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| Hemilophia cardiocarpa Huan C. Wang, Shao Y. Liu & Z. T. Ren, in Liu, Ren, Zhao, Hu & Wang, 2022. |
Abstract
Hemilophia cardiocarpa (Brassicaceae), the sixth species of the Chinese endemic genus Hemilophia, is described and illustrated. This plant is found in the Jiaozishan Mountains in Dongchuan District, northern Yunnan, southwest China. Morphologically, it shows close relationships with H. rockii and H. pulchella, but differs from it in the leaf shape and size, inflorescence, flower size, shape of fruit and length of its pedicel. An updated key to the taxa of Hemilophia is provided.
Keywords: Alpine flora, Cruciferae, endemism, Hemilophia rockii, Jiaozishan Mountains
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| Hemilophia cardiocarpa Huan C. Wang, Shao Y. Liu & Z. T. Ren. A habit B a portion of stem showing trichomes C cauline leaf D flower (apical view) E petal F median filament G lateral filament H fruit (front view) I fruit (lateral view) J fruit after removal of valves and seeds K seed. |
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| Hemilophia cardiocarpa Huan C. Wang, Shao Y. Liu & Z. T. Ren. A–C habit D a portion of stem with two cauline leaves E inflorescences in apical view F flower G fruit (front view) H fruit (lateral view). |
Hemilophia cardiocarpa Huan C. Wang, Shao Y. Liu & Z. T. Ren, sp. nov.
Diagnosis: Hemilophia cardiocarpa is most similar to H. rockii, but clearly differs from the latter by its cauline leaves 5–8 mm long (vs. 3–6 mm long in H. rockii), 2–4 mm (vs. 1–3 mm) wide, pedicel of fruit shorter than or nearly equal to its leaflike bract (vs. significantly longer than leaflike bract) and fruit cordate (vs. spindle or narrowly oblong) in shape.
Etymology: The specific epithet cardiocarpa is derived from the Greek words “kardio” (heart) and “karpos” (fruit), referring to the fruit shape of this new species.
Vernacular name: Chinese Mandarin: xin guo ban ji ji (心果半脊荠).
Distribution and ecology: Hemilophia cardiocarpa appears to be a rare species endemic to the Jiaozishan Mountains, which are located in the northern Yunnan Province of southwest China with a highest elevation of 4344.1m and near to the Jinsha River. The new species grows on basaltic screes or open slopes at elevations ranging from 3900 to 4300 m, its association mainly include Arenaria weissiana Hand-Mazz. (Caryophyllaceae), Draba amplexicaulis Franch. (brassicaceaee), Scrophularia delavayi Franch.(Scrophulariaceae), Meconopsis integrifolia (Maxim.) Franch. (Papaveraceae), Ranunculus hirtellus var. orientalis W. T. Wang (Ranunculaceae) and Veronica szechuanica subsp. sikkimensis (Hook.f.) Hong (Plantaginaceae).
Shao-Yun Liu, Zheng-Tao Ren, Chang-You Zhao, Chun-Xiang Hu and Huan-Chong Wang. 2022. Hemilophia cardiocarpa (Brassicaceae), A New Species from Yunnan, southwest China. PhytoKeys. 194: 95-103. DOI: 10.3897/phytokeys.194.82737
