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This species is accepted, and its native range is Iran.

[KBu]

Pahlevani, A.H. & Rad, M.A. (2019). Two new alpine species of Euphorbia (Euphorbiaceae) from Iran. Kew Bulletin 74: 49. https://doi.org/10.1007/s12225-019-9830-5

Conservation
So far, only three localities for the newly discovered specieshave been found, the type locality and two others nearby in W Mazandaran and in Ardebil province. Based on the limited geographical distribution, IUCN Red list categories and the conservation analysis with limited Extent of occurrence (EOO: 1727.746 km2) and Area of occupancy (AOO: 1083 km2), its conservation status is assessed as ‘Endangered’ (EN B1a,b,i,ii,iii,iv) (IUCN 2017).
Distribution
Asia: Iran.
Ecology
Alpine zone of Talysh Mountains, the subrange of the western part of Alborz Mountains, on rocky and gravelly ground; alt. 2800 – 3710 m.
Ray
Terminal rays 1 – 2, not dichotomous; with no axillary rays
Morphology General Habit
Dwarf glabrous or sparsely puberulent caespitose perennial shrublets, 4 – 9 (10) cm high
Morphology Leaves
Raylet-leaves 2, similar to the ray-leaves but smaller Ray-leaves 2 – 5, sessile, ovate to ovate-orbicular, 5 – 7 × 3.5 – 6.5 mm, truncate to obtuse at the base, entire and cartilaginous at margin, acute to subacute at apex, glabrous to sparsely pilose Cauline leaves sessile, lanceolate, 4 – 10 (14) × 1.5 – 4 mm, attenuate at the base, margin entire to subentire toward apex, apex acute to attenuate, without prominent nerves or only midrib, glabrous to sparsely puberulous abaxially especially at margin
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary smooth, glabrous, style free at the base, up to 1 mm long, stigma 6, bifid
Morphology Reproductive morphology Fruits
Capsules conical, shallowly trilobate, 3 – 4 × 2 – 3 mm, smooth, glabrous, pedicels 3.5 – 5 mm long
Morphology Reproductive morphology Inflorescences Bracts Involucre
Cyathial involucre campanulate, 1.2 – 1.8 mm in diam., internally pilose and externally glabrous; lobes ovate to ovate-lanceolate and praemorse, glands 4, gland appendages oblong and truncate, brownish, with two rather long, delicate and stramineous horns
Morphology Reproductive morphology Seeds
Seeds conical, irregularly and obscurely pitted, 2.2 – 2.8 × 1.6 – 1.8 mm, gray to light brown, caruncle conical, 0.5 – 0.6 × 0.6 – 0.7 mm, ochraceous.
Morphology Stem
Stems numerous, decumbent to ascending, arising from short caudiculi born on a woody stock
Note
Euphorbia mirzakhaniana is closely related to E. gypsicola, but differs by growing as small shrublets (4 – 9 (10) cm high) instead of rather large perennial herbs (20 – 30 cm high), cauline leaves lanceolate (vs ovate to orbicular), 4 – 10 (14) × 1.5 – 4 mm (vs 8 – 16 × 5 – 10 mm); terminal rays 1 (– 2) (vs (3 –) 5); Cyathial glands with two rather long and delicate horns (vs hornless or with very short horns), capsules smaller (3 – 4 × 2 – 3 mm instead of 4.5 – 5.3 × 4.2 – 5 mm). Euphorbia mirzakhaniana belongs to sect. Pithyusa and is sister to E. gypsicola (unpublished data). Euphorbia mirzakhaniana is a mountain-dwelling species which is limited to the alpine region of the Talysh Mountains, whereas, E. gypsicola is a local endemic species which is limited to the gypsum hills in some gypsiferous regions of Semnan province at 1100 – 1600 m elevation. The epithet ‘mirzakhaniana’ is named in honour of Maryam Mirzakhani, the Iranian mathematician and ex-professor of mathematics at Stanford University, the only woman who was awarded the Fields Medal.
Phenology
Flowering specimens found from the end of the June to July. Fruiting specimens found from July to Aug.
Type
Iran, Mazandaran, Ramsar, Javaherdeh, Samamous Mt, 3500 – 3710 m, 36°50'N, 50°23'E, 2 Aug. 2015, Amini Rad & Bahramishad 74617 (holotype IRAN!, isotype W!).

Native to:

Iran

Euphorbia mirzakhaniana Pahlevani appears in other Kew resources:

First published in Kew Bull. 74(3)-49: 5 (2019)

Accepted by

  • Govaerts, R., Nic Lughadha, E., Black, N., Turner, R. & Paton, A. (2021). The World Checklist of Vascular Plants, a continuously updated resource for exploring global plant diversity. https://doi.org/10.1038/s41597-021-00997-6 Scientific Data 8: 215.

Literature

Kew Bulletin

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  • Frodin, D. G. (2004). History and concept of big plant genera. Taxon 53: 753 – 776.
  • Geltman, D. V. (2015). Phytogeographical analysis of Euphorbia subgenus Esula (Euphorbiaceae). Polish Bot. J. 60: 147 – 161.
  • Horn, J. W., Van Ee, B. W., Morawetz, J. J., Riina, R., Steinmann, V. W., Berry, P. E. & Wurdack, K. J. (2012). Phylogenetics and the evolution of major structural characters in the giant genus Euphorbia L. (Euphorbiaceae). Molec. Phylogenet. Evol. 63: 305 – 326.
  • IUCN (2017). IUCN Red List Categories and Criteria: Version 13, IUCN Species Survival Commission. IUCN, Gland & Cambridge. http://intranet.iucn.org/webfiles/doc/SSC/RedList/redlistcatsenglish.pdf.
  • Morton, A. (2009). DMAP for Windows. Distribution map software 7.3., Berkshire.
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  • Pahlevani, A. H., Feulner, M., Weig, A. & Liede-Schumann, S. (2017). Molecular and morphological studies disentangle species complex in Euphorbia sect. Esula (Euphorbiaceae) from Iran, including two new species. Pl. Syst. Evol. 303: 139 – 164.
  • Pahlevani, A. H., Liede-Schumann, S. & Akhani, H. (2015). Seed and capsule morphology of the Iranian perennial species of Euphorbia (Euphorbiaceae) and its phylogenetic application. Bot. J. Linn. Soc. 177: 335 – 377.
  • Riina, R., Peirson, J. A., Geltman, D. V., Molero, J., Frajman, B., Pahlevani, A. H., Barres, L., Morawetz, J. J., Salmaki, Y., Zarre, S., Kryukov, A., Bruyns, P. V. & Berry, P. E. (2013). A worldwide molecular phylogeny and classification of the leafy spurges, Euphorbia subgenus Esula (Euphorbiaceae). Taxon 62: 316 – 342.
  • Steinmann, V. W. & Porter, J. M. (2002). Phylogenetic relationships in Euphorbieae (Euphorbiaceae) based on ITS and ndhF sequence data. Ann. Missouri Bot. Gard. 89: 453 – 490.
  • Takhtajan, A. (1986). Floristic Regions of the World, Berkeley, University of California Press, California (English translation from Russian).
  • Webster, G. L (2014). Euphorbiaceae. In: K. Kubitzki (ed.), The families and genera of vascular plants, Vol. 11: 51 – 216. Springer, Heidelberg.
  • Webster, G. L. (1994). Synopsis of the genera and suprageneric taxa of Euphorbiaceae. Ann. Missouri Bot. Gard. 81: 33 – 144.
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Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Bulletin
Kew Bulletin
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 2021. 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