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■ (SPEC) Iris tectorum Maxim.

1871, Botanist Maximowicz

Iris tectorum Maxim. (Karl Johann Maximowicz, 1871, Central and southwest China); Subgenus Limniris; "Evansia"; 10-15" (25-35 cm), Blue;

See below:

175325.jpg324894.jpgBHP 6607-X2 i tectorum.jpgDykes plate XVLIII tectorum.jpgEY-I-TECTORUM ALBA.jpgI.tectorum01.jpgI.tectorum02.jpgi tectorumblue.jpgImproved Tectorums.jpgIris-tectorum-1Walker.jpgIris-tectorum-2Greenfield.jpgIris-tectorum-3Kondratus.jpgIris-tectorum-4Walker.jpgIris-tectorum-6Walker.jpgIris-tectorum-7Walker.jpgiris seed tectorum 1.jpgIris tectorum.jpgIristectorum01.jpgIristectorumDKrambSIGNA01.jpgIristectorumPBlack01.jpgitectorum01.jpgItectorum03.jpgitectorum03.JPGItectorum04.jpgItectorum05.jpgitectorumvariegated01.jpgSpecTectorumVariegataNH.jpgSpecTectorumWP.jpgtectorum02.jpgtectorum04.jpgtectorum05.jpgtectorum06.jpgtectorum18.jpgtectorum2.JPGtectorum3.jpgtectorum4.JPGtectorum5.JPGtectorum7.JPGtectorum70.JPGtectorum71.JPGtectorum72.JPGtectorum9.jpgTectorum Bot Mag 6118.jpgtectoum8.JPGtectoum80.JPG


Bull. Acad. Pet. 15: 380. 1871; Flor. Serres 22: 23. 1874, illustrated in color; (Introduced Eng. 1874);
Gartenflora [E. von Regel], vol. 21: t. 716 (1872)
Waddick & Zhao, Iris of China, 1992, illustrated in color.
Hooker provides the following notes in Curtis's Botanical Magazine table 6118; September, 1874;
"Although the plant here figured came from Whampoa in China, where it was cultivated by Dr. Hance, Her Brittannic Majesty's Vice-Consul at that port, there can be no question but that it is the Japanese Iris tectorum of Maximovicz, which grows in fields about Yokohama in Japan, and is likewise cultivated by the Japanese. It differs from Maximovicz's description, but not from native specimens, in having three spathes, which are acute or acuminate-characters which (with some others of foliage that are very variable) induced Dr. Hance to publish it as a new species, under the name of tomiolopha, in allusion to its cut crest. On the other hand it differs from Dr. Hance's description in the spreading inner perianth-segments, a character probably due to cultivation, as it occurs in the splendid Iris Kaempferi var. Hendersoni, lately exhibited in the Royal Horticultural Society by Messrs. Henderson, and which is unquestionably a form of I. laevigata, with a spreading perianth. With the North American I. cristata, to which it was referred by the late Professor Miquel, it has no near affinity, but it has with the Himalayan I. decora, wall, of Nepal.

I am indebted to Mr. Bull for the specimen here figured, which was raised from seeds by Dr. Hance from his garden in Whampoa, and which flowered in April, 1874

