e-Flora of Thailand

Volume 15 > Part 1 > Year 2021 > Page 61 > Rubiaceae > Hedyotis

8. Hedyotis kurzii Merr.wfo-0000980475

Pap. Michigan Acad. Sci. 19: 195. 1934 (‘1933’).


Accepted Name : This is currently accepted.



Synonyms & Citations :

Hedyotis galioides Wall., Numer. List: 866. 1829, nom. nud. [non H. galioides F. Muell., 1863].
Hedyotis wallichii Kurz, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 45: 136. 1876, nom. illeg. [non H. wallichii Walp., 1843]; Craib, Fl. Siam. 2: 52. 1932; Fukuoka, S.E. Asian Stud. 8(3): 331. 1970.— Oldenlandia wallichii (Kurz) Craib, Bull. Misc. Inform. Kew 1911: 388. 1911.— O. wallichii (Kurz) Pit. in Lecomte, Fl. Indo-Chine 3: 120. 1922, isonym.— Oldenlandia wallichii (Kurz) Pit. in Lecomte, Fl. Indo-Chine 3: 120. 1922, isonym.— Oldenlandia wallichii (Kurz) Pit. in Lecomte, Fl. Indo-Chine 3: 120. 1922, isonym.— Oldenlandia wallichii (Kurz) Pit. in Lecomte, Fl. Indo-Chine 3: 120. 1922, isonym.
Oldenlandia rosea Ridl., J. Straits Branch Roy. Asiat. Soc. 59: 110. 1911; Fl. Malay Penins. 2: 54. 1923.
Hedyotis nicobarensis W.H.Lewis, Ann. Missouri Bot. Gard. 53: 109. 1966, nom. illeg. superfl.


Description : Annual herbs 10–70 cm tall; stems erect, quadrangular, fringed on ribs. Stipules adnate with petiole, sheath linear, dark brown colleter attach at sinus of leaves and stipules. Leaves elliptic or elliptic-lanceolate, (8–)15–40 by (2.5–)4–12(–15) mm, base acute, apex acute, chartaceous, pubescent on both surface, lateral veins 2 pairs, inconspicuous; sessile. Inflorescences terminal, branched cymose, ultimate branch a monochasial cyme; peduncle glabrous. Flowers white or pink, tubular; pedicel 4–15 mm long, glabrous. Calyx connate at base; lobes ovate-lanceolate, 0.6–1 mm long, apex acute, glabrous, sinus somewhat 1–2 colleters. Corolla tube 1–1.5 mm long; lobes ovate-lanceolate, ca 1 mm long, apex acute, outside glabrous, inside pubescent between middle and mouth of corolla tube. Stamens: filaments 0.4–0.5 mm long, glabrous; anthers oblong, 0.3–0.5 mm long. Ovary pubescent; style 1.3–1.5 mm long, glabrous; stigma 0.7–0.8 mm long. Capsules septicidally and then loculicidally dehiscent, spheroidal, 1.5–2 by 1.5–2 mm, pubescent. Seeds 14–20 per locule, 0.3–0.4 by 0.2–0.35 mm.


Thailand : NORTHERN: Mae Hong Son, Chiang Mai (Doi Suthep-Pui NP), Chiang Rai, Phitsanulok (Thung Salang Luang NP); NORTH-EASTERN: Sakon Nakhon (Phu Phan NP); EASTERN: Nakhon Ratchasima (Khao Yai NP); CENTRAL: Saraburi, Nakhon Nayok (Sarika Falls, Khao Yai NP); SOUTH-EASTERN: Trat (Ko Chang, Khao Saming); PENINSULAR: Ranong (Kapoe), Krabi (Khlong Thom), Trang, Songkhla.


Distribution : India, Andaman Islands, Myanmar (type), Vietnam, Malay Peninsula (type of Oldenlandia rosea), Borneo.


Ecology : Grass fields, open places, to 700 m alt. Flowering: August–April.


Vernacular : Ya foi fon (หญ้าฝอยฝน).


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