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■ (SPEC) Iris missouriensis Nuttall

1834, Botanical author Nuttall

Iris missouriensis Nuttall. ( Thomas Nuttall, 1834, Great Basin, Rockies, U.S.A.); Section Limniris, Series Longipetalae,

See below:
Panayoti Kelaidis photoLorena Reid photoPanayoti Kelaidis photo Hoosier Pass ColoradoSpec Iris Misouriensis red purplePhoto scanned from the John Weiler slide collectionPhoto by John Black, on bank of Musselshell River, Harlowtonn, MontanaPhoto scanned from the Adele and Lewis Lawyer slide collectionPhoto scanned from the Adele and Lewis Lawyer slide collectionPanayoti Kelaidis photoclump: collected from Odessa, WAfrom western WAcollected Odessa, WAPhoto by Jeanette GrahamBiodiversity Heritage LibraryLowell Baumunk photoseedPhoto taken in Little Belt Mountains of central Montana. Photo by John BlackPanayoti Kelaidis photo South Park ColoradoPanayoti Kelaidis photo South Park ColoradoPanayoti Kelaidis photo South Park Colorado


Nuttall in Journal Acad. Philad. VII I. p.58 (1834)
Curtis's Botanical Magazine t. 6579, 1881, John Gilbert Baker provided the following;"Iris missouriensis.

Native of California and the Rocky Mountains.

Nat. Ord. Iridaceae. — Tribe Ibidem.
Genus Iris, Linn.; (Baker in Journ. Linn. Soc. vol. xvi. p. 13<>.)

Iris (Apogon) missouriensis ; foliis linearibus rigidulis subpedalibus, caulibu 2-3-floris fistulosis sursum angulosis, spathoe valvis niagnis lanceolatis apice membranaceis, pedicellis spatbse valvis ssepissime brevioribus, ovario cylindrico-trigono, periantbii tubo brevi infundibular!, segmentis exterioribus oblongis unguiculatis reflexis 2-2^ poll, longis pallidis lilacino-striatis luteo-carinatis, segmentis interioribus ereetis lilacinis oblanceolato-unguiculatis exterioribus vix brevioribus, stylt cristis subquadratis ineiso-dentatis, antberis filanientis asquilongis, capsulis obloiigo-trigonis apice et basi cuneatis.

I. missouriensis, Nuttall in Journ. Acad. Philad. vol. vii. p. 58 ; S. Wats, in Bot. Calif, vol. ii. p. 140. I. Tolmieana, Herbert in Hook, et Am. Bot. Beech, p. 395; S. Wats, in But. King. Expedit. 342 ; Baker in Gard. Chron. 1876, p. 226 ; Journ. Linn. Soc. vol. xvi. p. 138.
This appears to be the commonest Iris of the Rocky Mountains. I place the plant we have long known in England as Tolmieana as a synonym of Nuttall' s doubtful missouriensis, on the authority of Dr. Sereno AVatson,. who, in the recently-published " Botany of California," states its distribution as follows : — " On the eastern side of the Sierra Nevada from Inyo to Siskiyou county and the Columbia, common in the mountains of the interior eastward to Colorado and Montana, and south to Arizona ; apparently the only species of the Great Basin." Whether it be more than a montane variety of the Californian Iris longipetala of Herbert (Bot. Mag., Tab. 5298), which is a very much finer plant from a cultural point of view, I greatly doubt. Although long known, it has never been previously figured. Our drawing was made from a plant sent at the end of May from Mr. F. Horsman, of the New Plant and Bulb Company, Colchester..

