Bergera microphylla (Merr. & Chun) F.J.Mou, 2023

Mou, Feng-Juan, Hu, Xiu, Ha, Bui Thu & Cuong, Nguyen Manh, 2023, Taxonomic revision of Bergera J. Koenig ex L. (Rutaceae) based on the molecular phylogeny and morphology, European Journal of Taxonomy 860, pp. 141-180 : 166-168

Bergera microphylla (Merr. & Chun) F.J.Mou , comb. nov.

urn:lsid:ipni.org:names:77314676-1

Fig. 10

Clausena microphylla Merr. & Chun, Sunyatsenia 2: 251, fig. 27 ( Merrill & Chun 1935). – Murraya microphylla (Merr. & Chun) Swingle , Journal of the Washington Academy of Sciences 32 (1): 26 ( Swingle 1942). – Type: CHINA • Hainan, Xincun (Sun Chue); 21 Jul. 1932; N.K. Chun & C.L. Tso 43323; lectotype: IBSC[0409335]!; isolectotypes: IBSC[0409328, 0001859, 0409330]!, IBK[IBK00108120]!, SYS[SYS00095204]!, K[K000736100] image!, P[MNHN-P-P06638005] image!, B[B100296006] image!,A[A00044115] image!, US [ US 00101714] image!, NY[NY00399952] image!. Designated here.

Etymology

The specific epithet refers to the small leaflets.

Material examined

CHINA • Hainan Province, Lingshui ; 21 Jul. 1932; N. K. Chun & C. L. Tso 43323; IBCS!, IBK!, SYS!, K image!, P image!, B image!, A image !, US image!, NY image ! • 16 Oct. 1935; K. Z. Hou 73825; IBSC ! • 11 May 1983; Nanwanling; G. A. Fu 3570; IBSC ! • 11 Sep. 1986; Q. Li 265; SYS ! • Dongfang ( Gan’en ); 20 Aug. 1936; X. Q. Liu 27726; IBK!, IBSC!, PE image ! • Changjiang ; 25 Apr. 1975; G. A. Fu 0502; IBSC!, SZ image ! • Ledong, Jianfengling ; 11 May 1964; H. S. Lin 269; IBSC ! • Sanya ; 24 Jun. 1933; K. Z. Hou 70882; IBSC!, PE image!, NAS image!, SZ image ! • 4 Jul. 1933; X. R. Liang 61885; IBK!, IBSC!, KUN!, PE image ! • Z. Huang 32740; IBK!, IBSC! • 30 Aug. 1933; Z. Huang 33795; IBK!, IBSC ! • Jul. 1964; P. Y. Huang 386; SYS ! • 17 Oct. 1984; Q. Li 156; SYS ! • 8 Sep. 1986; Q. Li 248; SYS ! • 1 Aug. 1987; Q. Li 248; SYS ! • Wanning ; 8 Apr. 1984; Z. X. Li et al. 1786; IBSC ! • 28 May 1988; Z.X. Li et al. 4690; IBSC ! • 2008; F. J. Mou 163; IBSC ! • 19 Sep. 2016; F. J. Mou 528; SWFC ! • Guangdong Province, Xuwen ; D. Liang et al. WP136; IBSC !.

Description

Shrubs or small trees, up to 6 m. Branches are glabrous; branchlets with a dispersed white pubescence. Leaves 11–21-foliolate; petiolules extremely short; petiole and rachis with scattered white pubescence of short curved hairs; leaflet blades suborbicular to ovate to elliptic, 3–20 × 3–6 mm, glabrous, base usually inequilateral, margin crenate, and apex rounded to obtuse. Inflorescences are terminal, 10–30-flowered. Flower buds are 4–5 × 2.5 mm; flowers 5-merous, white, and fragrant; sepals ovate-elliptic, ca 1 mm, persistent in fruits; petals in bud 4–5 mm scattered with large and very dark oil glands. Stamens are as long as the pistil, with linear subulate filaments. Disks are very short. Pistils 4 mm long; ovaries 1.2–1.5 mm long, 0.9–1 mm wide, 1- or 2-loculed, and with 1 or 2 large oil glands at the top of the locule; styles 3 × 0.4–0.5 mm; stigmas subcapitate, 0.7–0.9 mm diam. with a few small oil glands. Fruits are ellipsoid to ovoid-ellipsoid, up to 1 cm.

Phenology

Flowering between April and May, while fruiting from July to October.

Distribution and habitat

China: Hainan (Sanya, Lingshui, Wanning, Changjiang, Ledong, and Dongfang). Growing in thickets on the sand near beach.

Remarks

This species is very close to B. koenigii on some flower and fruit morphological traits, but with much smaller leaflets.

Figures

Fig. 10. Bergera microphylla (Merr. & Chun) F.J.Mou comb. nov. A–C. Plants. D–E. Infructescence. F. Ovary crossection. Photos taken by Feng-Juan Mou and Dan Liang in China.