Sedum kuntsunianum X.F.Jin, S.H.Jin & B.Y.Ding, 2013
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publication ID |
https://doi.org/ 10.11646/phytotaxa.105.2.1 |
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persistent identifier |
https://treatment.plazi.org/id/03B487BB-FFD5-FFBA-FF28-781D4828F2C7 |
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treatment provided by |
Felipe |
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scientific name |
Sedum kuntsunianum X.F.Jin, S.H.Jin & B.Y.Ding |
| status |
sp. nov. |
Sedum kuntsunianum X.F.Jin, S.H.Jin & B.Y.Ding View in CoL , sp. nov. ( Figure 1 View FIGURE 1 )
The new species is similar to Sedum makinoi Maxim. , but differs in having basal leaves persistent, decussate, sterile stems creeping, paired in the axils of basal leaves, sepals 5–9 mm long, petals 7–8 mm long. In S. makinoi , basal leaves are deciduous and absent, sterile stems erect or ascending, sepals 2–3 mm long, and petals 4–5 mm long.
Type: — CHINA. Zhejiang Province: Wencheng County, Shiyang Township, Shiyang Forestry Farm , Sanzhuangkeng , on stones by farmland, elevation ca. 800 m, 16 May 2005 (fl.), X. F . Jin & X. M . Yang 1808 (holotype HTC!, isotype HTC! & ZM!) .
Herbs perennial, 8–12 cm tall. Roots fibrous; basal nodes with fibrous adventitious roots. Basal leaves decussate, blade elliptic, widely ovate to subcircular, 10–40 × 11–30 mm, obtuse at apex, cuneate and shortly spurred at base, contracted into short petiole (3–7 mm). Sterile stems creeping, paired in the axils of basal leaves; leaf blade widely obovate or suborbiculate, 14–20 × 9–15 mm, obtuse at apex, cuneate and shortly spurred at base. Flowering stems erect or ascending; leaves opposite, or rarely alternate at base; blade suborbiculate or spatulate, 10–20 × 6–12 mm, obtuse at apex, cuneate and shortly spurred at base. Cyme 2- or 3-branched, scorpioid, 3–7 cm in diam., many-flowered; bracts frondose, but smaller than foliage leaves, 11– 17 × 6–10 mm, obtuse at apex, cuneate and shortly spurred at base. Flowers 5-merous, sessile. Sepals 5, oblong to linear, unequal in length, 5–9 × 1–1.5 mm, obtuse at apex, cuneate and shortly spurred at base. Petals 5, yellow, lanceolate, slightly longer, or rarely shorter than sepals, 7–8 × 1.5–2 mm, acuminate at apex. Stamens 10; antesepalous ones ca. 6 mm long; antepetalous ones ca. 5 mm long, inserted ca. 1 mm from petal base; anthers ovoid, reddish yellow. Nectar scales 5, ovate-spatulate, ca. 0.5 mm long. Carpels 5, lanceolate, ca. 5 mm long, connate for ca. 1 mm long at base; styles ca. 1 mm long. Follicles divergent, many-seeded. Seeds minute, oblong-ovoid, reddish brown.
Distribution & Habitat: —Endemic to China, with an apparently narrow geographic distribution. This species is known only from Shiyang Township of Wencheng County, and Huangqiao Forestry Farm of Taishun County, South Zhejiang (see Figure 3 View FIGURE 3 ). It grows in moist places in valleys, on rocks and along road banks, at an elevation of ca. 450–850 m a.s.l. Flowers and fruits were collected in May.
Etymology: —This species is named in honor of Professor Kun-Tsun Fu (1912–2010), who devoted his life to the study of Chinese Sedum (Crassulaceae) , Astragalus L. ( Fabaceae ), and Pleurospermum Hoffm. (Apiaceae) .
Additional collections (paratypes): — CHINA. Zhejiang Province: Taishun County, Huangqiao Forestry Farm, Qiaoxiakeng, roadside, elevation ca. 560 m, 4 May 1990, G. Y . Li & al. 669 ( ZM!); the same locality, along valley under forest, elevation ca. 450 m, 4 May 1990, G. Y . Li & al. TH030 ( ZJFC!). Wencheng County, Shiyang Township, Shiyang Forestry Farm , Sanzhangkeng, on stones along roadside, elevation ca. 850 m, 16 May 2007, X. F . Jin & X. M . Yang 1802 ( HTC!), 1809 ( HTC!), 1810 ( HTC!) .
Similar species: — Sedum kuntsunianum belongs to S. sect. Sedum , characterized by yellow petals, spurred leaf bases, and carpels and follicles that are gibbous adaxially ( Fu et al. 2001). It is most similar to S. makinoi in its opposite leaves with obtuse apices, and sepals and leaves that are spurred at base, but it can be easily distinguished from this similar species by the characters described in Table 1.
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