Coi,oRADo Weed Seeds 
43 
Key to GtMiera 
Seeds spherical 1 • • yciccaria 
Seeds not spherical 
Seeds reniform in outline 
Seeds very flat, thin 2 . . Saponuria 
Seeds slightly flattened, thick 
Hilum with a distinct knob on two sides Z..Silene 
Hilum nearly surrounded by a prominent protuberance.... A.. Lychnis 
Seeds heart-shaped in outline; seeds rough, dull black in color.. ^ . .Agrostemma 
Cow Herb, Cow Cockle 
(Vaccaria Medic.) 
Ovary 1-celled ; capsule opening by four tooth- 
like valves at the top; embryo curved. 
Cow Cockle {Yaccaria vaccaria (L.) Britton) 
(Fig. 61). — Seeds dull black, smooth to slightly 
rough with microscopic, rounded points ; seeds 
2-2.5 mm. in diameter, 
Soapwort, Bouncing Bet 
{Saponaria L.) 
Ovary 1-celled ; capsule oval to oblong in out- 
line, opening by four tooth-like valves at the top ; 
embryo curved into a ring around the endosperm. 
Bouncing Bet {Saponaria officinalis L.) (Fig. 
32). — Seeds dull black, each face with 6-8 concen- 
tric rows of blister-like projections which appear 
to originate at the deep notch in the edge; each 
face is marked by a deep cup-like pit near the 
notch ; seeds flat, reniform in outline, 1.2-2 mm. 
across each face. 
3, Catchffy, Campion 
{Silene L.) 
Ovary 1-celled ; capsule opening by 6 or more valves at the top ; seeds 
with rounded, prickly or spiny projections; seeds slightly flattened on each 
side, usually thick. 
Key to Species 
Seeds .5 mm. or less across each face 1..S. antirrhina 
Seeds .8-1 mm. across each face 
Projections on surface in regular concentric ridges 2..S. vulgaris 
Projections on surface not in regular ridges Z..S. noctiflora 
Fig. 62. Bounc- 
ing Bet (Sapon- 
aria officinalis). 
X 10. 
Fig. 63. Sleepy 
Catchfly (Silene 
antirrhina). A. Top 
view. B. Edge view. 
X 22 
1. Sleepy Catchfly {Silene antirrhina 
L.) (Fig. 63). — Seeds slate black to black 
in color, with 4-5 irregularly concentric rows 
of blister-like projections on each face ; seeds 
reniform to nearly circular in outline, slightly 
flattened, .4-. 5 mm. across each face. 
