Delissea parviflora
Genus: Delissea sect. Rhytidosperma (shrubby with small flowers).
Status: Extinct.
Range: Hawai'i, Kohala to Mauna Kea; mesic forests; 1375-1830m.
Growth form: Shrub.
Lammers (1990 in Wagner et al.) speculated that this species, known only from two specimens, was a juvenile version of Delissea fallax. The distinguishing characteristic is the laciniate leaf-margin of D. parviflora, but leaf dimorphism is known in other Hawaiian lobeliads so this is not conclusive. In his 2005 monograph, Lammers lists a larger set of differentiating characters and maintains them as distinct species. But, he laments the paucity of specimens: three for D. fallax and two for D. parviflora.
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