Impatiens tainingensis J. - D. Lin & P. Li sp. nov.

Figs 2, 3

Type.

China. Fujian • Taining County, Mt. Zhuangyuanyan, 26°58'12.35"N, 117°11'55.89"E, 312 m a. s. l., 31 Jul 2022, Jin et al. Jin Xin Jie 349 (holotype: ZM; isotype: HZU, FUN).

Diagnosis.

Impatiens tainingensis is similar to I. platysepala, I. kuocangshanica and I. huangyanensis subsp. attenuata in pinkish purple flowers. But I. tainingensis differs from I. platysepala by its bracts green, persistent, linear-lanceolate, 1–2 mm long; lower sepal subsaccate-funnelform, spur 1.5–1.8 cm long. I. tainingensis is distinct from I. kuocangshanica and I. huangyanensis subsp. attenuata in having lower sepal subsaccate-funnelform, spur 1.5–1.8 cm long; lateral sepals suborbicular, callous, 6–8 × 5–8 mm; capsules fusiform, 1.5–2.0 cm long and seeds 2.0 × 1.0 mm.

Description.

Annual herb, 40–80 cm tall, glabrous. Root fibrous. Stem erect or ascending in lower part, slender and fleshy, simple, or laxly branched. Leaves alternate; petiole 2–4 cm long; blade papery, pale green, ovate-elliptic, 5–11 × 2–3.5 cm, lateral veins 5–7 pairs, curved, base cuneate, attenuate into petiole, margin crenate-serrate or crenate, teeth mucronulate, apex caudate-acuminate; Inflorescences axillary, 1–3 - flowered; peduncles 1–2 cm long. Pedicels 1.5–2.5 cm long, bracteate at base; bracts persistent, linear-lanceolate, 1–2 mm long, apex shortly acute. Flowers pink-purple, ca. 3 cm deep. Lateral sepals 2, suborbicular, 6–8 × 5–8 mm, callous, margin entire, apex green long mucronulate, abaxial midvein narrowly carinate. Lower sepal purple striate, 1.9–2.4 cm deep, subsaccate-funnelform, gradually narrowed into an incurved spur; spur 1.5–1.8 cm long; mouth vertical, ca. 1.5–1.7 cm wide. Upper petal oblate, 1.2–1.3 × 1.7–1.9 cm, apex emarginate, shortly rostellate, abaxial midvein cristate; lateral united petals, shortly petiolate, 2 - lobed; basal lobes obovate to dolabriform, small, 0.9–1.0 × 0.6–0.7 cm, apex obtuse; distal lobes dolabriform, large, 2.0–2.2 × 1.2–1.4 cm, apex obtuse or emarginate; auricle inflexed, yellow; Filaments linear, anthers ovoid, apex obtuse. Ovary erect, fusiform, ca. 5 mm long. Capsule fusiform or linear-cylindric, 1.5–2.0 cm long; seeds many, yellowish brown, ovoid-oblong, 2.0 × 1.0 mm, tuberculate.

Phenology.

Flowering and fruiting from May to September.

Distribution and habitat.

Taining, Fujian, southeastern China; known only from the type of location (Fig. 1). Moist places in valleys of Danxia landform; 300– 400 m.

Conservation Status.

Based on its limited area and extent of occurrence, Impatiens tainingensis could be categorized as near threatened (NT) according to IUCN criteria (IUCN Standards and Petitions Committee 2022). It is found at only three sites in Taining County in Fujian Province; there is no obvious downward trend in the population size, and there are currently thousands of individuals at each site.

Additional specimens examined (paratypes).

China. Fujian Province • Taining County, Mt. Zhuangyuanyan, 26°58'12.35"N, 117°11'55.89"E, 312 m, 9 August 2014 (fl.), Jiedong Lin Jin Xin Jie 397 (HZU).

Comparative material examined (allied species).

Impatiens chekiangensis — China. Fujian Province • Mt. Wuyi, 400 m, 22 Octorber 1965 (fl.), Guozong Mao 10513 (HHBG). Zhejiang Province • Hangzhou City, Lin’an District, Changhua Town, 960 m, 19 June 1957 (fl. & fr.), Deng et al. 23509 (HHBG); • Shunxi Town, 280 m, 2 July 1986 (fl.), Guojiang Zhang L 8442165 (IBSC); • Lishui City, Longquan City, 20 July 1958 (fl.), Renye Sahn 5510 (PE); ibidem, 14 September 1959 (fl.), Shaoyao Zhang 6799 (KUN); • Suichang County, Mt. Jiulong, 400 m, 22 September 1989 (fl.), Yilin Chen s. n. (PE); ibidem, 850 m, 5 July 1991, Xu 1115 (ZM); • Zhedaikou Town, Chenkeng Protection Station, 28°19'31"N, 118°49'43"E, 709.46 m, 29 October 2017 (fl. & fr.), Xin Zhong et al. ZX 04178 (CSH); • Taizhou City, Xianju County, Yukeng Nature Reserve, 450 m, 20 July 2000 (fl.), Xiaofeng Jin 6918 (PE); • Wenzhou City, Yueqing City, Mt Yandang, 250 m, 16 May 2005 (fl.), Xiaofeng Jin & Peijian Cao 1537 (PE); • Quzhou City, Wuxi River National Wetland Park, 26 April 2019 (fl. & fr.), Yongfu Xu et al. ZJQZWXJ 20190426017 (CSFI); Jiangxi Province • Jiujiang City, Wuning County, Songxi Town, Yanxia Village, 29°23'13"N, 115°00'07"E, 145 m, 24 October 2013, Xuanhuai Zhan et al. LXP 0609 (LBG).

