MEXICAN NIGHT BLOOMING CEREUS; REINA DE NOCHE; SERPENT CACTUS (_Cereus serpentinus_) _Frontispiece_ PAGE SENITA, ZINA, OR SINA (_Cereus Schottii_) 4 NIGHT BLOOMING CEREUS; GODDESS OF THE NIGHT; LA REINA DE NOCHE; THE QUEEN OF NIGHT (_Cereus Greggii_) _Facing_ 8 SAHUARO OR GIANT CACTUS (_Cereus giganteus_); AND PALO VERDE ” 9 SHORT SPINED STRAWBERRY CACTUS (_Echinocereus Bonkeræ_) ” 28 HORNED TOAD CACTUS (_Mammillaria Mainæ_) ” 40 SLENDER PINCUSHION CACTUS (_Mammillaria fasciculata_) ” 40 SUNSET CACTUS (_Mammillaria Grahamii_) ” 41 BENT SPINE PINCUSHION (_Coryphantha recurvata_) ” 41 GOLDEN SPINED STRAWBERRY CACTUS (_Echinocereus chrysocentrus_) ” 66 TURK’S HEAD (_Echinocactus horizonthalonius_) ” 66 TRAVELER’S FRIEND; CANDY CACTUS; TRAVELER’S COMPASS (_Echinocactus Covillei_) ” 66 DESERT STRAWBERRIES; FENDLER’S HEDGEHOG CACTUS (_Echinocereus Fendleri_) ” 67 INDIAN STRAWBERRY CACTUS; ENGELMANN’S HEDGEHOG CACTUS (_Echinocereus Engelmannii_) ” 67 SHORT SPINED STRAWBERRY CACTUS (Echinocereus Bonkeræ) ” 72 SALMON FLOWERED HEDGEHOG CACTUS (_Echinocereus Leeanus_) ” 72 CREAM PINCUSHION CACTUS (_Mammillaria Johnstonii_) ” 73 SHOWY PINCUSHION CACTUS (_Coryphantha aggregata_) ” 73 SNOWBALL PINCUSHION (_Mammillaria Oliviæ_) ” 73 CALIFORNIA PINCUSHION (_Mammillaria tetrancistera_) ” 73 RAINBOW CACTUS (_Echinocereus rigidissimus_) ” 84 PAPAGO FRUIT CACTUS (_Opuntia Blakeana_) 91 DELICATE PRICKLY PEAR (_Opuntia delicata_) 92 WHIPPLE’S CHOLLA (_Opuntia Whipplei_) 93 PURPLE PRICKLY PEAR (_Opuntia santa rita_) 93 SMOOTH PRICKLY PEAR (_Opuntia laevis_) 95 FOOTHILL PRICKLY PEAR (_Opuntia Toumeyi_) 96 DISCUS PRICKLY PEAR (_Opuntia discata_) 98 ENGELMANN’S PRICKLY PEAR (_Opuntia Engelmannii_) 99 BEAVER TAIL (_Opuntia basilaris_) ” 100 FLAPJACK PRICKLY PEAR (_Opuntia chlorotica_) ” 100 PORCUPINE PRICKLY PEAR (_Opuntia hystricina_) ” 101 TEDDY BEAR CACTUS (_Opuntia Bigelovii_) ” 101 GOLDEN PRICKLY PEAR (_Opuntia Covillei_) 102 PORCUPINE PRICKLY PEAR (_Opuntia hystricina_) 105 LONG SPINED PRICKLY PEAR (_Opuntia macrocentra_) 105