(SPEC) Iris fortis

Alexeeva N. B. Iris fortis, a new combination for Iris tigridia var. fortis (Iridaceae) // Turczaninowia, 2024. Vol. 27, № 4. P. 175–181 DOI: 10.14258/turczaninowia.27.4.20. URL: https://turczaninowia.asu.ru/article/view/16658.

* Iris fortis * Iris fortis is validated as a name at new (species) combination for the taxon previously known as Iris tigridia var. fortis Y. T. Zhao from China. Additional Mongolian locality is reported. https://turczaninowia.asu.ru/article/view/16658/14308 See below:

• References

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References

| Translation of the cited article
In 2007 and 2018, during the floristic studies of the Russian-Mongolian expeditions in the north of Mongolia, we managed to collect material that significantly supplemented the data on the taxonomic composition of the genus Iris L. (Iridaceae) of this country. Then additional locations for the flora of Mongolia of species of the genus Iris were discovered and published Alexeeva,2011, 2018) additional locations for the flora of Mongolia of species of the genus Iris: I. ivanovae Doronkin, I. kamelinii Alexeeva and I. schmakovii Alexeeva.
Another variety – Iris tigridia var. fortis Y. T. Zhao – was discovered on the road from Muren to Arbulag (Khubsugul aimag) on the Khuzhirt pass at an altitude of 1830 m above sea level. The samples were collected on the slope of a hill near the road(Fig. 1). The variety Iris tigridia var. fortis was described in 1980 (Zhao, 1980) based on material collected by T. C. Zhu on the slope of Mount Lungtan, Jilin Province, on May 13, 1954. Upon examination of herbarium specimens in Beijing (PE), we came to the conclusion that this variety deserves species rank (Figs. 2–4).
The discovery of plants in Mongolia confirmed this decision. The variety is close to I. ivanovae and I. tigridia, but has a high peduncle - 15 cm, while the other two compared species have sessile peduncles, almost at the ground (Fig. 5). I. tigridia var. fortis has larger dimensions of the entire plant, the width of the basal leaves exceeds the leaves of the already mentioned species by two times, they have a protruding central vein, and develop up to 20 cm high before flowering, and not during fruiting, as in closely related species; leaflets of the involucre are lanceolate, large; on the outer lobes of the perianth, over the entire plate, on a white background, there are purple spots (not strokes), turning into a uniform purple along the edge; the perianth tube in I. ivanovae and I. tigridia does not exceed 2 cm long, in the variety it is more than 2.5 cm long (Doronkin, 1987; Waddick, Zhao, 1992; Enkhtuyaa, 2009; Alexeeva, 2020). Below is a new nomenclatural combination at the species rank.
*Iris fortis* (Y. T. Zhao) Alexeeva comb. et stat. nov. – I. tigridia var. fortis Y. T. Zhao, 1980, Acta Phytotaxonomica Sinica 18(1): 60. – Iris grandiflora. The type is stored in the Herbarium of Jilin Normal University: “Jilin City (Jininshi), Longtan Mountain. 31 V 1954. Zhu Yancheng (T. C. Zhu)”. Plant 20 cm high. Leaves linear-lanceolate, 10–20 cm long, 3–6 mm wide, green. Peduncle 15 cm high, 1.5–2 mm in diameter. Involucral leaflets (spatas) lanceolate 4–5 cm long, 8–10 mm wide, flowers purple 4.5–5 cm in diameter, perianth tube 2.5 cm long, outer perianth lobes obovate, 5 cm long, 1.5 cm wide, inner perianth lobes oblanceolate, 4 cm long, 8 mm wide, stamens 2 cm long, supra-stigmatic ridges irregularly deltoid, ovary 1.8 cm long The species grows in China: Jilin, Inner Mongolia, Shanxi. We present this species for the first time for Mongolia: "Khövsgöl aimag, on the road from Muren to Arbulag on the Khuzhirt pass, at an altitude of 1830 m above sea level, N49˚50'10", E100˚02'00". 18 VI 2018. N. B. Alexeeva" (LE 01234690). It prefers to grow in meadows on sunny hillsides and on forest edges
Acknowledgments
The author is grateful to Mongolian colleagues Ochgerel and Enkhtuya for preparing the route and organizing the expedition across Mongolia in 2018. The work was supported by the scientific project of the Komarov Botanical Institute of the Russian Academy of Sciences (No. 122011900031-0)
REFERENCES / ЛИТЕРАТУРА Alexeeva N. B. 2011. New species of Iris L. (Iridaceae) for the flora of Mongolia. Turczaninowia 14, 1: 59–60. [In Russian]
(Алексеева Н. Б. Новые виды рода Iris L. (Iridaceae) для флоры Монголии // Turczaninowia, 2011. Т. 14, № 1. С. 59–60). Alexeeva N. B. 2018. New species of Iris L. (Iridaceae) from Mongolia. Turczaninowia 21, 4: 145–149. [In Russian]
(Алексеева Н. Б. Новый вид рода Iris L. (Iridaceae) из Монголии // Turczaninowia, 2018. Т. 21, № 4. С. 145–149). DOI: 10.14258/turczaninowia.21.4.14 Alexeeva N. B. 2020. Iris L. (Iridaceae Juss.) in the Russia. St. Petersburg: Pervyy IPKh. 232 pp. [In Russian, in English] (Алексеева Н. Б. Ирисы Iris L. (Iridaceae Juss.) России. СПб.: «Первый ИПХ», 2020. 232 с.). Doronkin V. M. 1987. Iris L. In: Flora Sibiri [Flora of Siberia]. Vol. 4. Novosibirsk: Nauka. Pp. 114–124. [In Russian] (Доронькин В. М. Iris L. – Касатик // Флора Сибири. Т. 4. Новосибирск: Наука, 1987. С. 114–124). Enkhtuya L. 2009. Irises (Iris L.). Ulaanbaatar: Bembi san. 223 pp. [In Mongolian] (Энхтуяа Л. Цахилдаг (Iris L.). Улаанбаатар: Бемби сан, 2009. 223 pp.). Waddick J. W., Zhao Y. T. 1992. Irises of China. Portland, Oregon: Timber Press. 192 pp. Zhao Y. T. 1980. Some notes on the genus Iris of China. Acta Phytotax. Sin. 18(1): 53–61
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-- BobPries - 2011-03-07