Question: Cydista and Pachystegia, are related to what?

full_context: Document 1: Pachystachys: Pachystachys is a genus of 12 species of flowering plants in the family Acanthaceae, native to rainforest in the Caribbean and Central and South America. They are evergreen perennials and shrubs bearing prominent terminal spikes of flowers with brightly coloured bracts.
Document 2: Cydista: Cydista is a genus that consists of more than twenty species of lowland, showy, evergreen, ornamental shrubs and woody vines, ranging from central and southern Mexico to Paraguay and eastern Brazil. The genus is characterized by the lack of a nectariferous disk and is associated with the multiple-bang flowering syndrome. All species are lianas with clusters of funnelform flowers, bloomig twice a year in spring and fall. The flowers start of purple and change to a lighter shade of lavender with age, then fading to almost white, followed by linear oblong fruits and winged seeds. The plants are multi-stemmed with opposite, oval, glossy, dark-green leaves and 2 leaflets, and climb by tendrils arise from the leaf axils. Leaves smell like garlic when crushed.
Document 3: Campsis × tagliabuana: Campsis" × "tagliabuana (Madame Galen) is a mid-19th-century hybrid between "Campsis radicans" (American trumpet vine) and "Campsis grandiflora" (Chinese trumpet vine). It produces trumpet-shaped, orange to red flowers up to 3 in long that appear in loose clusters of 6 to 12. It is a woody, clinging, perennial vine that attaches itself to structures and climbs vigorously with aerial roots like those of ivy. It bears dark-green deciduous leaves, 8 - long. Its flowers are very attractive to bees, butterflies and birds. Like its parents it is hardy but in cooler temperate regions requires the shelter of a sunny wall to produce its spectacular flowers in abundance.
Document 4: Cybistax: Cybistax is a genus containing a single species, Cybistax antisyphilitica (Mart.) Mart., a flowering and economic timber tree from tropical Central and South America. These semi-deciduous plants have greyish green, opposite, palmately compounded leaves and close-grained, light-colored wood good for furniture. In early spring, the plants bear showy clusters of bright yellow, funnel-shaped flowers 2-2.5 cm wide at branch ends. Pods are 25–50 cm long, straight, pendulous and brown with thin, flat seeds inside. The seeds have papery wings.
Document 5: Stachyurus: Stachyurus is the only genus in the flowering plant family Stachyuraceae, native to the Himalayas and eastern Asia. They are deciduous shrubs or small trees with pendent racemes of 4-petalled flowers which appear on the bare branches before the leaves. The plants have leaves with serrate margins. Stachyuraceae contains a single genus with eight species.
Document 6: Pachystegia: Pachystegia is a genus of shrubs in the daisy family described as a genus in 1925.
Document 7: Clytostoma: Clytostoma was a genus of woody-stemmed vines from tropical America, native to Argentina and the southern part of Brazil. It is now considered a synonym of "Bignonia". The botanical name comes from the Greek, "klytos" means splendid or beauteous, and "stoma" means mouth; alluding to the beautiful flowers. It is closely related to "Bignonia", from which it differs chiefly in its simple slender tendrils, the short disk, and that it has a habit of clambering over adjacent foliage using tendrils to hang on tight. The bright glossy green leaves are lobed and divided with 2 leaflets, about 3in (7.6cm) long and 1.5in (3.8cm) wide. They are arranged opposite in pairs and tendrils arise at the ends of the leaf stalks. In late spring, the spectacular 1.5in (3.8cm) trumpet flowers are borne terminally or along the branches. The flowers are pale lavender and delicately detailed with dark violet and purple veins. Flowers are followed by large prickly seed pods. This evergreen ornamental plant easily reaches to 16 feet and is a carefree grower. It has only recently been moved out of the genus "Pandorea".
Document 8: Brachyglottis: Brachyglottis is a genus of flowering plants in the aster family, Asteraceae. The genus was erected on November 29, 1775, by Johann Reinhold Forster and Georg Forster. The name was derived from the Greek "brachus" ("short")
Document 9: Chlidanthus: Chlidanthus is a genus that consists of 10 species of tender bulbs from tropical South America, mostly natives to the Andes. The botanical name comes from the Greek, meaning "delicate flower". The plants have large spherical bulbs with gray-green, strap-shaped leaves 30cm long arising from the base. In late spring to early summer, clusters of 3-4 large, strong citrus-scented fragrant, funnel-shaped flowers 10-13cm long held terminally on stalks 25cm high, colored in yellow, pink or red.