*Descr.* Rootstock creeping, tuberous, annulate. Leaves about a foot long, by three-quarters to one and a quarter inches broad, ensiform, scarcely glaucous. Scape nearly terete, about as long as the leaves. Flowers three to four inches in diameter. Spathes three, herbaceous, green, erect, longer than the perianth-tube, acute. Pedicel about as long as the ovary, Perianth-tube one inch long; outer segments one and a half inches broad, obovate, margin crisped and waved, pale lilac streaked with violet; claw half as long as the limb, white; crest running up the claw and half the limb, half an inch deep, white and lilac, deeply laciniate; inner segments rather narrower than the outer, spreading, pale lilac, claw short. Stigmas half as long as the perianth-segments recurved, lilac, segments coarsely toothed."
The garden. An illustrated weekly journal of horticulture in all its branches [ed. William Robinson], vol. 50: , fig. 2 (1896)
Gartenflora [E. von Regel], vol. 57: t. 1571 (1908)
Dykes, The Genus Iris, 1913
Rootstock , a stout, pale, buff-coloured rhizome with sessile shoots, not producing stolons, as do most of the other members of the Evansia section.
Leaves , thin, pale green, ribbed, 12-18 in. long by 1-2 in. broad, tapering to a point.
Stem , about 12 in. or rather more in a well-grown plant, bearing reduced leaves and one or two lateral heads.
Spathe , 2-3 flowered, valves green, pointed, 1½-2 in. long.
Pedicel , about ½ in., but becoming eventually somewhat longer.
Ovary , rounded, trigonal, green.
Tube , 1-1½ in., brown purple.
Falls , blade almost orbicular, marked with deep lilac veins and mottlings on a paler ground ; crest white, marked with brown violet, deeply and irregularly laciniated ; haft about half as long as the blade, with red lilac veins on a white ground, and wavy edges.
Standards , blade lilac, obovate, suddenly contracting to a short haft, of which the edges curl over to form a tube. The standards are spreading and slightly concave on the upper surface.
Styles , narrow, over an inch long.
Crests , quadrate, finely serrated.
Stigma , prominent, bilobed, blue.
Filaments , about equal in length to the anthers, colourless.
Anthers , cream coloured.
Pollen , white.
Capsule , oblong, rounded with 6 ribs, walls of thin tough texture, with a coarsely netted surface, rather more than 1 ½ in. long.
Seeds , numerous, globose or pyriform, dark black brown, with small but distinct cream-coloured aril.
Krel. 1875; Macoun; Van W. 1912; Farr 1921; Francis 1920; Sheets 1928; Starker 1938; Van T. 1938;


Roof Iris; chinensis, Bunge: cristata, Miq.; fimbriata, Klatt; germanica, Somoku Dzusetsu; Rosthornii, Diels; tomiolopha, Hance.

Chromosome counts

2n=28, Simonet, 1932; 2n=32, Sharma, 1970; 2n=28, Chimphamba, 1973; 2n=28, Karihaloo,1978; 2n=28, Karihaloo,1984; 2n=28, Huiang, 1986; 2n=36, Mao & Xue, 1986; 2n=28, Huang 1989. 2n=32, Dong et al., 1994.


Iris tectorum cultivars; 'Alba'; 'Adamgrove Strain'; 'Atrocaeruleum' 'Burma Form' 'Freckletec', 'Japan Form' 'Lilacina', 'Middleton Blue', 'Moon Gold', 'Norris Strain', 'Oliver Twist', 'Taiwan Form', 'Tectorum Alba', 'Tectorum album semi plenum' TECTORUM LILACINA, TECTORUM MAJOR, 'Tectorum Sir Arthur Hort's variety 'Tetratec', 'Variegated tectorum' 'Woolong'


Iris tectorum crosses 'Ariel-tec', 'Dorothea', 'Dragonscrest', 'Flying Dragon', 'Honiana', 'Loptec', 'Lucilla', 'Paltec', 'Queen's Grace', 'The Ridges', 'Toltec'

