lah 
WEED SEEDS FOUND WITH BLUEGRASS SEEDS. 34 
Found in bluegrass seed of various species, especially common in seed of Kentucky 
bluegrass. The relatively prominent chalaza and the radially uneven surface dis- 
tinguish them from the seed of the closely allied Veronica 
peregrina, which sometimes occurs in commercial seed. 
Juncus tenuis Willd.” 
° e es 
b 
rh 
Seeds very minute, about 4 mm. long, broadly spindle- 
shaped, the extremities usually slightly curved; surface Fi. 31.—Seeds of slender rush 
(as seen under a lens) nearly smooth; color reddish (Juncus tenuis): a, seeds en- 
Sees : : larged; 6, natural size of 
yellow, darker at the extremities, which sometimes bear ....4. 
a small white tissue. (Fig. 31.) 
Often quite abundant in poorly cleaned Kentucky bluegrass seed, sometimes cling- 
ing in bunches of several seeds each. 
SLENDER RUSH. 
Juncoides campestre (L.) Kuntze. 
FIELD RUSH. 
6 
a 4 Seeds 14-13 mm. long, oval, not flattened, the ex- 
ce tremities unequally pointed, the basal extremity turned 
8 slightly to one side and consisting of soft white or 
b yellowish tissue; a narrow and often indistinctly de- 
Tr eae of Geld wate CUE fined whitish ridge extends from the base to the apex; 
Een Caapesic\a a= dificrent body of the seed wine-colored and semitranslucent or 
views; b, natural size of seeds. grayish. (Fig. 32.) 
Found frequently in the seed of wood meadow 
grass and of the Poa sudetica of European origin. 
Juncoides albida DC 
WOOD RUSH. 
Seeds 1-14 mm. long, narrowly oval, not flattened; base without an appendage of 
soft tissue; apex more acutely pointed than the base; 
a distinct brown or reddish brown ridge joins the base 
and apex; body of the seed reddish brown or wine- 
colored, often semitranslucent. (Fig. 33.) 
Found in various species of European-grown blue- 
grass seed. The usually smaller size, absence of the 
basal appendage, and more distinct and constant oO ee aes ze Af Spsodruah Chink: 
dish-brown lateral ridge serve to distinguish these — oides athida): a, different views: 
from the seeds of Juncoides campestre. b, natural size of seeds. 
Carex cephalophora Muhl. 
OVAL-HEADED SEDGE. 
Seeds (akenes) 13-2 mm. long, lens-shaped and broadly ovate, contracted at the 
base and tipped at the apex by a conical appendage (the base of the style); surface 
smooth and dull; color varying from light to dark brown; apical appendage often 
broken away in seeds found in commercial samples; perigynium broadly ovate- 
lanceolate, plano-convex, the tapering extremity usually rough-edged and notched at 