Descr. Rhizome short, creeping, with fleshy root-fibres. Produced leaves about four to a tuft, linear, not more than a foot long, firm in texture, a quarter or a third of an inch broad, narrowed gradually to the point. Stem overtopping the leaves, bearing a single terminal cluster of two or three flowers, fistular, subterete in the lower part, angled towards the top. Spathe-valves lanceolate, two or three inches long, membranous towards the tip. Peduncles nearly always shorter than the spathe-valves. Ovary cylindrico- trigonous, three-quarters of an inch or more long at the flowering time. Perianth-tube fundibuliform, not more than a quarter or a third of an inch long ; outer segments of the limb oblong-unguiculate, reflexing, two or two and a half inches long, veined with lilac-purple on a pale groundwork, and faintly keeled with yellow towards the base of the limb ; inner segments nearly as long as the outer, erect, oblanceolate, with a long claw, emarginate, plain lilac-purple. Stigmas an inch long, exclusive of the reflexing subquadrate strongly-toothed crests. Anthers as long as the filaments. Capsule oblong-trigonous, an inch or an inch and a half long, cuneate at the base and apex. — J. G. Baker.
Iris missouriensis 2002 Iris missouriensis 2005
The Garden 50: 186. 5 Sep. 1896,
Dykes in The Genus Iris; 1913,

This Iris, which sometimes occurs in gardens under the name of I. longipetala montana (see Lynch I.e.), scarcely needs a separate description. It differs only in being more slender in all its parts, in holding its flowers well above the leaves, and in losing its leaves entirely in late autumn, Its colour, the shape of its capsule, and the seeds are identical with those of I. longipetala. In both cases the perianth tube is short, of a pale yellow-green, and not perceptibly constricted above the ovary.

Observations, see Dykes under Series Longipetalae,
Davidson, B. L., (1957), Iris Missouriensis and Iris Longipetala, Bulletin of the American Iris Society, No. 147, p. 13-22. October, 1957;
Van Tubergen 1900; Grull. 1907; Van Waverin 1911; Farr 1912; Macoun; Perry 1933; 1938; Wallace 1933; Starker 1938; Toole 1938;
H.C., R.H.S. 1916; AA clvii.;


Rocky Mountain Iris; Iris longipetala montana, Baker; Iris tolmeiana, Herbert. ----

Chromosome counts

2n=38, R. C. Foster. 1937; 2n=88, Snoad, 1952. ----


Iris missouriensis Nuttall. Iris missouriensis cultivars 'Angustispatha'; 'Arizonica'; 'Bluebird'; 'Camas Blue'; 'Claude Barr'; 'Colockum Road'; 'Hawksbluff Strain'; 'Miss Bluejay'; 'Miss Peacock'; 'Miss Pink Dove'; 'Miss Purple Finch'; 'Miss White Canary' 'Montana'; 'Pelegonus'; 'Snowbird' ----


_Iris missouriensis_ crosses 'Monwat'; 'Tollong'; 'Toltec'

¼ Iris missouriensis crosses 'Dwayne Stoneking'


Distribution and Cultivation

Distribution: The distribution of the species gives clues as to its cultural requirements, although plants in cultivation can often tolerate a wider range of variables:
The species is found in the following region:

Bonap's North American Plant Atlas shows the following map reproduced by permission of Kartesz, J.T., The Biota of North America Program (BONAP). 2015. Taxonomic Data Center. ( Chapel Hill, N.C. [maps generated from Kartesz, J.T. 2015. Floristic Synthesis of North America, Version 1.0. Biota of North America Program (BONAP). (in press)]