Impatiens fujianensis — China. Fujian Province • Wuyishan City, Sangu Town, Wuyi Mountain National Park, 27°44'56"N, 117°38'23"E, 1327 m, 4 Octorber 2023 (fl.), Liang Ma 20231004001 (PE).

Impatiens huangyanensis — China. Zhejiang Province • Taizhou City, HuangYan County, Shabu Town, Ersiheng Village, 300 m, 2 August 2000 (fl.), Xiaofeng Jin 6928 (PE); ibidem, 330 m, 2 August 2000 (fl.), Xiaofeng Jin 6929 (PE).

Impatiens kuocangshanica — China. Zhejiang Province • Taizhou City, Xianju County, 15 May 1960 (fl.), 7887 (HHBG); • Yukeng Forest area, 350 m, 26 November 1982 (fl.), Hangzhou Botanical Garden Herbarium 2788 (HHBG).

Impatiens platysepala — China • Fujian Province: fl. & fr., H. C. Chao 1788 (PE); 20 September 1932 (fl. & fr.), Daxuan Wang 838 (PE); • Chongan County, Mt. Wuyi, 380 m, 4 July 1974 (fl.), Team 236-6 499 (PE); • Nanping City, Songxi County, 27°26'43"N, 118°46'7"E, 675 m, 28 August 2017 (fl.), Xiangxiu Su CSH 22213 (CSH). Zhejiang Province • Lishui City, Jingning County, 20 October 1964 (fl.), Zongguo Mao 10349 (HHBG); • Qingyuan County, Shangzhuang Village, 200 m, 21 September 1989 (fl.), Yilin Chen 89-02 (PE); • Wenzhou City, Taishun County, Chenmeikeng, 610 m, 5 May 1990 (fl.), Li et al. 0706 (ZM); • Quzhou City, Jiangshan City, Jianglang Mountain National Scenic Area, 28°31'57"N, 118°33'53"E, 25 April 2017 (fl.), Xin zhong et al. ZX 03052 (CSH); • Taizhou City, Linhai County, Mt. Kuocangshan, 100 m, 2 July 2005 (fl.), Xiaofeng Jin 1551 (HTC). Anhui Province: • Lu’an City, Shucheng County, 500 m, 20 September 1996 (fl.), M. B. Deng 93034 (PE); • Huangshan City, Xiuning County, Mt. Qiyun, 480 m, 29°48'38"N, 118°1'33"E, 6 June 2012 (fl.), D. E. Boufford et al. 42916 (PE). Jiangxi Province • Shangrao City, Guangfeng District, 24 October 1958 (fl. & fr.), Minxiang Nie & Shunshen Lai 5930 (PE, KUN); • Wufushan Town, 1000 m, 14 September 1958 (fl.), Shusheng Lai & Minxiang Nie 5050 (IBSC, KUN); • Gangboshan Nature Reserve, 28°08'22"N, 118°16'42"E, 515 m, 14 June 2018 (fl.), Zhenji Li et al. AU 02680 (AU); • Hengfeng County, Mt. Zheting, 60 m, 23 April 2013 (fl.), Jianjun Zhou & Dasong Zhou 20130424 (CSFI); • Qianshan County, Wangcun Village, 14 October 2017 (fl. & fr.), Binjie Ge et al. CSH 21867 (CSH).

Impatiens platysepala var. chloroxantha — China. Fujian Province • Mt. Wuyi, 27°38'20"N, 117°57'7"E, 243 m, 1 July 2019 (fl.), Xiaohui Song 2936 (AU); • 3 May 2015 (fl.), Xiangxiu Su CFH 09011332 (CSH). Zhejiang Provinc • Lishui City, Suichang County, Mt. Jiulong, 600 m, 25 September 1989 (fl. & fr.), Yilin Chen 89-03 (PE); ibidem, 550 m, 21 August 1991, Xu 1234 (ZM); ibidem, 751.39 m, 5 June 2012 (fl.), Qi Tian et al. TQ 01758 (CSH); • Hangzhou City, Lin’an District, Mt. Longtang, 850 m, 27 June 1981 (fl.), Chunsheng Xiang 0020 (HTC); Hubei Province • Shennongjia National Park, QianjiaPing, 6 August 2010 (fl.), Jinyu Li et al. SN 0079 (BJFC).

Impatiens wuyiensis — China. Fujian Province • Wuyishan City, Yangzhuang Town, Longguiyuan Scenic Area, 27°51'07"N, 117°53'05"E, 519.9 m, 18 July 2021 (fl.), Jingyi Wang 136 (AU); ibidem, 27°51'10"N, 117°53'14"E, 527 m, 18 July 2021 (fl.), Tao Wei 993 (AU).