1. Francoaceae A.Juss.

    1. This family is accepted.

[FWTA]

Melianthaceae, Hutchinson and Dalziel. Flora of West Tropical Africa 1:2. 1958

Habit
hrubs or small trees
Leaves
Leaves alternate, pinnate, stipulate; stipules intrapetiolar, often large
Flowers
Flowers hermaphrodite, rarely unisexual, racemose, zygomorphic
Calyx
Calyx of 5 unequal segments, imbricate
Corolla
Petals 5, free, subperigynous, clawed, unequal
Nectaries
Disk unilateral or annular, lining the inside of the calyx
Androecium
Stamens 4–6, inserted within the disk, free or variously connate, often declinate; anthers 2-celled, opening lengthwise
Gynoecium
Ovary 4–5-celled, superior; style central, dentate or truncate; ovules 1–4 in each cell, axile
Fruits
Fruit a papery or woody capsule, loculicidally 4–5-valved or opening only at the apex
Seeds
Seeds with copious endosperm and straight embryo
[FTEA]

Melianthaceae, B. Verdcourt (East African Herbarium). Flora of Tropical East Africa. 1958

Habit
Shrubs or trees
Leaves
Leaves alternate, pinnate; stipules present and often large
Flowers
Flowers hermaphrodite or often functionally unisexual, more or less irregular, in conspicuous racemes
Calyx
Calyx-segments 4–5, somewhat unequal, imbricate
Corolla
Petals 5, free, unequal, clawed
Nectaries
Disc pentagonal-annular or variously unilateral
Androecium
Stamens 4–6, free or somewhat connate
Gynoecium
Style simple; stigma small or capitate Ovary superior, 4–5–locular Ovules axile, 1–4 per loculus
Fruits
Fruit a papery or woody capsule
Seeds
Seeds large with copious endosperm
[FZ]

Melianthaceae, F. White. Flora Zambesiaca 2:2. 1966

Habit
Trees or shrubs
Indumentum
Indumentum of simple hairs
Leaves
Leaves alternate, imparipinnate or 3-foliolate
Stipules
Stipules present, usually large, either in pairs at the base of the petiole or fused and intrapetiolar (Bersama)
Inflorescences
Inflorescence of conspicuous terminal or axillary racemes
Flowers
Flowers bisexual in appearance but often unisexual and then apparently dioecious or polygamous, slightly to markedly zygomorphic, usually 4–5-merous; sepals and petals dissimilar
Calyx
Sepals 4–5, shorter or longer than the petals, united at the base, with lobes imbricate
Corolla
Petals 4–5, free, imbricate, unequal, unguiculate
Nectaries
Disk extrastaminal, annular-pentagonal or variously unilateral
Androecium
Stamens 4–5(8), free or connate at the base; anthers 2-thecous, dehiscing longitudinally
Gynoecium
Ovary superior, 4–5-locular, with basal or axile placentation; ovules 1–4 per loculus; style 1, stigma capitate
Fruits
Fruit a papery or woody loculicidal capsule
Seeds
Seeds large, with copious endosperm; aril present or absent
[NTK]

Weigend, M. (2009). Neotropical Vivianiaceae.

Morphology
Description

Shrubs, very rarely annual herbs, spine -tipped short-shoots (brachyblasts) often present. Leaves opposite throughout, rarely in whorls of three, simple , mostly ovate and coarsely crenate to pinnatisect to pinnatifid , sometimes tiny (ca. 1-2 mm, on conical short shoots forming little green cones), base cuneate to cordate ; estipulate. Inflorescences terminal , thyrsoids or pleiothyrsoids, sometimes apparently single and terminal ; inflorescence bracteose or frondose, bracts in Balbisia Cav. often deeply pinnatisect and situated diretly at base of calyx . Flowers hermaphrodite , (4-)5- merous , actinomorphic ; sepals well developed, sometimes larger than petals, entire with acute , usually aristate apex ; petals 0-4-5, (ob-) ovate to widely circular or obcordate, often apically emarginate , pink, white, or yellow; stamens (4-5)-10, usually obdiplostemonous and heterantherous with typically five long and five short stamens, filaments sometimes with pair of basal appendages; gynoecium of 3-5 carpels, syncarpous with 3-5 locules ; style very short, with 3-5 long, papillose stigmatic branches; ovary 3-5- lobed , with 1-20, pendulous, campylotropous ovules in each locule . Nectary disc absent, nectarines sometimes situated on filament appendages. Fruit septicidal or septifragal capsules with 1-8-seeded locules , rarely 5 schizocarps.

Distribution
Distribution in the Neotropics

Vivianiaceae comprise 3 genera and 17 species, all in Southern South America. Most of them are found in semi-arid areas on the western side of the Andes in South America; only Rhynchotheca is endemic to interandean valleys of Peru and Ecuador, where it is found in cloud-forest remnants (e.g. hedges).

