ARTIFICIAL KEY TO FAMILIES 
Flowers white or pink, in long slender catkin-like spikes or 
spikes with small flowers 44 
43. Flowers never white, sna in rounded ; masses or - clusters ¢ or 
in spikes : 45 
43. Flowers neither in close masses nor in spikes 46 
44. Fruit, 4 fleshy carpels . . . . . . +. SAURURACEAE, Pg. 166 
44. Fruit a dark purple berry . . . . . PHYTOLACCACEAE. Pg. 221 
45. Calyx green or colored, minute . . . CHENOPODEACEAE, Pg. 211 
45. Calyx of dry scales or husks, and surrounded by dry, often 
colored bracts. . . . . . . +. AMARANTHACEAE. Pg. 218 
46. Calyx attached to the whole extent of the ovary. (50) 
ce ss gee iT Wein te. UP ARISTOLOCHIACEAE. Pg. 199 
46. Calyx not attached to the ovary . 47 
47. Fruit a 3-lobed capsule. (51) . . . . EUPHORBIACEAE. Pg. 374 
47. Fruit an indefinite number of 1-celled carpels. 
Some species of RANUNCULACEAE. Pg. 246 
48. Plants entirely aquatic . 49 
48. Plants terrestrial 50 
49. Leaves opposite . . . . . . . +. CALLITRICHACEAE, Pg. 379 
49. Leaves in whorls. . . . . . . . HALORAGIDACEAE. Pg. 431 
52 
50. Leaves with stipules, (52) 51 
50. Leaves without stipules 52 
51. Twining vine or a plant with leaves of 5 leaflets from a com- 
mon point of insertion PART OF URTICACEAE Pg. 194 
51. Plants not twining and leaves not divided into leaflets 
URTICACEAE. Pg. 194 
52. Fruit a 3-celled capsule ? 53 
52. Fruit usually a 1-celled capsule. 
. Species in CARYOPHYLLACEAE. Pg. 225 
53. Capsule pendulous. (51) . . . . . EupnHorpiacear, Pg. 374 
53. Capsule not pendulous . . . . . «. « ~ AIZOACEAE, Pg, 221 
b. FLOWERS WITH SEVERAL PETALS. POLYPETALAE 
54. Trees, shrubs, woody vines . . «. . +. + «+ + ~ 55 and 60 
SEG Be arr Ome rae a” « CZ 
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