beneath; the petioles rather stout, 

 clothed with white floccose pubescence. The yellow flowers are 

 borne on stout floccose-pubescent scapes. The sepals are densely 

 glandular with purplish-black stalked glands. 



This interesting form of Dryas was collected near the summit 

 of the Pass leading from Emerald Lake into the Yoho Valley, at 

 an altitude probably of 5500 feet. It was growing in patches 

 with Drummondii ', with which it did not seem to intergrade, but 

 preserved its own individuality. 



Ranunculus apetalus, sp. nov. 



Slender, 25-37 cm. high, villous with scattered hairs, becom- 

 ing glabrate below. 



Leaves 18-50 mm. broad, the basal orbicular to cordate in 

 outline, from det-ply crenate to 5-9-lobed or divided, the divisions 

 cuneate and irregularly lobed, petioled ; the cauline divided to the 

 base, the cuneate divisions deeply and variously incised ; sessile, 

 clothed with loosely matted hairs or the lower glabrous, gray 

 green. 



Flowers several, about 1 cm. broad, borne on long peduncles. 

 Sepals 5, very concave, sub-orbicular, villous on the exterior, the 

 margins often petaloid, yellowish-green. Petals wanting. 



Head of fruit oblong to ovoid. Achenes inflated, compressed 



