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New species and notes on the southern African genus Ixia L. (Iridaceae)

1985; Elsevier BV; Volume: 51; Issue: 1 Linguagem: Inglês

10.1016/s0254-6299(16)31703-3

1727-9321

Peter Goldblatt, Deirdré Snijman,

Botany and Plant Ecology Studies

The circumscription of Ixia, its subdivision and its relationship to the allied genus Tritonia Ker-Gawler, are discussed. It is suggested that seed characters rather than floral characters could best separate the two genera Two new species from the Worcester district of the southwestern Cape are described. Ixia pumilio Goldbl. & Snijman (subgenus Ixia, section Morph ixia) is restricted to sandy alluvium along the Breede River. Ixia collina Goldbl. & Snijman (subgenus Dichone), a species with unusual and distally flattened filaments, grows on the south-facing slopes of shale hills in karroid vegetation. Die omskrywing van Ixia en die onderverdeling daarvan sowel as die verwantskap met die verwante genus Tritonia Ker-Gawler, word beskryf. Daar word voorgestel dat saad-eerder as blom-karaktereienskappe, die twee genera ten beste onderskei. Twee nuwe spesies uit die Worcester-distrik van die suidweste Kaap word beskryf. Ixia pumilio Goldbl. & Snijman (subgenus Ixia, seksie Morphixia) is beperk tot spoelsand langs die Breederivier. Ixia collina Goldbl. & Snijman (subgenus Dichone), ’n spesie met ongewone geboë en verbrede helmdrade, is van karoo-agtige heuwels.