BOTANICAL GLEANINGS IN MICHIGAN. 271 
ficient to distinguish it at any season of the year; the leaves 
are apt to be raised above the surface of the water. South- 
western corner of Avon township, Oakland Co., No. 6871, Oct. 
17. 
Ranunculus acris, L., var. Steveni (Andrz.) Lange. This va- 
riety is distinguished by its broad leaf segments. Imlay City 
near the railway tracks, No. 6692, August 15. 
Isopyrum biternatum (Raf.) Torr. and Gr. The flowering 
season had long passed but the plants were in perfect fruiting 
condition. Grand Ledge, No. 6549, June 10, 1923. 
Nigella Damascena, L. Roadsides at Marine City; No. 6755, 
August 29. 
Sassafras Sassafras (L.) Karst. Britton and Brown give 
the maximum height of this tree as 125 feet with a diameter 
of 7 feet. I had never heard of any Sassafras, nor seen any, 
that had a larger diameter than 8 or 10 inches in the region 
from Michigan to Alabama. It was, therefore, with much 
surprise that on May 23, Mr. Gladewitz and I found a tree of 
this species along the roadside not far from Washington, that 
measured 11 feet in girth about 5 feet from the ground. The 
trunk was about 12 feet in height and split through the middle 
and spread apart as though it had at some time been struck 
with lightning; the trunk gave rise to 5 large branches all 
springing from about the same point, each about one foot in 
diameter. Compared with the above quoted dimensions this 
would be a small tree. It was in full flower and we borrowed 
a ladder from a nearby farmer to procure specimens; No. 
6487. 
Sinapis alba, L. The White Mustard is not often encoun- 
tered in southeastern Michigan; but it is quite frequent along 
the railways near Mt. Clemens; No. 6859, October 10. 
Krucastrum Gallicum (Willd.) O. E. Schulz. Monroe, No. 
6698, August 22; Whitmore Lake, No. 6775, September 29; 
Rochester, No. 6849, October 3. 
Diplotaxis tenuifolia (L.) DC. Banks of the Grand Trunk 
railroad near Linden. New to Michigan, so far as I can tell; 
No. 6667, August 1. 
Radicula sylvestris (L.) Druce. Mr. Walpole showed us a 
