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Trematolobelia: Seed Dispersal; Anatomy of Fruit and Seeds

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Title:Trematolobelia: Seed Dispersal; Anatomy of Fruit and Seeds
Authors:Carlquist, Sherwin
Date Issued:Jan 1962
Publisher:University of Hawai'i Press
Citation:Carlquist S. 1962. Trematolobelia: seed dispersal; anatomy of fruit and seeds. Pac Sci 16(1): 126-134.
Abstract:The endemic Hawaiian genus Trematolobelia
(Lobeliaceae, or Campanulaceae, subfamily
Lobelioideae) was erected on the basis of its
distinctive fruit. This fruit has a seed-dispersal
mechanism unique in the family. Assertions
have been made by some workers that holes in
the fruit wall are the work of insects, and are not
related to the dispersal mechanism. This contention
has been adequately disproved by other
investigators, but, in fact, the precise nature of
the dispersal mechanism and the anatomical
structure responsible for its action have never
been adequately described. In addition, the present
study reveals the potential taxonomic use
of capsular anatomy, a feature of importance
because various authors recognize one, two, or
three species in the genus. These species are
based largely on floral features or foliar characteristics,
and not on those of the fruit. Unusually
good material of Trematolobelia collected by
the writer during the summer of 1958 provides
a sufficient basis for presenting the features
mentioned above in some detail.
Appears in Collections: Pacific Science Volume 16, Number 1, 1962

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