Volume 15 > Part 1 > Year 2021 > Page 59 > Rubiaceae > Hedyotis

5. Hedyotis garrettii Craibwfo-0000980370

Bull. Misc. Inform. Kew 1931: 220. 1931; Fl. Siam. 2: 41. 1932; Fukuoka, S.E. Asian Stud. 8(3): 336. 1970.

Accepted Name : This is currently accepted.

Description : Annual herbs 8–17 cm tall; stems erect, base simple, apex branched, quadrangular, slightly winged by 0.1 mm, glabrous, sparsely pilose. Stipules adnate with petiole, subulate or narrowly triangular, unlobed, 0.7–1.3 by 0.3–0.6 mm, margin with 1–5 colleters, short stalk as long as colleters. Leaves elliptic to narrowly elliptic, 0.4–1 by 0.1–0.3 cm, base cuneate, apex acute, sparsely pilose on both surfaces, lateral veins 1–2 pairs, sunken above, inconspicuous beneath; sessile. Inflorescences terminal and axillary on uppermost nodes, dichasial; peduncle sparsely pilose; bracts leaf-like, terminal flower bract 1–2, linear, stipules of bracts with yellow brown or dark brown colleters. Flowers white, pale violet or pink, cylindrical to slightly infundibular, terminal side flowers beared with bract; homostylous; pedicel 0.5–2 mm long, glabrous. Calyx connate at base; tubes ca 0.1–0.2 mm, lobes triangular, 0.5–0.7 by 0.4–0.5 mm, apex acute, erect, glabrous, sinuses with 0–2 colleters. Corolla tube 0.8–1.5 mm long; lobe ovate-oblong, 0.7–1 by 0.4–0.5 mm, apex acute, outside sparsely hirsute at mouth of corolla tube, inside glabrous, except mouth of corolla tube (often sparsely) tomentose. Stamens white, inserted under sinuses of corolla lobe; filaments short, ca 0.1 mm long, glabrous; anthers oblong, (0.15–)0.3–0.4 by 0.1–0.2 mm. Ovary hirsute; style 0.6–0.8 mm long, glabrous; stigma linear, 0.6–0.7 mm long. Capsules oboviod or spheroidal, septicidally and then loculicidally dehiscent 1.7–2.5 by 1.7–2.5 mm, beak 0.4–0.5 by 1.7–2 mm, hirsute. Seeds 20–30 per locule, 0.4–0.6 by 0.3–0.4 mm.

Thailand : NORTHERN: Mae Hong Son (Mae Sariang), Chiang Mai (Doi Angka, Doi Pha Mon – type: Garrett 494 -K L, Doi Suthep, Mae Taeng), Phitsanulok (Thung Salaeng Luang), Tak (Wang Chao); NORTH-EASTERN: Phetchabun (Khao Kao); Loei (Phu Ruea).

Distribution : Endemic.

Ecology : Open place, grassy ground, 1,570–1,650 m alt. Flowering: October–January.

Vernacular : Mu dao nuea (หมู่ดาวเหนือ).