Shrubby clumps, 3-4ft. high. Pads turn purple after winter cold temperatures, or in full sun. Variable spines – some have a few long spines, others are mostly glochids.
Soil
Opuntia santa-rita “Goldie Rita”
Small blue-grey pads, turning turquoise in winter. Jet-black spines. Golden flowers in spring. Moderately slow grower.
Opuntia santa-rita “Tubac”
Large round pads covered in glochids, blue-grey in summer turn purple in cold. Yellow flowers.
Opuntia stenopetala
Shrubby prickly pear to 5′; medium red spines with many orange glochids
Opuntia streptacantha
Shrubby prickly pear to 5ft.; delicious fruit
Opuntia sulphurea
3ft tall, can spread to 6ft wide, low growing spiny Prickly-Pear cactus. Can grow in clay soils. Spines are dense and hardened. Yellow flowers spring through summer.
Opuntia tuna-blanca
Tall, fast growing prickly pear; delicious fruit (tunas) creamy-white colored.
Opuntia undulata
Tall prickly pear to 10′, trunk to 12″; low-spine, edible pads/fruit
Opuntia violacea
O. macrocentra v. minor
Purple pads, low spreading, a few long black spines; Populations vary by location.
Opuntia Walk in Beauty “Apricot Glory”
Nearly spineless thick pads. Apricot to pink flowers are abundant in spring. Sprawls wide. Very cold hardy, reliable bloomer.
Opuntia x rooneyi
O. aureispina x O. macrocentra
Large bluish pads, long red spines
Opuntia x Walk In Beauty™ “Watermelon Man”
Very low water, can handle high heat and is very cold hardy if kept dry. Warm pink flowers, May thru June. Loads of small glochids, very few spines. Will get 1ft tall x 4ft wide.
Opuntia “Pinta Rita”
O. santa-rita “Pinta Rita”
Intense purple and turquiose pads, purple-red flowers.
Orbea deflersiana
Sprawling cushions of short stems to 4″ tall. Carrion flowers.
Orbea distincta
Sprawling segmented stems with protruding teeth. Large burgundy and yellow carrion flowers.
Orbea lepida
Stapelia lepida
Stems to 6″, starfish shaped carrion flowers to 3″
Orbea lutea ssp. vaga
6″ stems and stunning variable starfish shaped carrion flowers to 4″
Orbea schweinfurthii
Sprawling stems, many tiny carrion flowers.
Orbea variegata
Stapelia variegata
Variable, stems to 12″; speckled carrion flowers to 6″
Orbeanthus hardyi
Orbea hardyi
Low, creeping with trailing speckled stems. Grayish-green with mottled purple. Starfish-shaped carrion flowers with bowl-shaped center. Protect from frost.
Oreocereus celsianus
Tree cactus to 12ft. tall covered with long white hairs. Branches from the base. low growing.
Oreocereus doelzianus var. sericatus
Morawetzia sericata
Exceptionally attractive white-furred, broze-spined cactus from high altitudes where the fur protects it from scorching sunlight and frosts. Slow, but will clump with age, carmine colored tubular flowers.
Oreocereus ritteri
Fog hardy, slow basally clumping to 5ft x 10ft wide
Oreocereus trollii
Andean, fog hardy. Exceptionally attractive white-furred and bronze-spined cactus from high altitudes where the hairs will protect it from UV and frosts. Slowly clumping to 30″t. Red flowers.
Ornithogalum caudatum
Winter-growing bulb, 4″ caudex, w/strappy leaves to 3ft.
Ornithogalum dubium
Beautiful spring bulb in the Scilloideae subfamily. Summer dormant. Has large sprays of orange or yellow flowers in the spring, strappy leaves through the winter. Frost tender. Can be unplanted for winter, replanted in spring. Keep dry when dormant.
Ornithogalum fimbriatum
Beautiful spring bulb in the Scilloideae subfamily. Summer dormant. Has initial low sprays of flowers in late winter, and a 2nd tall bloom stalk with large sprays of white flowers in the spring, strappy leaves through the winter. Frost tender. Can be unplanted for winter, replanted in spring. Keep dry when dormant.
Ornithogalum saundersiae
Hyacinth bulb, 5ft. stalks w/white flowers, black centers Late winter blooming.
Orostachys iwarenge
Groundcover, lots of plantlets, pyramidal bloom stalks.
Orostachys japonica
Unusual rosette-forming succulent with pyramidal bloom stalks. Large clusters. Monocarpic, will bloom in the 2nd or 3rd year.