5 flower common, outer parts 1/4-1/2 in. long. Page 2
51. Intermediate caltrop. Kallstroemia parviflora
49. Puncture vine. Tribulus terrestris
59. Stiffstem flax. Linum rigidum var. compactum
52. Stickleaf mentzelia . Mentzelia oligosperma
69. Common mallow . Malva neglecta
68. Narrow-leaved puccoon. Lithospermum incisum
70. Dakota verbena. Verbena bipinnatifida
74. Snowball sand verbena. Abronia fragrans
71. Wild four-o'clock. Mirabilis nyctaginea
75. Narrowleaf four-o'clock . Mirabilis linearis
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