Styrax chrysocarpus H.L. Li (1944: 312), H. L. Li, 1944

Zhang, Rui, Zhao, Wan-Yi, Liu, Yu-Lin, Fan, Yu & Tang, Ming, 2021, Rediscovery of Styrax buchananii and S. chrysocarpus, with supplemental descriptions adding fruit and floral characters, respectively, Phytotaxa 479 (2), pp. 173-182: 179-181

publication ID

http://doi.org/ 10.11646/phytotaxa.479.2.3

persistent identifier

http://treatment.plazi.org/id/4137F460-FF8B-FFB8-FF54-ED6140C7FEAF

treatment provided by

Marcus

scientific name

Styrax chrysocarpus H.L. Li (1944: 312)
status

 

Styrax chrysocarpus H.L. Li (1944: 312)   . Figs. 1B View FIGURE 1 , 2B, D View FIGURE 2 , 5–6 View FIGURE 5 View FIGURE 6 .

TYPE:— China. Yunnan, Pingbian Miao Autonomous County, 1400 m, 9 July 1934   , H. T. Tsai 62505 (holotype,   A00018412!; isotypes,   IBSC0454257 View Materials !,   KUN, LBG00098686 View Materials !,   NAS00072204 View Materials !,   PE00027899!)   .

Trees 6–13 m tall. Young branchlets yellow-brown-stellate-tomentose; older branchlets dark brown, subglabrous. Petiole 5–10 mm long, densely yellow-gray-stellate-pubescent. Lamina 6–21 × 3.5–12 cm, chartaceous, oblongovate to oblong, base rounded or broadly cuneate, apex acute to slightly acuminate; adaxially sparsely yellow-graystellate-pubescent and abaxially densely yellow-gray-stellate-hirsute, prevalent on veins; margin subentire or remotely irregular serrulate apically; secondary veins 5 to 8 on each side of midvein, adaxially plane or slightly sunken, abaxially prominent; tertiary veins reticulate, parallel and perpendicular to secondaries, abaxially prominent. Fertile shoots 10–20 cm long, 3- or 4-leaved. Inflorescences arising from shoots of current growing season; lateral inflorescences racemose, 2–5 cm long, 2- to 5-flowered, often with 1 or 2 flowers occurring in same leaf axil; pseudoterminal inflorescences usually paniculate, sometimes racemose, 4–11 cm long, 4- to 10-flowered, lateral branches 0 to 3, sometimes with 2 or 5 short lateral racemes from base of inflorescence, rachis and branches densely yellowstellate-pubescent. Pedicel (3–) 4–7 mm long, densely yellow-stellate-hirsute; bracteoles ca. 2 mm long, linear, usually positioned at base of pedicels. Flowers 1.5–1.7 cm long. Calyx 4–5 × 4–5 mm, cupuliform, swollen at base, adaxially yellowish-white-appressedpubescent with 2- or 3-armed or stellate trichomes, somewhat scarious, brown when dry, margin truncate, undulate, or irregularly lobed, teeth minute and not contiguous if present. Corolla 1.1–1.4 cm long, white, tube ca. 3 mm long, glabrous, lobes 5(6), 10–12 × 4–5 mm, lanceolate or ovate-lanceolate, stellate-tomentose on both sides. Stamens 10, rarely 12; filaments ca. 5 mm long, straight, distally attenuate, densely white- to yellow-stellate-hirsute throughout; anthers ca. 5 mm long, wider than distal portion of filament; connectives densely stellate-hirsute. Style densely white- stellate-hirsute from base to middle, upper subglabrous; stigma 0.2–0.3 mm wide, punctiform. Infructescences arising from shoots of current growing season, 1- to 5-fruited, yellow-stellate-tomentose. Fruiting pedicel 4–5 mm long. Fruiting calyx 5–6 × 10–15 mm, cupuliform, brown, margin not appressed to fruit, glabrous adaxially, densely stellatepubescent abaxially; margin irregularly 6- or 8-crenately lobed, lobes ca. 3 × 6 mm broad. Fruit 1.6–1.8 × 1.0– 1.2 cm, ovoid, apex shortly pointed, apparently indehiscent; pericarp dry, 0.3–0.5 mm thick, outside golden yellow-stellatetomentose, inside densely pale yellow-appressed-pubescent. Seeds dull dark brown, 1.5–1.6 × 1.0– 1.1 cm, ovoid, smooth, glabrous.

