The Endemic Plants of Chile

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2B A View From The Pajonales Pass Roadside Of The Unpromising Looking Entrance To The Dry Upper Valley Where Cistanthe Floresiorum Was Discover
Región de Atacama, Cuesta Pajonales.
Photo:  © J. Watson
4 A Vigorous Specimen Of F W 11997 Cistanthe Floresiorum Recorded At A Later Visit To The Type Site Pajonales Pass 9 Oct 2010 John Watso
Región de Atacama, Cuesta Pajonales.
Photo:  © J. Watson
5 F W 11997 Cistanthe Floresiorum An Atypical Individual With Ascending Branches Pajonales Pass 9 Oct 2010 John Watson
Región de Atacama, Cuesta Pajonales.
Photo:  © J. Watson
6 F W 11750 Cistanthe Floresiorum Illustrating The Cymose Presentation Pajonales Pass 19 Oct 2008 John Watson
Región de Atacama, Cuesta Pajonales.
Photo:  © J. Watson
7 Frontal View Of An Inflorescence Of An F W 11750 Cistanthe Floresiorum Individual Including An Erect Open Capsule Pajonales Pass 19 Oc
Región de Atacama, Cuesta Pajonales.
Photo:  © J. Watson
8 F W 11750 Cistanthe Floresiorum A Close Up Of The Flowers Pajonales Pass 19 Oct 2008 John Watson
Región de Atacama, Cuesta Pajonales.
Photo:  © J. Watson
  1. Classified in >
  2. genus: Cistanthe >
  3. Family: Montiaceae
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Montiaceae

Cistanthe floresiorum J.M.Watson

Type citation

CHILE. Atacama Region, Huasco Province, Comuna de Vallenar, on S exposure of Cuesta Pajonales shortly below top of pass, 29º08'30"S 70º59'33"W, 1120-1125 m, 19 Oct 2008, leg. A.R. Flores & J.M. Watson, F.& W. 11750! (holotype SGO; isotypes, CONC, herb. Flores & Watson).

Regions

Atacama

Distribution and habitat

Restricted to a single site in the Atacama Region. In an open V-shaped valley with a narrow, dry floor, gently sloping and exposed to the southeast. 'Desierto Florido de las Serranías' (Gajardo 1993), characterised by well-scattered xerophytic mattoral bushes dotted about over rocky and stony terrain.

Conservation status

  • Critically Endangered (Watson (2019a))

Descriptions

  • Watson (2019a)

Key characteristics

Differs principally from other taller, erect to ascending species by a combination of its annual life-form, acute to prolonged, acuminate sepals, subequalling to exceeding the fully-extended petals, its erect mature fruit-bearing pedicels, and glabrous seeds. In addition the sepals are unmarked or, more rarely, weakly black-striated in the basal area only (Watson, 2019).