Revision of Chassalia (Rubiaceae-Rubioideae-Palicoureeae) in Borneo, with 14 new species Yu, Tian Yi Turner, Ian M. Cheek, Martin European Journal of Taxonomy 2021 2021-03-09 738 1 60 I. M. Turner I. M. Turner. Among 2021 [506,958,1180,1208] Magnoliopsida Rubiaceae Chassalia Plantae Gentianales 51 52 Tracheophyta species psychotriformis nom. nov.  Replaced synonym:   Cephaelis psychotrioidesValeton, Icones Bogorienses4 (3): t. 357 ( Valeton 1913b). –  Chassalia psychotrioides(Valeton) I.M.Turner, Feddes Repertorium139: 399 ( Turner 2019), nom. illegit., non  Chassalia psychotrioidesDC.,  Prodromus Systematis Naturalis Regni Vegetabilis4: 531 (1830) ( Candolle 1830). –   Type: INDONESIA• Borneo, Liang Gagang; 1893–1894;  Hallier2703; hololectotype:BO[BO-1374040], designated by  Turner(2019: 399); isolectotype: BO[BO-1374039].   Additional material   MALAYSIA– Borneo, Sarawak• Serian, Gunong Penrissen;  2 May 1962;  Ilias Paie S 16336; K!, L, SAR•  Serian, Tebedu, Bukit Simurus;  12 Feb. 1985; Abg. Mohtar S 49281; K!, SAR• 2 nd Division, Lubok Antu District, Lanjak-Entimau P. F., Sg. Jelok, near Bukit engkajang;  18 Mar. 1974; Paul Chai S 34024; K!, L, KEP, MO, SAN, SAR•   INDONESIA• Borneo, Jaro Dsm,  10 km NEof Muara Uya, Kalimantan Selatan; alt.  90 m;  16 Nov. 1971; Kuswata Kartawinata 828; K!, L.    Description Shrub to small tree, 1–1.5 mtall. Stem terete, central part slightly canaliculate when dry, hairy from the first or second internode from apex. Internodes 1.5–8 cm× 4 mm. Leaf-blades obovate to elliptic, 20.5–28.5 × 5.5–8 cm, apex acute to acuminate, base truncate, adaxial surface glabrous, abaxial surface hairy, midrib slightly raised on both sides, densely hairy abaxially, petiole 2–5.5 cmlong, young petiole hairy, glabrescent. Stipule flabellate, apex usually broken, 3–8 × 5–10 mm, slightly hairy when young. Inflorescence a compound cyme, 7 cmlong, all parts hairy except fruits; peduncle 4 cmlong, bracts of peduncle stipule-like, 1 × 5 mm, first branches and first internode of rachis 2–2.5 cmlong, bracts of first branches and first internode of rachis 2, 4–6 × 1–2 mm, second branches and second internode of rachis 3.1 cmlong, bracts of second branches and second internode of rachis 2, slightly smaller than bract of first branches and first internode of rachis, 2 × 2 mm, bracts of capitulum 2–3 × 2 mm. Flowers not seen. Fruits 8–10 × 4–9 × 4–6 mm, blackish brown when dry, calyx persistent, not accrescent, 0.4 × 2 mm, disc persistent, not accrescent, 0.5 × 1 mm. Pyrenes plano-convex, 8–9 × 4–9 × 4–6 mm, dorsal surface convex, with two adjacent parallel longitudinal crests, 0.5 mmwide, 0.25 mmapart along their length, forming a longitudinal groove from apex to base between the two crests; ventral surface concave, central part slightly elevated, margin with an endocarpal outgrowth 1–1.2 mmwide, with a groove between the edge of endocarp and endocarpal outgrowth 0.5 mmwide. Raphal opening, bony spine, PGS, seed and endosperm not detected.    Distribution Borneo: West Kalimantan, Bukit Liang; Sarawak, First Division, Serian, Gunung Penrissen.    Remarks  Turner (2019)transferred  Cephaelis psychotrioidesValetonto  Chassalia. The resultant new combination was illegitimate, being a later homonym of  Chassalia psychotrioidesDC., a species from Mauritius. Therefore a nomen novum is here published for Valeton’s name for the Bornean species. Valeton’s typespecimen Hallier 2703(BO-1374040) has a hairy infructescence. Additional information provided by the drawing included in the original publication of this species also shows that it has hairy petioles and abaxial leaf midribs ( Valeton 1913b). The species differs from other Asian species of  Chassaliaby having a hairy petiole, lower midrib and secondary nerves of the leaves, also the stem apices and inflorescences are densely pubescent.   Chassalia psychotriformisis restricted to a region straddling the Sarawak-Kalimantan border in Borneo based on specimen records from K and other herbaria. The most distinctive vegetative character of  C. psychotriformisis the pubescent abaxial surface of the leaves and the pubescent peduncles. It is the only species that has been found with a hairy peduncle among all Asian species of  Chassalia. Therefore, the identification of  C. psychotriformisis not difficult compared to that of most other Bornean species of  Chassalia. 3050815311 Indonesia Liang Gagang Borneo 51 52 1 type 3050815322 S 16336 1962-05-02 K, L, SAR Malaysia Serian Ilias Paie Gunong Penrissen 51 52 1 Sarawak 3050815333 S 49281 [276,1219,1572,1599] 1985-02-12 K, SAR Malaysia Serian Bukit Simurus Tebedu 51 52 1 Borneo 3050815367 S 34024 1974-03-18 P, F, K, L, KEP, MO, SAN, SAR Sg. Jelok Malaysia Division Lanjak-Entimau Lubok Antu District 51 52 1 Borneo 3050815354 1971-11-16 NE, K, L Indonesia Borneo 90 Muara Uya Jaro Dsm 51 52 1 Kalimantan Selatan