Manual of Riyadh Plants

414 / 476

Part 3: Planning checklists for quick reference
413
A Small, intensively maintained roof gardens
The plants recommended here for roof gardens are less vulnerable
to drought and strong solar radiation, although some may need the
shade of a pergola.
A annual
Calendula officinalis , 0.3-0.6 m, yellow, orange, brown, red.............. 76
Celosia argentea ssp. plumosa , 0.2-1 m, red, orange, yellow,
magenta................................................................................................................................................................................................................................................ 92
Lobelia erinus , 0.1-0.4 m, violet, blue............................................................................................ 192
Portulaca grandiflora , 0.1-0.15 m, yellow, white, pink, red,
violet, purple, yellow............................................................................................................................................................................. 242
Portulaca umbraticola , 0.05-0.15 m, red, centre: yellow...... 243
Reseda muricata , 0.4 m, green, yellow......................................................................................... 255
Zinnia elegans , 0.3-1 m, yellow, orange, red............................................................. 319
A biennial
Asphodelus tenuifolius , 0.15-0.3 m, white............................................................................. 60
A perennial
Aptenia cordifolia , 0.1 m, pink, red............................................................................................................ 54
Canna indica ‘Striata’ , 1.2-1.8 m, orange.................................................................................... 81
Catharanthus roseus , 0.15-0.2 m, pink, white, purple...................... 91
Centaurea ragusina , 0.3-0.4 m, yellow............................................................................................... 93
Cynodon dactylon , 0.03-0.3 m, green, light brown............................ 125
Echinops hussoni , 0.4-0.6 m, blue............................................................................................................. 133
Echinops spinosissimus , 0.7-1 m, white, pastel blue........................ 134
Gazania rigens var. leucolaena , 0.3 m, yellow....................................................... 155
Gazania rigens var. rigens , 0.15-0.3 m, yellow, orange.............. 156
Gazania rigens var. uniflora , 0.2-0.4 m, bright yellow............... 157
Kalanchoe blossfeldiana , 0.15-0.4 m, red, pink, white, orange,
purple, yellow.......................................................................................................................................................................................................................... 176
Kalanchoe daigremontiana , 0.5-1.2 m, bright orange, pastel lilac................ 177
Lampranthus glaucus , 0.2-0.6 m, yellow................................................................................ 181
Lasiurus scindicus , 0.3-1 m, white............................................................................................................ 184
Osteospermum fruticosum , 0.2-0.3 m, white, lilac, dark violet.............. 218
Pelargonium crispum , 0.5-0.9 m, pink........................................................................................ 223
Pennisetum setaceum , 0.9-1.2 m, pastel white................................................... 226
Pennisetum setaceum ‘Cupreum’ , 1.2-1.5 m, pale purple............... 226
Ruellia tuberosa , 0.8 m, lilac, light violet............................................................................. 263
Senecio cineraria , 0.15-1 m, yellow........................................................................................................ 278
Stenotaphrum secundatum , 0.03-0.15 m, light brown.............. 285
Tradescantia pallida , 0.1-0.15 m, pink......................................................................................... 304
Tradescantia spathacea , 0.3-0.4 m, white............................................................................. 305
Verbena tenuisecta , 0.1-0.15 m, purple..................................................................................... 307
Wedelia trilobata , 0.2-0.4 m, bright yellow.................................................................... 313
Zebrina pendula , 0.3 m, violet.............................................................................................................................. 317
A sub-shrub
Agave americana , 0.8-2 m, light green, secondary:
light yellow...................................................................................................................................................................................................... 40
Agave attenuata , 1.2-1.8 m, light green, secondary: light yellow........ 42
Agave sisalana , 1.2-1.8 m, light green, secondary: light yellow............... 43
Aloe arborescens , 1-3 m, red, dark orange.......................................................................... 48
Aloe vera , 0.6-0.9 m, yellow, orange.......................................................................................................... 49
Asparagus densiflorus ‘Sprengeri’ , 0.5-3 m, white, secondary: green...... 59
Carpobrotus acinaciformis , 0.15 m, pink, lilac, light yellow.................. 85
Carpobrotus edulis , 0.15-0.2 m, yellow, pink, light yellow.......................... 86
Cassia italica , 0.5-0.6 m, yellow............................................................................................................................... 88
Convolvulus cneorum , 0.3-0.8 m, white, secondary: pink................. 116
Convolvulus prostratus , 0.1-0.3 m, pastel white, pale pink................. 117
Drosanthemum hispidum , 0.2-0.6 m, pink.................................................................. 130
Lampranthus aureus , 0.15-0.5 m, bright orange........................................... 180
Lantana montevidensis , 0.2-0.3 m, lilac, light blue, violet....................... 183
Lavandula angustifolia , 0.4-1 m, blue, violet............................................................ 187
Lavandula dentata , 0.3-1 m, blue, violet................................................................................. 188
Santolina rosmarinifolia , 0.3-0.7 m, pale yellow........................................... 273
Teucrium oliverianum , 0.4-0.7 m, violet, blue.................................................... 299
A shrub
Atriplex halimus , 0.5-3 m, pale yellow.............................................................................................. 61
Caesalpinia pulcherrima , 3 m, red, orange, yellow.................................... 75