Distribution and Cultivation

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-- ThomasSilvers - 2009-12-10
I Attachment Action Size Date Who Comment
175325.jpgjpg 175325.jpg manage 88 K 26 Jul 2016 - 19:41 BobPries  
324894.jpgjpg 324894.jpg manage 136 K 26 Jul 2016 - 19:45 BobPries Gartenflora
BHP_6607-X2_i_tectorum.jpgjpg BHP_6607-X2_i_tectorum.jpg manage 172 K 11 Feb 2016 - 20:17 BrockHeilman Please contact Brock Heilman for image use.
Dykes_plate_XVLIII_tectorum.jpgjpg Dykes_plate_XVLIII_tectorum.jpg manage 33 K 04 Jan 2011 - 15:38 UnknownUser From Dykes plate
EY-I-TECTORUM_ALBA.jpgjpg EY-I-TECTORUM_ALBA.jpg manage 34 K 19 Sep 2010 - 18:16 UnknownUser Lorena Reid
I.tectorum01.jpgjpg I.tectorum01.jpg manage 68 K 22 Sep 2014 - 14:23 Main.TLaurin Photo scanned from the John Weiler slide collection
I.tectorum02.jpgjpg I.tectorum02.jpg manage 51 K 22 Sep 2014 - 14:25 Main.TLaurin Photo scanned from the John Weiler slide collection
Improved_Tectorums.jpgjpg Improved_Tectorums.jpg manage 44 K 10 Dec 2009 - 20:31 Main.tesilvers Two Iris tectorum seedlings
Iris-tectorum-1Walker.jpgjpg Iris-tectorum-1Walker.jpg manage 39 K 24 Sep 2013 - 13:00 BobPries Ken Walker photo
Iris-tectorum-2Greenfield.jpgjpg Iris-tectorum-2Greenfield.jpg manage 18 K 24 Sep 2013 - 13:02 BobPries Ken Walker photo
Iris-tectorum-3Kondratus.jpgjpg Iris-tectorum-3Kondratus.jpg manage 34 K 24 Sep 2013 - 13:05 BobPries Edmundas Kondratus photo
Iris-tectorum-4Walker.jpgjpg Iris-tectorum-4Walker.jpg manage 64 K 24 Sep 2013 - 13:06 BobPries Ken Walker photo
Iris-tectorum-6Walker.jpgjpg Iris-tectorum-6Walker.jpg manage 65 K 24 Sep 2013 - 13:07 BobPries Ken Walker photo
Iris-tectorum-7Walker.jpgjpg Iris-tectorum-7Walker.jpg manage 69 K 24 Sep 2013 - 13:09 BobPries Ken Walker photo
Iris_tectorum.jpgjpg Iris_tectorum.jpg manage 25 K 10 Dec 2009 - 21:11 Main.tesilvers  
Iristectorum01.jpgjpg Iristectorum01.jpg manage 79 K 19 Sep 2014 - 16:10 Main.TLaurin Photo scanned from the Adele and Lewis Lawyer slide collection
IristectorumDKrambSIGNA01.jpgjpg IristectorumDKrambSIGNA01.jpg manage 62 K 12 Oct 2014 - 03:02 Main.TLaurin Photo by Dennis Kramb-SIGNA
IristectorumPBlack01.jpgjpg IristectorumPBlack01.jpg manage 64 K 12 Oct 2014 - 02:48 Main.TLaurin Photo by Paul Black
Itectorum03.jpgjpg Itectorum03.jpg manage 108 K 06 Jun 2014 - 21:19 Main.TLaurin Photo scanned from the Rosalie Figge slide collection
Itectorum04.jpgjpg Itectorum04.jpg manage 99 K 06 Jun 2014 - 21:21 Main.TLaurin Photo scanned from the Rosalie Figge slide collection
Itectorum05.jpgjpg Itectorum05.jpg manage 117 K 06 Jun 2014 - 21:22 Main.TLaurin Photo scanned from the Rosalie Figge slide collection
SpecTectorumVariegataNH.jpgjpg SpecTectorumVariegataNH.jpg manage 32 K 23 Jun 2013 - 13:35 Main.Betsy881 Photo by Nyla Hughes
