Tagetes pauciloba Candolle (1836: 644)

Schiavinato, Dario J. & Bartoli, Adriana, 2018, About the identity of Tagetes pauciloba (Asteraceae, Tageteae), Phytotaxa 362 (2), pp. 200-210 : 205

Tagetes pauciloba Candolle (1836: 644) .

Type:—‘CHILE’ but likely ARGENTINA. ‘ Chile’, T. Haenke s.n. (holotype G 00456857 [photo!]; isotype P 02140934 ex Herb. Sch. Bip.

in Herb. E. Cosson [photo!]). Epitype (designated here):— ARGENTINA. Mendoza: Las Heras department, Villavicencio, 2176 m, 32º 31,885´S 69º 01,328´W, 15

February 2016, D. Schiavinato, D. Sbarra & F. Ratto 23/2016 ( BAA 00004830!). = Tagetes mendocina Philippi (1865: 337) , syn. nov. Type:— ARGENTINA. Mendoza, Cordillera de los Andes cerca de Villavicencio, 19 April 1863, M. Landbeck s.n. (holotype SGO

000006357!).

Description

Perennial subshrubs or shrubs with xylopodium and gemmiferous roots, 0.25–0.90 m tall, aromatic. Stems several, erect, ramified, glabrous, foliaceous. Leaves herbaceous, opposite below, most of the superior ones subopposite, shortly petiolate or subsessil, glabrous, leaf blade ovate to obovate, (1–)2–4(–7) × (0.5–)1–3(–4) cm, pinnately dissected into 1–6 pairs of linear-ovate lobes, (3–)6–20(–30) × 0.5–3.5 mm, entire or dentate, with pellucid, circular-ovate glands, 0.3–0.5 × 0.15–0.25 mm. Capitula radiate, heterogamous, 1–3, in lax terminal corymbiform inflorescences, pedunculated or rarely subsessile. Receptacles flat or slightly convex, naked. Involucres cylindrical, (10–)11–14(–19) × 4–5(–6) mm. Phyllaries 5, in one series, connate except the apex, oblong, glabrous, streaked with numerous linear glands, 1–2 × 0.15–0.3 mm, most of the upper one elliptic, 0.5–0.6 × 0.2–0.4 mm, apex of phyllaries triangular, 0.9– 1.5 mm, acute or obtuse, hispidulous at margins. Ray florets 5, pistillate, corolla yellow, tube 5–6 mm long, pubescent, ligule oblong, (3–)5–9 × (2.5–) 3–5 mm, entire or 2–3-lobate, glabrous; style branches linear, 1.7–2 mm long, apex obtuse, papillose. Disc florets 9–25, perfect, corollas yellow, tubular, 5-dentate, tube 6.5–17 mm, pubescent, lobes 0.75–1.50 mm long, glabrous. Anthers 5, rounded at the base, 2–2.5 mm × 0.3–0.5 mm, apical appendages triangulate, 0.6–0.75 × 0.3–0.4 mm, filament collar cylindrical, 0.4–0.7 × 0.15–0.25 mm; style branches linear, 1.25–2 mm long, bearing a short, obtuse papillate appendage, ca. 0.3 mm long. Achenes 6–10 × 0.5–1 mm, cylindrical to subfusiform, 5-ribbed, pubescent in the entire surface, black at maturity. Pappus of 5 inequeal scales in 1 series, some aristiform, 3–6 mm long, barbellate, and the rest scamiform, 1–2 mm long, with apex setose or fimbriate; sometimes 1–5 additional scales, very reduced, 0.1–0.8 mm long ( Fig. 4 : A–B).

Figures

FIGURE 4. Tagetes pauciloba in the wild (Mendoza, Argentina). A, B. Capitula. C. Habitat.