Stephania rotunda Loureiro (1790: 608) emend. Hul et al.

Hul, Sovanmoly, Dary, Chhavarath, Jacques, Frederic, Ollivier, Evelyne, Bun, Sok-Siya & Jabbour, Florian, 2014, Lecto- and epitypification of Stephania rotunda (Menispermaceae), Phytotaxa 172 (2), pp. 133-136 : 134-135

Stephania rotunda Loureiro (1790: 608) emend. Hul et al.

Lectotype (designated here):— VIETNAM. “Cochinchinae”, J. de Loureiro s. n. ( BM!, BM000554372 , isolectotype: BM!, BM000554373 ) ( Fig. 1A, B ).

Epitype (designated here):— CAMBODIA, Kampot (as ‘Kamput’), May 1874, J. B. L. Pierre 755a ( P!, P02384051 ) ( Fig. 2 ) .

= Cocculus roxburghianus de Candolle (1817: 516) . Type:— INDIA. W. Roxburgh s.n. (holo-, K).

= Cissampelos glabra Roxburgh (1832: 840) . Type:— BANGLADESH. Sylhet, Roxburgh Icon 2410 (lecto-, designated here, K).

= S. rotunda auct., non Loureiro: W.J. Hooker & Thomson (1855: 197), p. p.

= S. glabra (Roxburgh) Miers (1866: 14) .

Plant dioecious. Slender climber with colorless sap, glabrous, from a large exposed tuber up to 40–50 cm in diam.; tubers of old plants interconnected; stems striate, up to 10–12 m long.

Leaves simple; petioles 6–25 cm long, glabrous, geniculate and thickened at base; blades triangular-suborbicular, broadly triangular-ovate or broadly ovate, (4–)9–15(–25) × (3–)5–12(–20) cm, with rounded-truncate or slightly cordate bases, acute or obtuse, ± acuminate apices, entire or sometimes slightly lobed margins, palmately nerved, submembranous, upper and lower surfaces ± papillose, lower surface glaucous. Male inflorescences axillary, umbelliforme cymes, glabrous, pedunculate, sometimes on leafless old stems, 3–12 cm long. Male flowers pedicellate; pedicels 2–3 mm long. Sepals 6, greenish-yellowish, glandular, outer 3 linear-oblong or narrowly obovate, 1.5–2.5 × 0.5–1.0 mm, inner 3 obovate or spatulate, ± unguiculate, 1.5–3.0 × 0.5–1.0 mm. Petals (2–)3, orange, fleshy, obovate or suborbicular, 1–2 × 1 mm, sometimes with 2 inner glands. Synandrium on stalk 1.5–2.0 mm long. Female inflorescences axillary, much more condensed than the male. Pedicels fleshy, 2.5–4.0 mm, becoming 6–8 mm in fruit. Sepals 1(–2), ± obovate or elliptic, ± glandular, 1.0–1.5 × 0.5–1.0 mm. Petals 2(–3), suborbicular, ± glandular, 1.0 × 0.5–1 mm. Carpel subovoid, 1.0 × 0.5 mm, with a 2 to 7-fid stigma. Drupes obovoid, 5–6 mm long; endocarp perforate, abaxially bearing 4 rows of 13–17 hooked projections.

Distribution: India, Nepal, Bangladesh, China, Myanmar, Thailand, Cambodia, Laos, and Vietnam.

Remarks: Jean Baptiste Louis Pierre attributed the collection number 755 to six specimens. We determined four of them as Stephania pierrei (three specimens were collected in June 1870 in Pursat, and one in May 1874 in Kampot), one as S. glabra (May 1874, Kampot), and a last one as S. oblata Craib (1922: 230) (May 1874, Kampot). To distinguish the two latter herbarium sheets from the other Pierre 755 specimens, we added to their collection number the letters a and b, respectively. Accordingly, the specimens of S. pierrei collected in Pursath and in Kampot are Pierre 755c and 755d, respectively.

The specimens Pierre 755 were cited as syntypes in the protologue of Stephania pierrei Diels. According to the article 9.14 of the ICN ( McNeill et al. 2012), the species name should stay attached to the specimen that corresponds most closely with the original diagnosis. As stated here, the specimen Pierre 755a corresponds to S. glabra , so it cannot be considered a syntype of S. pierrei and hence can be used for an epitypification purpose.

Finally, Forman (1988: 384) considered the “type” of Stephania glabra to be “ Roxburgh Icon 2410” housed at the Royal Botanic Garden, Kew. As this was an ineffective declaration of a lectotype, we here establish formally his lectotype.

Figures

FIGURE 1.The lectotype and isolectotype of Stephania rotunda. Vouchers: Loureiro s.n. Barcodes: A, BM000554372; B, BM000554373. Images reproduced with permission from the Natural History Museum, London.

FIGURE 2. The epitype chosen for Stephania rotunda. Voucher: Pierre 755a. Barcode: P02384051. A high-resolution image can be obtained using P online public database (http://science.mnhn.fr/institution/mnhn/collection/p/item/p02384051).