1. Setchellanthaceae Iltis

    1. This family is accepted.

[NTK]

Souza, V.C. (2013). Neotropical Setchellanthaceae.

Morphology
Description

Shrub ; indumentum with T-shaped hairs.  Leaves spirally arranged, simple , without stipules.  Flowers axillary , solitary, actinomorphic , bisexual , showy; sepals (5-)6(-7), enclosing the flower bud , splitting irregularly at anthesis; petals (5-)6(-7), free , imbricate , clawed, blue to lilac; stamens many, centrifugal, disposed in 5-7 groups on an elongated axis , anthers bithecate, introrse, opening by longitudinal slits; nectary absent; ovary syncarpous with 3 carpels, 3-locular, with a short gynophore , ovules 10-14 per carpel , with axile placentation, style short.  Fruits elongate septifragal capsules.

Distribution
Distribution in the Neotropics
  • The family is endemic to Mexican desert, only in the Chihuahuan Desert and in the Tehuacán-Cuicatlán Valley.
Diagnostic
Distinguishing characters (always present)
  • Indumentum with T-shaped hairs.
  • Leaves spirally arranged, simple, without stipules.
  • Flowers axillary, solitary.
  • Sepals closed in bud, splitting irregularly at anthesis.
  • Stamens many, disposed in 5-7 groups on an elongated axis.
Key differences from similar families
  • The Setchellanthus was previously included in Capparaceae which is polymorphic family distinguished from Setchellanthaceae especially by the sepals and petals usually 4 (vs. (5-)6(-7)) and carpels usually 2 (vs. 3).
Other important characters
  • Xeromorphic shrubs.
  • Smelling odour.
General Description
Status
  • The family is endemic to Mexican desert, only in the Chihuahuan Desert and in the Tehuacán-Cuicatlán Valley.
Number of genera
  • One: Setchellanthus Brandegee
Notes on delimitation
  • Setchellanthaceae is a monotypic family, recently described (Iltis, 1999), previously included in Capparaceae, includes the species Setchellanthuscaeruleus Brandegee.
  • The family belong to Brassicales, as a sister group to a large clade, which includes most of families of this order (APG III, Hernández-Hernández et al. 2013).
Literature
Important literature

Hernández-Hernández, T., Colorado, W.B. & Sosa, V. 2013.  Molecular evidence for the origin and evolutionary history of the rare American desert monotypic family Setchellathaceae.  Org. Divers. Evol. DOI 10.1007/s13127-013-0136-4.Iltis, H.H. 1999.  Setchellanthaceae (Capparales), a New Family for a Relictual, Glucosinolate-Producing Endemic of the Mexican Deserts. Taxon 48(2): 257-275.Kubitzki, K. 2002. Setchellanthaceae. In K. Kubitzki, & C. Bayer (eds.). The Families and Genera of Vascular Plants, V: Dicotyledons; Malvales, Capparales, and non-betalain Caryophyllales, pp. 353-354. Springer-Verlag, Berlin.

Images

Setchellanthaceae Iltis appears in other Kew resources:

First published in Taxon 48(2): 260 (1999). (1999)

Accepted by

  • APG IV (2016) http://dx.doi.org/10.1111/boj.12385

Sources

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Neotropikey
Milliken, W., Klitgard, B. and Baracat, A. (2009 onwards), Neotropikey - Interactive key and information resources for flowering plants of the Neotropics.
http://creativecommons.org/licenses/by/3.0