  • Rhynchotheca (1 species) -  Peru, Ecuador.
  • Balbisia (11 species) - Chile, Peru, Bolivia, Argentina.
  • Viviania (5 species) - Chile, 1 in Argentina, Uruguay, S Brazil.
Diagnostic
Key differences from similar families
  • Similar to Geraniaceae, but always thin-stemmed and densely branched shrubs (1 herb!).
  • Leaves ovate in outline and shortly petiolate to subsessile.
  • Leaves never palmate.
Notable genera and distinguishing features
  • Balbisia (11 species): flowers bowl-shaped, with yellow, sometimes yellowish-green or reddish-yellow corolla, fruit capsular,  flower subtended by pair of deeply divided bracts.
  • Rhynchotheca (1 species): flowers apetalous, anthers pendulous, 5-partedschizocarp.
  • Viviania (5 species): flowercampanulate, with white or pink petals, pedicellate without bracts directly at base, fruit capsular.
Distinguishing characters (always present)
  • Predominantly shrubs, often with spines.
  • Soft pubescence usually present.
  • Flowers very similar to Geraniaceae.
  • Sepals with aristate tip.
  • Ovary superior and mostly 5-lobed (superficially identical to those of Geraniaceae).
  • Fruit not falling into mericarpids, apart from Rhynchotheca spinosa Ruiz & Pav.
  • R. spinosa with apetalous flowers.
General Description
Number of genera
  • 3 genera.
Status
  • All species are native, and some species are narrowly endemic.
General notes
  • Hunziker & Ariza Espinar (1973) reduced Wendtia Meyen under Balbisia, this judgement is followed here.
  • Viviania has been treated either in a wider sense (Knuth 1912) or segregated into a total of 4 genera (3 monotypic genera Cissabryon Meisn., Caesarea Cambess. and Araeoandra Lefor, Lefor 1975).
  • The segregate genera of Lefor (1975) may or may not be natural entities, but Viviania s.l. including the segregates appears to be a natural unit and a single genus seems amply sufficient to accommodate its 6 species.
  • Rhynchotheca may be the only anemophilous species of Geraniales; its schizocarpic fruits resemble those of Geraniaceae, but are apparently homoplasious.
  • Viviania has nectar -flowers, whereas Balbisia is nectarless and has pollen flowers (Weigend 2005).
Notes on delimitation
  • Members of the Vivianiaceae have often been placed in Geraniaceae or segregated into two families, Vivianiaceae (Viviania Cav.) and Ledocarpaceae (Balbisia, Rhynchotheca Ruiz & Pav.).
  • The three genera are closely allied and are here considered as parts of a single family.
  • Vivianiaceae together with Geraniaceae and Melianthaceae s.l. (incl. Francoaceae) make up the core (and possibly only) families of Geraniales.
Literature
Important literature

Ariza Espinar, L. 1995a. Flora Fanerogámica Argentina Fasciculo 8, 129b. Vivianiaceae. - Córdoba (Argentina): CONICET.

Ariza Espinar, L. 1995b. Flora Fanerogámica Argentina Fasciculo 18, 129a. Ledocarpaceae. - Córdoba (Argentina): CONICET.

Boelcke, O. 1989. Plantas Vasculares de la Argentina. Buenos Aires: Editorial Hemisferio Sur S.A. Brako, L., & Zarucchi, J. L.1993. Catalogue of the Flowering Plants and Gymnosperms of Peru. Monogr. Syst. Bot. Missouri Bot. Gard. 45.

Correa, N.M. 1988. Flora Patagonica V - Dicotyledones dialipétalas. Buenos Aires: INTA.

Hunziker, A.T., & Ariza Espinar, L.1973. Aporte a la rehabilitación de Ledocarpaceae, familia monotipica. Kurtziana 7: 233-240.

Jørgensen P.M., & Yanez León, S. 1999. Checklist of the Vascular Plants of Ecuador. Monogr. Syst. Bot. Missouri Bot. Gard. 75.

Lefor, M. W. M. 1975. 2012. A taxonomic revision of the Vivianiaceae. Univ. Conn. Occ. Papers, Biol. Sc. Ser. 2/15: 225-255.

Plazzesi, L., Gottschling, M., Barreda V. & Weigend, M. 2012. First Miocene fossils of Vivianiaceae shed new light on phylogeny, divergence times, and historical biogeography of Geraniales. Biological Journal of the Linnean Society 107: 67-85.

Price, R.A., & Palmer, J. D. 1993. Phylogenetic relationships of the Geraniaceae and Geraniales from rbcL sequence comparisons. Ann. Missouri Bot. Gard. 80: 661-671.

San Martín, J. 1983. Medicinal Plants in Central Chile. Economic Botany 37(2): 216-227.

Soltis, D. E.,  Soltis, P. S.,  Chase, M. W.,  Mort, M. E.,  Albach, D. C.,  Zanis, M.,  Savolainen, V.,  Hahn, W. H.,  Hoot, S. B.,  Fay, M. F.,  Axtell, M.,  Swensen, S. M.,  Prince, L. M.,  Kress, W. J.,  Nixon, K. C., & Farris, J. S. 2000. Angiosperm phylogeny inferred from 18S rDNA, rbcL, and atpB sequences. Bot. J. Linn. Soc. 133: 381-461.

Weigend, M. 2005. Floral morphology and Pollination in Vivianiaceae (Geraniales). Plant Systematics and Evolution 253: 125-131.

Weigend, M. 2006. Vivianiaceae. In: Kubitzki, K.: The Families and Genera of the Plants IX: 213-220. Springer-Verlag, Berlin, Heidelberg, New York.

Images

Francoaceae A.Juss. appears in other Kew resources:

First published in Ann. Sci. Nat. (Paris) 25: 9. 1832 [Jan 1832] (1832)

Accepted by

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

Sources

Flora Zambesiaca
Flora Zambesiaca
http://creativecommons.org/licenses/by-nc-sa/3.0

Flora of Tropical East Africa
Flora of Tropical East Africa
http://creativecommons.org/licenses/by-nc-sa/3.0

Flora of West Tropical Africa
Flora of West Tropical Africa
http://creativecommons.org/licenses/by-nc-sa/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2020. 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