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-- BobPries - 2010-02-18
I Attachment Action Size Date Who Comment
Albino416907_3045439746227_1570140429_32640733_959138290_n.jpgjpg Albino416907_3045439746227_1570140429_32640733_959138290_n.jpg manage 155 K 08 Feb 2012 - 00:58 BobPries Panayoti Kelaidis photo
FI-I-MISSOURIENSIS.jpgjpg FI-I-MISSOURIENSIS.jpg manage 39 K 19 Sep 2010 - 20:27 BobPries Lorena Reid photo
Hoosier_pass424524_3045424225839_1570140429_32640731_1083456967_n.jpgjpg Hoosier_pass424524_3045424225839_1570140429_32640731_1083456967_n.jpg manage 67 K 08 Feb 2012 - 00:59 BobPries Panayoti Kelaidis photo Hoosier Pass Colorado
I._missouriensis_red_purple_sm.jpgjpg I._missouriensis_red_purple_sm.jpg manage 24 K 03 Jan 2011 - 00:29 Main.crivera Spec Iris Misouriensis red purple
I.missouriensis01.jpgjpg I.missouriensis01.jpg manage 62 K 22 Sep 2014 - 02:47 TerryLaurin Photo scanned from the John Weiler slide collection
I.missouriensis1.JPGJPG I.missouriensis1.JPG manage 710 K 26 Jan 2017 - 23:32 Main.Harloiris Photo by John Black, on bank of Musselshell River, Harlowtonn, Montana
Irismissouriensis01.jpgjpg Irismissouriensis01.jpg manage 77 K 19 Sep 2014 - 00:45 TerryLaurin Photo scanned from the Adele and Lewis Lawyer slide collection
Irismissouriensis02.jpgjpg Irismissouriensis02.jpg manage 80 K 19 Sep 2014 - 00:47 TerryLaurin Photo scanned from the Adele and Lewis Lawyer slide collection
Miisouriensis_Closeup409270_3045456586648_1570140429_32640735_1121793692_n.jpgjpg Miisouriensis_Closeup409270_3045456586648_1570140429_32640735_1121793692_n.jpg manage 49 K 08 Feb 2012 - 01:00 BobPries Panayoti Kelaidis photo
Miss_F.jpgjpg Miss_F.jpg manage 41 K 09 Jan 2011 - 02:23 Main.shanatse collected Odessa, WA
Missouriensis_Bot_Mag_6579.jpgjpg Missouriensis_Bot_Mag_6579.jpg manage 62 K 22 Nov 2013 - 17:38 BobPries Biodiversity Heritage Library
South_Park395398_3045467386918_1570140429_32640738_754024326_n.jpgjpg South_Park395398_3045467386918_1570140429_32640738_754024326_n.jpg manage 49 K 08 Feb 2012 - 01:01 BobPries Panayoti Kelaidis photo South Park Colorado
South_Park409536_3045447466420_1570140429_32640734_1152401043_n.jpgjpg South_Park409536_3045447466420_1570140429_32640734_1152401043_n.jpg manage 58 K 08 Feb 2012 - 01:02 BobPries Panayoti Kelaidis photo South Park Colorado
South_Park424524_3045424225839_1570140429_32640731_1083456967_n.jpgjpg South_Park424524_3045424225839_1570140429_32640731_1083456967_n.jpg manage 95 K 08 Feb 2012 - 01:02 BobPries Panayoti Kelaidis photo South Park Colorado
miss-clump.jpgjpg miss-clump.jpg manage 63 K 09 Jan 2011 - 02:25 Main.shanatse clump: collected from Odessa, WA
miss-wWA.jpgjpg miss-wWA.jpg manage 59 K 09 Jan 2011 - 02:22 Main.shanatse from western WA
missouriensis9.JPGJPG missouriensis9.JPG manage 142 K 25 Jun 2021 - 19:17 TerryLaurin Photo by Jeanette Graham
missouriensis_from_Ferguson_baumunk.jpgjpg missouriensis_from_Ferguson_baumunk.jpg manage 38 K 20 Sep 2010 - 16:54 BobPries Lowell Baumunk photo
missouriensis_seed.jpgjpg missouriensis_seed.jpg manage 35 K 29 Sep 2010 - 18:10 BobPries seed
rsz_7-022.jpgjpg rsz_7-022.jpg manage 87 K 30 Mar 2016 - 17:14 Main.Harloiris Photo taken in Little Belt Mountains of central Montana. Photo by John Black
Topic revision: r23 - 27 Mar 2022, TerryLaurin
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