Callicoma, is a plant genus that contains just one species, Callicoma serratifolia, a tall shrub or small tree which is native to Australia.
 "Callicoma serratifolia" is commonly known as black wattle, derived from the similarity of the flowers to those of Australian "Acacia", which are commonly known as wattles.
 The species has a number of other common names include callicoma, butterwood, silver leaf, silver-leaf butterwood and wild quince.
Phormium is a genus of two plant species in the Asphodelaceae family.
 One species is endemic to New Zealand and the other is native to New Zealand and Norfolk Island.
 The two species are widely known in New Zealand as 'flax' and elsewhere as New Zealand flax or flax lily but are not related to flax, which is native to the region extending from the eastern Mediterranean to India and which was used by humans in 30,000 B.C.
Myrcianthes callicoma is a species of plant in the Myrtaceae family.
 It is found in Argentina and Bolivia.
Phormium colensoi (syn.
 "Phormium cookianum"; mountain flax, lesser New Zealand flax, or wharariki in Māori) is a perennial plant that is native to New Zealand.
 It is less common than the other "Phormium" species, "P. tenax".
 The greenish, yellow or orange flowers are followed by twisted seed pods.
Hoangus venustus, commonly known as the flax ladybird, is a species of ladybird beetle that is native to New Zealand, being found at least in the North Island.
 It can be found on New Zealand flax ("Phormium") and Toetoe (cutty grass), reportedly eating the mealybugs that live there.
 Previously known as "Cassiculus venustus", the valid name of the species is now "Hoangus venustus".

Question: Which has more species, Phormium or Callicoma?
Answer: Phormium