Several genera afford ornamental plants; such are Lonicera, erect shrubs or twiners with long-tubed white, yellow or red flowers; Symphoricarpus, a North American shrub, with small whitish pendulous flowers and white berries; Diervilla (also known as Weigelia), and Viburnum, including V.
Haraz; in the Wadi Tubed west of Uden; in Hajaria on the slopes of J.
Those with long - tubed flowers comprise the genera Melocactus, Mammillaria, Echinocactus, Cereus, Pilocereus, Echinopsis, Phyllocactus, Epiphyllum, &c.; while those with short-tubed flowers are Rhipsalis, Opuntia, Peireskia, and one or two of minor importance.
It is a very heterogeneous group, being fleshy-stemmed with a woody axis, the branches being angular, winged, flattened or cylindrical, and the flowers small, short-tubed, succeeded by small, round, peashaped berries.
Speciosum (lancifolium) and also the chaste-flowering trumpet-tubed L.
Other distinct kinds are P. campanulatus, 12 ft., pale rose, of bushy habit; P. humilis, 9 in., bright blue; P. speciosus, cyananthus and Jaffrayanus, 2 to 3 ft., all bright blue; P. barbatus, 3 to 4 ft., scarlet, in long terminal panicles; P. Murrayanus, 6 ft., with scarlet flowers and connate leaves; and P. Palmeri, 3 to 4 ft., with large, wide-tubed, rose-coloured flowers.