122 



Index 



P. Senega, 62. 



P. serpens, 19, 21, 37, 116. 



P. 8t tacea, 101. 



P. stlihm, SO. 



P. spathulata, 79, 80, 117. 



P. spergulai folia, 112. 



P. sphaerocephala, 79, 82. 



P. sphaerospora, 60, 61. 



P. squamifolia, 79, 88, 117. 



P. steUera, 94. 



P. stipitata, 11, 15, 1G, 116. 



P. stricta, 54. 



P. strigulosa, 112. 



P. Bubalata, 79, 84, 110, 111, 117. 



P. tehuacana, 58, 117. 



P. tenella, 112. 



P. tenuiloba, 23, 36. 



P. texensis, 70, 74. 



P. timoutou, 89, 90, 117. 



P. tonsa, 60, 63, 117. 



P. Torreyi, 86. 



P. trichoptera, 22, 39, 50. 



P. trichosperma, 96, 112. 



P. turgida, 79, 82, 111, 117. 



P. Tweedyi, 70, 76. 



P. uncinata, 91, 92. 



P. variabilis, 92, 95, 96. 



P. variabilis f. leucanthema, 96, 117. 



P. variabilis f. typica, 96. 



P. velata, 37, 41, 116. 



P. velutina, 112. 



P. verlicillata, 112. 



P. verlicillata var. aparinoides, 83. 



P. violacea, 35, 69. 



P. virgata, 12. 



P. viridis, 103, 109. 



P. Fogtfw, 83. 



P. vulgaris, 112. 



P. Watsoni, 102, 105, 118. 



P. Wightiana, 79, 87, 117. 



P. Wrightii Chod. 63, 65. 



P. Wrightii Gray, 106. 



P. Xanthi, 21. 



P. Xanti, 19, 21. 



P. zacatecana, 23, 26. 



Securidaca volubilis, 1, 14, 15, 111. 



Viola punctata, 55. 



