e-Flora of Thailand

Volume 15 > Part 1 > Year 2021 > Page 136 > Rubiaceae > Scleromitrion

11. Scleromitrion verticillatum (L.) R.J.Wangwfo-0001341324

J. Trop. Subtrop. Bot. 22: 440. 2014.— Oldenlandia verticillata L., Syst. Nat. ed. 12, 2: 126. 1767, Mant. Pl.: 40. 1767; Fosberg & Sachet, Allertonia 6: 210, 242. 1991.— Hedyotis verticillata (L.) Lam., Tabl. Encycl. 1: 271. 1792; Craib, Fl. Siam. 2: 51. 1932; Yamazaki in Hara, Fl. E. Himal. 1: 310. 1966; Fukuoka in S.E. Asian Stud. 8(3): 322. 1970; Tao Chen & C.M.Taylor in Z.Y.Wu et al., Fl. China 19: 172. 2011; R.J.Wang in K.M.Wong et al., Fl. Singapore 13: 127. 2019.


Accepted Name : This is currently accepted.



Synonyms & Citations :

Hedyotis hispida Retz., Observ. Bot. 4: 23. 1789; Roxb. Fl. Ind. 1: 368. 1820; Hook.f., Fl. Brit. India 3: 60. 1880; King & Gamble in Journ. Asiat. Soc. Beng. 72(2): 166. 1903; Ridl., J. Straits Branch Roy. Asiat. Soc. 59: 109. 1911; Fl. Malay Penins. 2: 52. 1923; Ratna Dutta & Deb, Taxon. Revis. Hedyotis L. (Rubiac.) Indian Subcont.: 172. 2004.— Oldenlandia hispida (Retz.) Lam., Tabl. Encycl. 4: 536. 1798; Craib, Bull. Misc. Inf. Kew 1912: 101. 1912; Pit. in Lecomte, Fl. Indo-Chine 3: 109, fig. 11. 1922.— Scleromitrion hispidum (Retz.) Korth. in Nederl. Kruidk. Arch. 2: 155. 1851; Miq. Fl. Ned. Ind. 2: 185. 1857; Kurz, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 46(2): 137. 1877.
Hedyotis hirta Ridl., Bull. Misc. Inform. Kew 1926: 472. 1926; Fukuoka in S.E. Asian Stud. 8(3): 314. 1970.


Description : Annual or perennial herbs, 10–20 cm tall procumbent; stems quadrangular, ribbed and grooved, hispid. Stipules sheath truncate, with 5–11 bristles, hispid. Leaves elliptic or narrowly elliptic (1.3–)2.5–6 by (0.2–)0.5–1.2 cm, subcoriaceous, base cuneate, apex acute, margin revolute, scabrous above, hispid beneath, lateral veins 4–6 pairs, indistinct; petiole 0–1 mm long. Inflorescences axillary, capitate, with 4–16 flowers. Flowers white, tubular, homostylous, pedicels ca 0.5 mm long. Calyx tube 0.5–0.8 mm long; lobes deltoid, 1.8–2.2 by 0.6–0.8 mm, erect, margin hispid. Corolla tube 2–3 mm long; lobes oblong, 2.2–2.8 by 0.5–0.6 mm, apex acute, outside hispid at apex, inside glabrous. Stamens exserted from corolla tube; filament 2–2.2 mm long; anthers white, oblong, 0.8–1 by 0.2–0.3 mm. Ovary hispid; style 4.5–5 mm long, glabrous, exserted from corolla tube; stigma ca 0.5 mm long. Capsules globose or ovoid, ca 2.5 mm by 2–2.5 mm, widest at middle of capsule, hispid, persistent calyx convergent. Seeds 40–60 per locule, 0.2–0.3 by 0.2–0.3 mm.


Thailand : NORTHERN: Mae Hong Son (Pang Ma Pha, San Ban Dan WS), Chiang Mai (Doi Chiang Dao, Doi Inthanon, Doi Pha Hom Pok, Mae Pan Falls), Chiang Rai, Nan (Doi Phu Kha), Lampang (Doi Khun Tan NP, Hang Chat), Uttaradit (Phu Soi Dao), Phitsanulok (Thung Salaeng Luang NP); NORTH-EASTERN: Loei (Phu Kradueng), Nakhon Phanom (Phu Langka NP); EASTERN: Chaiyaphum (Nam Phrom); SOUTH-WESTERN: Kanchanaburi (Ban Kao); SOUTH-EASTERN: Chanthaburi; PENINSULAR: Phangnga ( type of Hedyotis hirta: Haniff & Nur SF 3871 -K SING).


Distribution : India, Bhutan, Nepal, Bangladesh, S China, Myanmar, Laos Vietnam, Cambodia, Malay Peninsula including Singapore, Indonesia (Amboina, Java – type), the Philippines, S China.


Ecology : Evergreen forests, deciduous forests, open places or shaded areas, 50–1,400 m alt. Flowering: August–March.


Vernacular : Tong haeng hin (ตองแห้งหิน)(Peninsular).


Notes: This species is distinguished by the hispid stems and capsules.


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