264 THE AMERICAN MIDLAND NATURALIST. 
Juniperus Virginiana, L., var. pyramidalis, Carr. A rather 
handsome variety with a columnar form. Hillsides near Ro- 
chester, No. 6854, Oct. 3. 
Juniperus Virginiana, L., var. reptans, Beissn. A procum- 
bent variety indistinguishable from J. horizontalis except by 
its flowers and fruits. Rocky shores of Keweenaw Co., No. 86, 
May 15, 1884. ; 
Potamogeton alpinus, Balbis. Found on the shores of St. 
Clair River, at Marine City, No. 6751, Aug. 29. 
P. Americanus, C. & S. In Bell River at Marine City, No. 
6743, Aug. 29. Also nearby, the variety with thick, broadly« 
elliptic, obtuse, floating leaves which has been called var. No- 
vaeboracensis (Morong) Benn. No. 6744, Aug. 29. 
P. gramineus, L., var. lacustris (Fries) Farwell. In St. 
Clair River at Marine City, No. 6746, Aug. 29. Nearby was 
the var. parvifolius (Nolte) Farwell which is distinguished by 
its small, coriaceoeus floating leaves. No. 6748, Aug. 29. 
Potamogeton amplifolius, Tuckerm. Along the shores of 
lakes in shallow water near Linden, No. 6668, Aug. 1; Lake 
Orion, No. 6838, Sept. 26, (no coriaceous floating leaves). 
Potamogeton angustifolius, Berchtold & Presl. In. deep 
water, Lake Orion, No. 900, Aug. 29, 1895 and Lakeville Lake, 
Billington, Farwell and Gladewitz, No. 6653, July 26, 1923 (no 
coriaceous floating leaves ‘but upper leaves subcoriaceous) ; 
Hamburg, No. 6765, Sept. 5. 
Potamogeton lucens, Linn. Similar to the preceding but 
with longer and narrower leaves none of which is subcoria- 
ceous. In deep water Lake Orion, No. 905, Aug. 29, 1895, and 
in Lakeville Lake, Billington, Farwell and Gladewitz, No. 
5333, July 20, 1919, and July 26, 1923. . 
Potamogeton perfoliatus, L. In the St. Clair River at Ma- 
rine City, No. 6752, Aug. 29. 
Potamogeton -perfoliatus, L., var. Richardsonii, Benn. In 
the St. Clair River at Marine City, No. 6753, Aug. 29. 
Potamogeton perfoliatus, L., var. bupleuroides (Fernald) n. 
comb. P. bupleuroides Fernald, Rhodora X (1908) 46. In the 
St. Clair River at Marine City. No. 6754, Aug. 29. P. Richard- 
sonii and P. bupleuroides pass insensibly into P. perfoliatus 