Distribution and habitat: — Styrax chrysocarpus   is endemic to Yunnan Province (Guangnan, Malipo and Pingbian counties), China ( Fig. 6 View FIGURE 6 ). It grows by the road or in ravine forests at elevations of 1400–1700 m.

Phenology: —Flowering from April to May; fruiting from August to September.

Conservation status: —From our observations, the Malipo population comprises no more than 30 plants within a radius of 3 km. For the type locality of Styrax chrysocarpus   is not determined as a nature reserve, it is at risk of being cut for firewoods because it close to villages which are only about 15 km away from the forest, thus we recommend it be categorized as EN (endangered) under criteria B2b following IUCN Red List categories ( IUCN Standards and Petitions Subcommittee 2019).

Additional specimens examined: CHINA, YUNNAN: Kwang-nan [Guangnan County], specific locality not indicated, 1550 m, 14 March 1940, C. W   . Wang 87834 ( KUN); Malipo County, Tiechang Xiang, 1472 m, 3 May 2013, C. L   . Xiang et al. 577 ( KUN); Same locality as prior one. E   . D. Liu et al. LiuED6087 ( KUN); Same locality as prior one. 1400–1700 m, 22 July 2020, R   . Zhang et al. zrr2 ( JXAU); Pingbian County, specific locality not indicated, 1400 m, 9 July 1934, H. T   . Tsai 62522 ( A, KUN, LBG, PE, paratypes); Pingbian County, specific locality not indicated, 1500 m, 11 July 1934, H. T   . Tsai 62766 ( A, IBSC, KUN, PE, paratypes)   .

Notes: — Hwang (1987) presumed to place Styrax chrysocarpus   in S. ser. Imbricatae Perkins (1907: 18) because of its similarity of other characters to those species within the series. Huang et al. (2003) further treated S. chrysocarpus   in S. series Cyrta   , a series with imbricate or subvalvate corolla lobes in bud according to the infrageneric treatment of Styrax   by Fritsch (1999). Our study of the flower material of the species shown that the corolla of S. chrysocarpus   is imbricate in bud, confirming the infrageneric placement of the species by Hwang (1987) and Huang et al. (2003). S. chrysocarpus   is currently known only from southeastern Yunnan. The species identification of a collection with neither flowers nor fruits, and with a disjunct distribution from Yongshan County, Yunnan, i.e. H.T. Tsai 51156 (KUN), which Huang et al. (2003) tentatively cited as S. chrysocarpus   , is in doubt because its leaves adaxially and petiole are covered with sparse gray-white pubescence (vs. dense yellow-gray-stellate pubescence in S. chrysocarpus   ) and its tertiary veins abaxially are not prominent (vs. prominent in S. chrysocarpus   ). This collection needs further field investigation to better understand its identity.

H

University of Helsinki

T

Tavera, Department of Geology and Geophysics

KUN

Kunming Institute of Botany, Chinese Academy of Sciences

C

University of Copenhagen

W

Naturhistorisches Museum Wien

L

Nationaal Herbarium Nederland, Leiden University branch

E

Royal Botanic Garden Edinburgh

R

Departamento de Geologia, Universidad de Chile

JXAU

Jiangxi Agricultural University

A

Harvard University - Arnold Arboretum

LBG

Institute for Agricultural Bacteriology and Fermentation Biology

PE

Institute of Botany, Chinese Academy of Sciences

IBSC

South China Botanical Garden

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Ericales

Family

Styracaceae

Genus

Styrax

Loc

Styrax chrysocarpus H.L. Li (1944: 312)

Zhang, Rui, Zhao, Wan-Yi, Liu, Yu-Lin, Fan, Yu & Tang, Ming 2021
2021
Loc

Styrax chrysocarpus H.L. Li (1944: 312)

Li, H. L. 1944: )
1944