Monday, February 13, 2017

[Botany • 2017] Impatiens bokorensis • A New Species (Balsaminaceae) from southwestern Cambodia


Impatiens bokorensis
S.H.Cho & B.Y.Kim


Abstract
Impatiens bokorensis, a new species of family Balsaminaceae from Phnum Bokor National Park in southwestern Cambodia, is described and illustrated. The species is similar to I. patula, but is readily distinguished by the orbicular-obovate dorsal petal, shorter pedicels and larger seeds.

Keywords: Phnum Bokor National Park, Endemic species, Impatiens, Cambodia


Taxonomy

Impatiens bokorensis S.H.Cho & B.Y.Kim, sp. nov.

Type: CAMBODIA. Kampot Province, Phnum Bokor National Park, sandstone tables in evergreen forest margin, 10°38'20.8"N, 104°00'16.0"E, a.s.l. 1,050 m, 24 August 2015, with flowers, Cho S.H, Kim B.Y., Park H.S., Chhang Phourin CB-3112 (holotype HHU!, isotypes KB!, KRIB!, RUPP!).

Diagnosis: Impatiens bokorensis is most similar to the Thailand endemic species I. patula Craib in habit but is readily distinguished from the latter by the orbicular-obovate dorsal petal, shorter pedicels and larger seeds (Table 1).

Figure 2. A–E Impatiens bokorensis
 A Habit BC Flower D strigose-ciliate at leaf base E Capsule.

 Photos by Seong-Hyun Cho. 


Distribution and habitat: Impatiens bokorensis grows on sandstone tables in evergreen forest margins at 1,050 m a.s.l.. Endemic to southwestern Cambodia, I. bokorensis is at present known only in the type locality.


    Seong-Hyun Cho, Bo-Yun Kim, Han-Sol Park, Chhang Phourin and Young-Dong Kim. 2017. Impatiens bokorensis (Balsaminaceae), A New Species from Cambodia.   PhytoKeys. 77: 33-39. DOI: 10.3897/phytokeys.77.11345

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