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■ (SPEC) Iris acutiloba Mey.

1831, Botanical author Carl Anton Meyer

Iris acutiloba Mey. (Carl Anton Meyer, 1831, Transcaucasia); Dwarf, Section Oncocyclus, height 6-12" (15-30 cm);

Although we have followed Mathew and included lineolata as a subspecies of acutiloba many botanists in Russia and Turkey would still argue that these are separate species. It is said that lineolata is more rhizomatous and typical acutiloba more clump forming. There is also a disjunct in distribution with lineolata an Iranian plant and acutiloba occuring in the Transcaucasus North of the River Kura. Also the typical acutiloba Has two blotches one in the center of the fall and one near the tip of each fall. This form was named bimaculata. Single blotch specimens are also said to exist but it is unclear that these are separate from lineolata.

See below:
Acutiloba-ASI.jpgacutiloba-Mcallisterhunt red.jpgAcutiloba-Ramazan in Dagestan.jpgacutiloba - Fragman-Sapir.jpgacutiloba  - Mayr.jpgAcutiloba edited-1.jpgacutiloba Fikso malabad Iran.jpgacutiloba shockey.jpgacutiloba ssp acutilobaJB.jpgI. acutiloba lineolataJB19.jpgI. acutiloba ssp.acutilobaJB17.JPGIris-acutiloba-31.jpgIris-acutiloba-Achilles2.jpgIris-acutiloba-Hans Achilles.jpg


Verz. Pl. Cauc. 32: 1831;
Gartenflora 13: 323. 1874,
Curtis’s Botanical Magazine, 2nd series, vol. 26(3): t. 654 (1984)
Krelage 1875; Van Tubergen 1909;
Dykes in The Genus Iris, 1913;
Rootstock , a short compact rhizome, with crowded tufts.
Leaves , 1/6-1/4 in. broad by 3-4 in. long at flowering time, linear, more or less falcate.
Stem , 1-headed, short, 1 1/2-4 in.
Spathe valves , lanceolate, pointed, green, 2 in. long, I-flowered.
Pedicel , very short.
Ovary , trigonal.
Tube , cylindrical, an inch long, green, with purple mottlings.
Falls , creamy white, with thick brownish veins ; in front of the styles there is a conspicuous brown signal patch ; the beard is diffuse and composed of brown hairs ; the lanceolate blade is not separated by any constriction from the broad haft, but is sharply reflexed.
Standards , broader and longer than the falls, much veined with dark purple-brown on a creamy white or grey ground.
Styles , much dotted with brown and coming close down on to the falls.
Crests , small, deltoid, reflexed laterally not vertically.
Stigma , entire.
Fi!aments , greenish.
Anthers , green, with dark edges.
Pollen , greenish, yellow. Capsule , trigonal, tapering at either end, especially to the apex and dehiscing below the apex.
Seeds , nearly spherical, somewhat wrinkled, dark brownish red, with a very conspicuous yellowish white aril, sometimes almost as big as the seed itself.


There appear to be a number of local forms of this Iris, some of which are described in the article already quoted in the Bulletin of the Tiflis Botanic Garden. The varieties there mentioned are:
var. typica , Trautvetter (I.e.). The standards are much longer than the falls on which the veins gradually fade away towards the margin. This variety is said to be found near Baku.
var. lineolate . The segments are all approximately equal and the veins on the falls are deep in colour and tend to grow thicker instead of fading away as they approach the edge. The falls of this variety are said to extend horizontally and it is possible therefore that this is a synonym for I. Ewbankiana. The locality is given as Dia bar in the Swant district on the right bank of the Cyri.
var. Schelkownikowi has larger flowers with very dark standards and a yellow beard on the falls. It comes from the Karadscha-dagh and the Bosdagh on the left bank of the Cyri.
var. bimaculata , I can find no description of this variety, of which however I have received seeds through the kindness of M. Fomin of the Tillis Botanic Garden.
The Gardeners' Chronicle 3rd. Ser. 94: 451. 16 Dec. 1932, illustrated;
Yr. Bk., I.S.(E.) 41. 1933.



