Camchaya tenuiflora Kerr

Annual herbs, 20–70 cm tall. Stems erect, terete, inconspicuously ribbed, scabrous with uniseriate and T-shaped hairs. Leaves alternate, ovate or lanceolate, 3–10 by 1.5–2.5 cm, margin serrate, apex acute, base attenuate, chartaceous; both surfaces scabrous with whip-shaped hairs, cylindrical hairs and capitate glands; lateral veins 5–10-paired; petioles up to 10 mm long. Capitulescences terminal and axillary, paniculate and solitary. Capitula campanulate, 8–10 mm long, pedunculate. Receptacle convex, 1.5–3 mm in diam., glabrous. Involucres campanulate, in 6–7 series, 8–9 mm long, 6–10 mm in diam. Phyllaries imbricate, light green with purple apex, margin with spines up to 5 mm long, outer surface arachnoid glandular; the outer and the middle ones lanceolate, apex spinose; the inner ones lanceolate to oblong apex acuminate. Florets 40–60; corollas funnelform, purple or white, puberulous, glands capitate; corolla tubes 4–6 mm long; corolla lobes 1.5–2.5 mm long. Anthers ca. 2 mm long, apical appendage acute, base rounded. Styles purple, 4–7 mm long, branches 1.5–1.7 mm long. Achenes obovate, 1.5–1.7 mm long, glabrous, 10-ribbed. Pappus in 1 series of bristles, 1–4 mm long, present in some florets, deciduous.

Thailand: Chiang Mai, Chiang Rai, Loei, Chaiyaphum, Nakhon Ratchasima. Endemic.

Camchaya tenuiflora là một loài thực vật có hoa trong họ Cúc. Loài này được Kerr mô tả khoa học đầu tiên năm 1935.