Question: Which genus has more species, Cibotium or Crowea?
Context: Cibotium schiedei, common name Mexican tree fern, is a species of tree fern, of the genus "Cibotium". Crowea is a genus of small evergreen shrubs in the plant family Rutaceae sometimes known as Waxflowers.  There are three species and many subspecies and cultivars, all of which are popular as ornamentals because of their abundant, attractive flowers which often occur during autumn and winter.  "Crowea" species are all endemic to Australia, where they occur in Victoria, New South Wales and Western Australia. Cibotium cumingii is a species of tree fern, of the genus "Cibotium".  It is named after the 19th century collector, Hugh Cuming.  Its apex and young fronds are covered with reddish hairs.  It can be found growing in open forest or in hilly areas in the Philippines and in Taiwan. Cibotium (from the Greek "kibootion", meaning chest or box) is a genus of 11 species of tropical tree fern—subject to much confusion and revision—distributed fairly narrowly in Hawaiʻ i (four species, plus a hybrid, collectively known as hāpuʻ u), Southeast Asia (five species), and the cloud forests of Central America and Mexico (two species).  Some of the species currently listed in the literature seem to be synonyms or local-variant subspecies. " Cibotium glaucum", from Hawaiʻ i, is the most frequently encountered "Cibotium" species in the horticultural trade, together with its sibling species "Cibotium chamissoi" and the potentially huge "Cibotium menziesii".  The remaining Hawaiian "Cibotium", "C. nealiae", is a 1 m dwarf variety, restricted to the island of Kauaʻ i that is never seen in the horticultural trade.  Precise identification of "Cibotium" species is difficult, although all have shiny and rather waxy fronds when viewed from above, with varying degrees of powdery-pale blush when seen from underneath.  The natural habitat of "Cibotium" is among the dripping trees and stream gullies of the rainforests on Hawaiʻ i's windward volcanic slopes. The tree ferns are the ferns that grow with a trunk elevating the fronds above ground level.  Most tree ferns are members of the "core tree ferns", belonging to the families Dicksoniaceae, Metaxyaceae, and Cibotiaceae in the order Cyatheales.  In addition to those families, many ferns in other groups may be considered tree ferns, such as several ferns in the family Osmundaceae, which can achieve short trunks under a metre tall, and particularly ferns in the genus "Cibotium", which can grow ten metres tall.  Fern species with short trunks in the genera "Blechnum, Calochleana, Cnemedaria, Culcita" (Europe's only tree fern), "Cystodium, Leptopteris, Lophosoria, Sadleria, Thyrsopteris" and "Todea" could also be considered tree ferns in a liberal interpretation of the term. The Dicksoniaceae is a family of tropical, subtropical and warm temperate ferns. Most of the 5-6 genera in the family are terrestrial ferns or have very short trunks compared to tree ferns of the family Cyatheaceae.  However, some of the larger species can reach several metres in height.  A number of others are epiphytes.  They are found mostly in tropical regions in the Southern Hemisphere, as far south as southern New Zealand.  Larger tree ferns in the genus "Cibotium" were formerly included in Dicksoniaceae, but are now segregated as the family Cibotiaceae.
Answer: Cibotium