Trailing four-o’clock 67 Tree-cholla 94 Tree-tobacco 29 Tree-yucca 18 Tribulus 38 Trompillo 87 Tuna 59 U Unicornplant 63 V Varnishbush 47 VIOLET flowers 77-82 W Wait-a-minute 33 Walkingstick cholla 94 Waterleaf family 77, 91 Watermotie 25 Waterwally 25 Waterwillow 25 Wavy-thistle 95 Western-jimson 11 West Indian boerhaavia 92 Whisker cactus 74 WHITE flowers 9-18 Wild-delphinium 101 Wild-hazel 104 Wild-heliotrope 77, 88 Wild-lilac 79 Wild morningglory 99 Wild-potato 87 Wild rhubarb 103 Wild-zinnia 32 Windmills 67 Wislizenia 37, 41 Wolfberry 78 Woolly-marigold 54 Woolly-loco 86 Woolly plantain 25