129 
P. natans A, Eat., and forma Hartwrightii (Gray) Stanford. See Rhod. xxvii, 156 
(1925). Water Smartweed. 
Common on lake and slough margins, and in sluggish streams through- 
out the area. The creeping mud plant with hairy leaves and stem, some- 
times known as P. Hartwrightii , is clearly no more than a form of the aqua- 
tic one, if it should have even that much designation. Flowers appear in the 
latter part of July and in the first half of August. Fruits begin to mature 
about the middle of August. 
Crec (Mamawi) creek, No. 2248; east shore of lake Mamawi, Nos. 
2249, 2250; Murdock Creek district, Nos. 2241, 2242; Government Hay 
Camp district, Slave river, Nos. 2245, 2251; Fort Smith, No. 663; Pine Lake 
district, No. 2240; Round lake, about 18 miles south of Pine lake, No. 2244; 
Moose (Eight) Lake district, Nos. 2246, 2247; sink-hole 16 miles east of 
Moose lake, No. 2243. 
P. Convolvulus L, Bilderdykia Convolvulus (L.) Dunn. Bindweed. 
Occasional in the settled districts, where it occupies dry cleared ground 
and is probably adventive. Found in the interior only at a much-frequented 
camp site. In early flower July 12, and with mature fruit in the early part 
of August. 
East shore of lake Mamawi, Nos. 2237, 2239; Government Hay Camp, 
Slave river, No. 2236; Observation ridge, about 10 miles south of Pine lake, 
No. 2238. 
CHENOPODIACEAE 
Chenopodium capitatum (L.) Asch. Blitvm capitatum L. Strawberry Blight. 
Common in settlements, cabin clearings, buffalo wallows, burned areas, 
and on the banks of streams where the soil is disturbed by under-cutting. 
In flower during the latter part of June, and producing its fleshy, red 
spikes during July and August. 
Government Hay Camp, Slave river, No. 2266; Fort Smith (Coll. Mrs. 
Conibear) No. 676; Pine Lake district, No. 2265; base of eastern slope of 
Caribou mountains, Nos. 2267, 2268; lower Slave river, No. 675; Little 
Buffalo river, Russell, No. 35. 
C. rubrum L. Red Goosefoot. 
Apparently confined to the Salt Plains, where it is occasional. Col- 
lected with immature fruit August 19. 
Near Heart (Raup) lake, No. 2264. 
C. album L. Lamb’s Quarters, Pigweed. 
Abundant as a weed in settlements and cabin clearings throughout the 
region. In the interior upland it occasionally appears in damp, recently 
burned areas, and in damp sink -hole meadows. A common and excellent 
source of “ greens ” when in its immature stages of growth. Plants 4 to 6 
inches high are available in the latter part of June or early July, and in lesser 
numbers later in the summer. Flowers usually occur during July, and fruits 
about mid-August. 