SpecTectorumWP.jpgjpg SpecTectorumWP.jpg manage 44 K 15 Jul 2013 - 15:27 Main.Betsy881 Photo by Will Plotner-Wildwood Gardens
Tectorum_Bot_Mag_6118.jpgjpg Tectorum_Bot_Mag_6118.jpg manage 99 K 14 Nov 2013 - 18:08 BobPries Biodiversity Heritage Library
i_tectorumblue.jpgjpg i_tectorumblue.jpg manage 71 K 26 Oct 2013 - 00:28 Main.Harloiris photo Delane Langton, AIS Dallas 2013
iris_seed_tectorum_1.jpgjpg iris_seed_tectorum_1.jpg manage 40 K 29 Sep 2010 - 17:58 UnknownUser seed
itectorum01.jpgjpg itectorum01.jpg manage 59 K 23 Aug 2014 - 13:19 Main.TLaurin Photo by Iris City Gardens
itectorum03.JPGJPG itectorum03.JPG manage 84 K 20 Oct 2014 - 21:23 Main.TLaurin Photo by Joe Pye Weed's Garden
itectorumvariegated01.jpgjpg itectorumvariegated01.jpg manage 56 K 23 Aug 2014 - 13:21 Main.TLaurin Photo by Iris City Gardens
tectorum02.jpgjpg tectorum02.jpg manage 58 K 25 Apr 2014 - 15:19 Main.TLaurin Photo by Aitken's Salmon Creek Garden
tectorum04.jpgjpg tectorum04.jpg manage 68 K 18 Jun 2015 - 18:55 Main.TLaurin Photo by Alla Chernoguz-Ukraine
tectorum05.jpgjpg tectorum05.jpg manage 57 K 17 Jul 2015 - 15:37 Main.TLaurin Photo by Barry Blyth-Australia
tectorum06.jpgjpg tectorum06.jpg manage 68 K 17 Jul 2015 - 15:39 Main.TLaurin Photo by Barry Blyth-Australia
tectorum18.jpgjpg tectorum18.jpg manage 72 K 03 Mar 2014 - 21:28 Main.TLaurin Photo by Chad Harris of Mt. Pleasant Iris Farm
tectorum2.JPGJPG tectorum2.JPG manage 754 K 06 Feb 2017 - 16:45 Main.TLaurin Photo scanned from the Glenn Corlew slide collection
tectorum3.jpgjpg tectorum3.jpg manage 23 K 12 Feb 2010 - 18:24 Main.shanatse I. tectorum
tectorum4.JPGJPG tectorum4.JPG manage 531 K 06 Mar 2018 - 22:44 Main.TLaurin Photo scanned from the Nyla Hughes slide collection
tectorum5.JPGJPG tectorum5.JPG manage 928 K 13 Dec 2017 - 18:59 Main.TLaurin Photo by Cascadia Iris Gardens
tectorum7.JPGJPG tectorum7.JPG manage 153 K 05 Mar 2023 - 03:17 Main.TLaurin Photo by Verna Laurin -1961 AIS Convention-Cedarbrook Park
tectorum70.JPGJPG tectorum70.JPG manage 185 K 07 Mar 2023 - 03:28 Main.TLaurin Photo by Verna Laurin -1974 AIS Convention-F. Stepheson Garden
tectorum71.JPGJPG tectorum71.JPG manage 207 K 17 Apr 2023 - 02:18 Main.TLaurin Photo taken at 1989 AIS Memphis Convention by Verna Laurin at the Pierce Garden
tectorum72.JPGJPG tectorum72.JPG manage 204 K 17 Apr 2023 - 02:21 Main.TLaurin Photo taken at 1989 AIS Memphis Convention by Verna Laurin at the Pierce Garden
tectorum9.jpgjpg tectorum9.jpg manage 204 K 24 Nov 2021 - 03:23 Main.TLaurin Photo by Jean Claude Jacob-Iris de la Baie-France
tectoum8.JPGJPG tectoum8.JPG manage 61 K 12 Dec 2023 - 14:20 Main.TLaurin Photo by Alla Chernoguz-Kiev-Ukraine
tectoum80.JPGJPG tectoum80.JPG manage 89 K 12 Dec 2023 - 14:21 Main.TLaurin Photo by Alla Chernoguz-Kiev-Ukraine
Topic revision: r48 - 12 Dec 2023, TLaurin
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