Volume 13 > Part 2 > Year 2016 > Page 412 > Compositae (Asteraceae) > Tagetes

1. Tagetes erecta L.wfo-0000082627

Sp. Pl. 2: 887. 1753; C.B.Clarke, Compos. Ind. 143. 1876; Kerr, Fl. Siam. 2(3): 282. 1936; Backer & Bakh.f., Fl. Java 1: 416. 1965; Huang, Fl. Reipubl. Popularis Sin. 75: 389. 1979; Grierson, Revis. Handb. Fl. Ceylon 1: 234. 1980; Y.S.Chen & D.J.N.Hind, Fl. China 20–21: 854. 2011.

Accepted Name : This is currently accepted.

Description : Annual herb, to 1.5 m tall; stems erect, angular, glabrous, often sparingly branched. Leaves elliptic, 7–15 by 5–7 cm, pinnate, leaflets 4–9, lateral segments lanceolate, 1–5 by 0.3–0.8 cm, apex acute or acuminate, base attenuate, margins serrate; upper leaves generally finely setose pointed, glands few, both surfaces glabrous, lower surfaces with oil glands; petioles to 3.5 cm long, sometimes with some small lateral segments. Inflorescences usually single capitula; peduncles much thickened immediately below capitulum, 7–12 mm diam. Capitula 7–9 cm diam. at flowering; involucres subglobose, 1.5–2.5 by 12–18 mm, with 8–13 longitudinal ridges, apex acutely 5–10-dentate, glands all or nearly all narrowly elliptic; phyllaries ca 8, uniseriate, lanceolate, ca 21 by 6 mm, generally with 6–7 glands along margins of each phyllary, apex deltoid-acute, margins scarious; receptacle flattened, naked. Ray florets ca 8 per capitulum, pistillate; rays obovate, ca 1 by 1.3 cm, apex with 2 broad lobes, basal tubes ca 7 mm long. Disc florets many per capitulum, bisexual; corollas 13–15 mm long, apex 5-lobed, lobes 4 mm long, pubescent within. Achenes linear, 8–9 mm long, blackish, appressed setuliferous on angles; pappus of 5–8 scales, subulate, ca 2 aristate scales, 8–12 mm long, others 4–4.5 mm long.

Thailand : NORTHERN: Chiang Mai (common elsewhere but not represented in herbaria).

Distribution : Native of Mexico (type), now naturalised in tropical and subtropical regions of both the New and the Old World.

Ecology : Cultivated as a garden ornamental, sometimes escaped and naturalised along roadsides. Flowering: probably all year round.

Vernacular : Kham puchu luang (คำาปูจู้หลวง)(Northern); dao rueang yai (ดาวเรืองใหญ่)(Central); pho-thu (พอทู)(Karen-Mae Hong Son).

CommonName : African marigold.