Iris acutifolia, C. A. Meyer; Oncocyclus acutilobus Siemss; Iris polakii Stapf; see also syn. 'Ewbankiana'. ----

Chromosome counts

2n=20-Delaunay 1928, 2n=20-Simonet 1932, 2n=20-Zakharyeva & Makushenko 1969; 2n=20-Gustafsson & Wendelbo 1975; 2n=20-Awishai & Zohary 1980. ----


Iris acutiloba Mey Several color forms of lineolata exist with creamy or yellow markings but the usual forms are with creamy white ground color but more or less heavily veined purple-brown; Falls usually reflexed especially in typical acutiloba, but in some forms, especially lineolata, they are spreading horizontally, with a conspicuous reddish brown spot for a signal area at the entrance to the pollen tunnel formed by the style arms. The beard of short brownish hairs; Standards larger than falls and pointed, Style greenish dotted brown; filaments and anthers green. From the specimens I have seen subspecies acutiloba is a smaller plant, whereas lineolata is larger. Both seem rather easy to grow in pots in an alpine house, following typical Oncocyclus culture. The color variations are very interesting and one could make an interesting collection of these plants. Since they grow in more mountainous areas, they are much cold hardier than some of the Israel-Palestinian Oncocyclus. ---Robert Pries Iris Encyclopedia



Iris acutiloba has also produced the following hybrids;

And the following cultivars have I. acutiloba as a grandparent; 'Aril Sanctum'. 'Darling Who Knows' 'Kazakhstan'; 'Rojen's Saga'. ---- ----

Distribution and Cultivation

Distribution: Region:


Acutiloba-ASI.jpgacutiloba-Mcallisterhunt red.jpgAcutiloba-Ramazan in Dagestan.jpgacutiloba - Fragman-Sapir.jpgacutiloba  - Mayr.jpgAcutiloba edited-1.jpgacutiloba Fikso malabad Iran.jpgacutiloba shockey.jpgacutiloba ssp acutilobaJB.jpgI. acutiloba lineolataJB19.jpgI. acutiloba ssp.acutilobaJB17.JPGIris-acutiloba-31.jpgIris-acutiloba-Achilles2.jpgIris-acutiloba-Hans Achilles.jpg

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-- Main.RPries - 2009-11-04
I Attachment Action Size Date Who Comment
Acutiloba-ASI.jpgjpg Acutiloba-ASI.jpg manage 173 K 19 Jan 2015 - 14:21 BobPries Aril Society International photo
Acutiloba-Ramazan_in_Dagestan.jpgjpg Acutiloba-Ramazan_in_Dagestan.jpg manage 186 K 19 Jan 2015 - 14:29 BobPries Ramazan photo taken in Dagestan
Acutiloba_edited-1.jpgjpg Acutiloba_edited-1.jpg manage 68 K 21 Sep 2010 - 18:47 UnknownUser Pries Photo
I. acutiloba lineolataJB19.jpgjpg I. acutiloba lineolataJB19.jpg manage 106 K 26 Apr 2019 - 13:03 Main.Betsy881 Photo by John Baumfalk
I._acutiloba_ssp.acutilobaJB17.JPGJPG I._acutiloba_ssp.acutilobaJB17.JPG manage 26 K 15 Apr 2017 - 12:54 Main.Betsy881 Photo by John Baumfalk
Iris-acutiloba-31.jpgjpg Iris-acutiloba-31.jpg manage 128 K 19 Jan 2015 - 14:24 BobPries Ori Fragman-Sapir photo
Iris-acutiloba-Achilles2.jpgjpg Iris-acutiloba-Achilles2.jpg manage 117 K 19 Jan 2015 - 14:27 BobPries Hans Achilles photo
Iris-acutiloba-Hans_Achilles.jpgjpg Iris-acutiloba-Hans_Achilles.jpg manage 180 K 19 Jan 2015 - 14:23 BobPries Hans Achilles photo
acutiloba-Mcallisterhunt_red.jpgjpg acutiloba-Mcallisterhunt_red.jpg manage 63 K 03 Sep 2010 - 01:26 UnknownUser Hunt photo
acutiloba_-_Fragman-Sapir.jpgjpg acutiloba_-_Fragman-Sapir.jpg manage 27 K 06 Feb 2010 - 00:13 Main.Betsy881 Photo by Fragman-Sapir
acutiloba_Fikso_malabad_Iran.jpgjpg acutiloba_Fikso_malabad_Iran.jpg manage 286 K 05 Dec 2013 - 19:14 BobPries Adam Fisko photo
acutiloba__-_Mayr.jpgjpg acutiloba__-_Mayr.jpg manage 34 K 06 Feb 2010 - 00:12 Main.Betsy881 Photo by Josef Mayr
acutiloba_shockey.jpgjpg acutiloba_shockey.jpg manage 81 K 05 Dec 2013 - 19:15 BobPries Shockey Photo
acutiloba_ssp_acutilobaJB.jpgjpg acutiloba_ssp_acutilobaJB.jpg manage 45 K 01 Apr 2016 - 17:29 Main.Betsy881 Photo by John Baumfalk
Topic revision: r28 - 23 Nov 2021, BobPries
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