Colorado W EEd Seeds 
39 
3. Saltwort, Russian Thistle 
{Salsola L.) 
Calyx horizontally winged at the base of the fruit, the wings forming a 
broad scarious border ; embryo coiled in a conical spiral ; endosperm wanting. 
Russian Thistle (Salsola pestifer A. Nels.) (Fig. 51). Seeds with 
calyx persistent, pale smoke-gray in color; with calyx and papery pericarp 
removed, the conical, spiral embryo is apricot-yellow in color; seeds includ- 
ing wing, 2.5-3 mm. wide, 1-1.5 mm. from base to summit; seeds with calyx 
l emoved 1-1.5 mm. wide, .5-1 mm. from base to summit. 
Fig-. 51. Russian Thistle (Salsola pestiferl. 
A. Calyx enclosing fruit, (iop viev/i. C. Calyx 
enclosing fruit, (sicle view). D. Fmbryo. x 12. 
4. Goosefoot 
{Chcnopodium (Tourn.) L.) 
Calyx 5- (rarely 4-) parted usually per- 
sistent; fruit lenticular, nearly circular in out- 
line, the edge bluntly rounded; embryo annular 
(in the form of a ring), coiled partly or fully 
around the mealy endosperm. 
Lamb’s Quarter’s {Chenopodium album L.) 
(Fig. 52).— Seeds, with calyx persistent, pale 
smoke-gray to smoke-gray in color; with calyx 
and pericarp removed, seeds black and shiny ; 
fruits 1-1.2 mm. wide, .5 mm. thick, edges 
rounded with a distinct groove leading from a 
Fig. 52. Lamb’s Quart- 
ers (Chenopodium album), 
a. Bottom view. b. Top 
view. c. Calyx enclosing 
utricle. x 12. 
marginal protuberance to the middle of each 
face ; embryo annular, usually completely sur- 
rounding the endosperm. 
5 . Orache, Salt Bush, Shad-scale 
{Atriplex (Tourn.) L.) 
Ovary 1-celled ; utricle wholly or seldom partly enclosed in the foliaceous 
bracts which are often united at the top; calyx wanting; embryo coiled in 
a ring around the endosperm. 