Document 10: Cyananthus: Cyananthus is a genus that consists of about 30 species of annual or mostly perennial herbs from high mountains of Central and East Asia. They are little Himalayan plants not higher than 4in. The name comes from the "Greek" for blue flowers. Leaves are usually small and simple, sometimes narrowing to base, tooth-lobed at summit. In August to September, the plants bear showy of bright purplish-blue, yellow or white, funnel to bell-shaped, 5-lobed flowers 1in in diameter with stamens free from the corolla and hairy throat. The flowers are borne singly on stalks. They always lose the aerial parts during the coldest months, and as spring begins, stems and leaves quickly start to reproduce.
Document 11: Aganosma cymosa: Aganosma cymosa is a liana that can grow up to 10 metres in length, pale brownish tomentose. Leaf-stalks are 1-2 cm, leaf blade broadly ovate or orbicular, 5-16 x 4-12 cm, base rounded or obtuse, apex acuminate or obtuse, rarely retuse, lateral veins 8-10 pairs. Flowers are borne in many-flowered clusters at branch ends, which are carried on stalks up to 6 cm. Bracts and bracteoles are very narrowly elliptic, 0.9-1.1 cm. Flower-stalks are about 5 mm. Calyx with several glands inside margin of sepals; sepals very narrowly elliptic, 0.9-1.1 cm, pubescent on both surfaces. Flowers are white, minutely tomentose outside, glabrous at throat; tube shorter than sepals, 6-7 mm; lobes oblong, as long as tube. Disc longer than ovary. Ovary pubescent at apex. Follicles 2, cylindric, to 30 X 0.8-1.2 cm, yellow hirsute. Seeds oblong, 1-2 cm X ca. 5 mm, coma 2-4.5 cm.It is native to China (Guangxi, Yunnan), Bangladesh, India, Sri Lanka, and Indochina (Cambodia, Laos, Thailand, Vietnam).
Document 12: Pelargonium: Pelargonium is a genus of flowering plants which includes about 200 species of perennials, succulents, and shrubs, commonly known as geraniums (in the United States also storksbills). Confusingly, "Geranium" is the botanical name (and also common name) of a separate genus of related plants often called cranesbills. Both genera belong to the family Geraniaceae. Linnaeus originally included all the species in one genus, "Geranium", and they were later separated into two genera by Charles L’Héritier in 1789.
Document 13: Cyrtandra (plant): Cyrtandra is a genus of flowering plants containing about 600 species, with more being discovered often, and is thus the largest genus in the family Gesneriaceae. These plants are native to Southeast Asia, Australia, and the Pacific Islands, with the centre of diversity in Southeast Asia and the Malesian region. The genus is common, but many species within it are very rare, localized, endangered endemic plants. The species can be difficult to identify because they are highly polymorphic and because they readily hybridize with each other. The plants may be small herbs, vines, shrubs, epiphytes, or trees. The genus is characterized in part by having two stamens, and most species have white flowers, with a few red-, orange-, yellow- and pink-flowered species known. Almost all species live in rainforest habitats.
Document 14: Pachysandra: Pachysandra is a genus of five species of evergreen perennials or subshrubs, belonging to the boxwood family Buxaceae. The species are native to eastern Asia and southeast North America, some reaching a height of 20 - , with only weakly woody stems. The leaves are alternate, leathery, with an entirely too coarsely toothed margin, and are typically 5 - long. The small uni-sexual blooms are greenish-white and produced in late spring or early summer.
Document 15: Polystachya: Polystachya, abbreviated Pol in horticultural trade, and commonly known as yellowspike orchid, is a flowering plant genus in the orchid family (Orchidaceae). This rather distinctive genus was described by William Jackson Hooker in 1824 and is the type genus of the subtribe Polystachyinae. It contains about 100 species widespread across much of the tropical parts of the globe.
ground_truth: shrubs