Herbs perennial, cormous. Corm covered with a tunic. Stem erect, leafy. Leaves several, scattered, sessile, linear. Flowers solitary or several in a terminal corymb, small; bracts leaflike; pedicels long. Tepals 6, free, spreading, rather narrow, clawed, usually caducous. Stamens 6, inserted at base of tepals; filaments short, slightly flat; anthers versatile, extrorse. Ovary 3-loculed, ovoid to oblong; ovules many per locule. Style short, apically 3-lobed, adaxially stigmatic. Fruit a loculicidal capsule. Seeds many, subglobose; testa brown, thin.
About ten species: Africa (including Madagascar), tropical Asia, Australia, Pacific Islands (New Zealand) ; one species in China.[1]
There are approximately 35 species and subspecies in this genus: I. abyssinica · I. altier · I. altior · I. bechuanica · I. boinensis · I. brasiliana (Giant Coquina) · I. brasiliensis · I. caricina · I. cuneatus · I. dinteri · I. flexuosa · I. guineensis · I. indica · I. junodii · I. lacunosa · I. ledermanii · I. ledermannii · I. magnifica · I. mysorensis · I. novae-zelandiae · I. oliveri · I. pallida · I. pauciflora · I. racemosa · I. ramosissima · I. robusta · I. sahyadrica · I. schlechteri · I. socotrana · I. somaliensis · I. stellata · I. stenotepala · I. strumosa · I. sudanica · I. tumida
There are approximately 682 species and subspecies in this genus. Here are just 100 of them: P. actoni von · P. acuminatus · P. acutiplicatus · P. aduncus · P. aeguisulcatus · P. aequatorialis · P. aequisulcatus · P. aequivalvis · P. afrobenedictus · P. agronomica · P. aknerianus · P. aktinos · P. alabamensis · P. alba · P. albicans · P. albicans naganumanus · P. albolineata · P. albolineatus · P. alcocki · P. aletes · P. alockamanensis · P. alpha · P. alternilineatus · P. amenensis · P. amuricus · P. anatipes · P. andamanense · P. andamanicus · P. andersoni · P. andersoni clemonensis · P. andersoni gonicostus · P. andersoni subandersoni · P. annuatus · P. antiguensis · P. antillarum · P. antonii · P. aratus · P. archiacianus · P. archon · P. arcuatus · P. argillensis · P. arradians · P. arzierensis · P. ashleyi · P. asper · P. aspera · P. asperimus · P. asperrimus · P. asperrinus · P. asperulatus · P. atiauritus · P. auratus · P. auriculatum · P. australis · P. awajiensis · P. aztecus · P. balloti · P. bellula · P. bellulus · P. bellus · P. benedicti · P. benedictus · P. bernardi · P. besseri · P. beudanti · P. biddleana · P. bielzianus · P. bifidus · P. bifrons · P. bilineatus · P. bipartitus · P. bosei · P. bowdenensis · P. bowersi · P. branneri · P. bruei · P. brummeli · P. buchivacoanus · P. burdigalensis · P. burnsii · P. byoritzuensis · P. byramensis · P. cailliaudi · P. caimitica · P. californicus · P. calkinsi · P. callimorphus · P. calvatus · P. canyinus · P. capensis · P. carboniferum · P. caribeus · P. carinatus · P. caroli · P. carrizoensis · P. carrizonensis · P. cartieri · P. caruscans · P. cataractes · P. catarates
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