Fouquieria is a genus of 11 species of desert plants, the sole genus in the family Fouquieriaceae.
 The genus includes the ocotillo ("F. splendens") and the boojum tree or cirio ("F. columnaris").
 They have semisucculent stems with thinner spikes projecting from them, with leaves on the bases spikes.
 They are unrelated to cacti and do not look much like them; their stems are proportionately thinner than cactus stems and their leaves are larger.
is a genus of about 300 species within the buttercup family Ranunculaceae.
 Their garden hybrids have been popular among gardeners, beginning with "Clematis" × "jackmanii", a garden standby since 1862; more hybrid cultivars are being produced constantly.
 They are mainly of Chinese and Japanese origin.
 Most species are known as clematis in English, while some are also known as traveller's joy, a name invented for the sole British native, "C. vitalba", by the herbalist John Gerard; virgin's bower for "C. viticella"; old man's beard, applied to several with prominent seedheads; leather flower for those with fleshy petals; or vase vine for the North American "Clematis viorna".
Over 70 species and cultivars of clematis currently (2016) possess the Royal Horticultural Society's Award of Garden Merit, reflecting this plant's continued popularity in gardens in the United Kingdom.
 "Clematis" is a genus of woody based perennials, mostly climbers with a twining habit, though some are grown as groundcover or as herbaceous plants.
 They can be evergreen or deciduous.
 They bear flowers in all shades except black, pure blue, pure red and orange.
 The flowers are often large and showy.
 They can be single or double, fragrant or unscented, compact or vigorous, in a wide range of shapes and sizes.
 The flowering period varies from early spring to late summer.
 Many spring-flowering cultivars produce a second flush of blooms after the main display has finished, and many have attractive silky seed-heads prolonging the period of interest.
 Clematis can be grown against walls, fences, over pergolas and obelisks, or through other shrubs and trees.

Question: Which genus has more species, Fouquieria or Clematis?
Answer: Clematis