Part 1, 1916] CHENOPODIACEAE 
Leaves of about the same color on both surfaces; sides of the 
bracts nearly always conspicuously tuberculate. 
Leaves white beneath, green on the upper surface; sides of the 
bracts usually unappendaged. . 
Staminate glomerules axillary, or in very short, simple spikes. 
Sides of the bracts tuberculate, muricate, or cristate. 
Bracts 1.5-2 mm. long. 
Bracts 3 mm. long. 
Sides of the bracts not appendaged. 
Leaf-blades white, at least beneath. 
Bracts 3-4 mm. long. 
Bracts 2 mm. long. 
Leaves white beneath, green on the upper surface; bracts 
nearly orbicular, the margins with numerous teeth. 
Leaves equally white on both surfaces; bracts cuneate- 
orbicular, 5-dentate at the apex. 
Leaf-blades green on both surfaces. 
Leaf-blades entire. 
Sides of at least some of the bracts conspicuously tuberculate or cristate. 
Leaf-blades concolorous. 
Staminate glomerules terminal, or in terminal or axillary spikes; 
seed about 2 mm. long; leaf-blades 5-15 mm. wide. 
Staminate glomerules axillary; seed 1.5 mm. long; leaf-blades 
3 mm. wide or less. 
es white beneath, green on the upper surface, mostly 
inear. 
Sides of the bracts typically smooth, sometimes inconspicuously 
tuberculate. 
Bracts 4-5 mm. long. 
Bracts 1.5-3 mm. long. 
Staminate glomerules all axillary. 
Staminate glomerules chiefly in terminal spikes. 
Perennial, loosely furfuraceous; branches terete; bracts not 
compressed. 
Annuals, closely furfuraceous; branches angled; bracts com- 
pressed. 
Bracts 2—-2.5 mm. long, longer than broad. 
Bracts 2.5-3 mm. long, usually broader than long. 
Sides of the bracts 3-nerved, the margins deeply 
dentate; staminate spikes short; leaf-blades 7-15 
mm. long, short-petiolate. 
Sides of the bracts not 3-nerved, the margins shallowly 
dentate; staminate spikes elongate; leaf-blades 
10-25 mm. long, sessile. 
XV. ELEeGANTES 
Sides of the bracts muricate, 
Sides of the bracts smooth. ‘ 
Leaf-blades, at least some of them, dentate; bracts deeply dentate. 
Terminal tooth of the bract much larger and broader than the 
lateral ones; bracts sessile, 3-4 mm. long. 
Terminal tooth of the bract similar to the lateral ones; bracts 
pedicellate, 3 mm. long. 
Leaf-blades entire; bracts shallowly denticulate. 
XVI. Lrucopay.Lag 
Plants procumbent or decumbent; leaf-blades rounded or obtuse at the 
apex. 
Plants erect; leaf-blades acute. 
XVII. WaATSONIANAE 
Bracts 4-6 mm. long, acute; leaf-blades 3-8 mm. wide. : 
Bracts 2 mm. long, rounded at the apex; leaf-blades 1-1.5 mm. wide. 
XVIII. BarcLayANAE 
Leaf-blades, at least some of them, dentate. 
Leaf-blades entire. 
Bracts conspicuously broader than long. 
Plants loosely farinose; bracts 5~6 mm. broad, the sides smooth or 
jnconspicuously tuberculate. . 
Plants closely furfuraceous; bracts 6-8 mm. broad, the sides sharply 
muricate. 
Bracts as long as broad, often much longer. 
Bracts strongly compressed, nearly free, the sides slightly tubercu- 
late or smooth. . 
Branches herbaceous; leaves on petioles one-third as long as the 
blades or shorter. 
41. 
42, 
44, 
45. 
46. 
47. 
48. 
57. 
49. 
50. 
43, 
$1. 
55. 
56. 
52. 
53. 
54. 
58. 
59. 
60. 
61. 
62. 
63. 
64. 
65. 
66. 
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68. 
37 
. Servenana. 
. Wrightii. 
. muricata. 
. pentandra. 
. confinis. 
. glomerata. 
. domingensis. 
. Davidsonii. 
. arenaria. 
. texana. 
. linifolia. 
. Aldamae. 
. Pacifica. 
. Coulteri. 
. Wardii. 
. pueblensis, 
. tampicensis. 
. Thornberi. 
. cyclostegia. 
. elegans. 
. fasciculata. 
. leucophylla. 
. fruticulosa. 
. Watsoni. 
. malamorensis. 
. lurida. 
. dilatata. 
. Rosei. 
