Flora of New Zealand Series

galinsoga

Erect annual, 10-50 cm tall. Stems sparsely to densely hairy, becoming almost glabrous to remaining densely hairy below, much-branched. Lvs sparsely to moderately hairy especially on margins and veins, petiolate, ovate to elliptic, acute to acuminate, obtuse to truncate at base, serrate, 1-6-(8) cm long; upper cauline lvs usually smaller, narrower and apetiolate. Capitula 3-7 mm diam., in loose clusters; peduncles 3-20 mm long, moderately to densely hairy and with glandular hairs. Involucral bracts foliaceous, deciduous or the outer persistent, sometimes with narrow membranous or somewhat laciniate margins. Outer receptacular scales entire or 3-fid; innermost scales usually entire, sometimes irregularly 2-3-fid or laciniate, deciduous or persistent. Ray florets usually 5; ligules white or tinged red, moderately to deeply 3-fid, 1-2.2 × 1-2.2 mm. Disc florets many, yellow to orange. Achenes of ray florets strongly flattened, glabrous or sparsely hairy, c. 1.5 mm long; pappus of c. 10 laciniate scales c. 1 mm long. Achenes of disc florets flattened or square in section, hairy especially on angles, 1.2-1.6 mm long; pappus scales 15-20, 1-1.5 mm long, lanceolate, laciniate and aristate.

N.: vicinity of Auckland City, Wanganui, Gisborne City; K.

C. Mexico 1946

Wasteplaces, gardens, parks.

This sp. is only locally established. Many of the characters listed by Canne (op. cit.) for distinguishing G. quadriradiata from G. parviflora are not satisfactory for N.Z. material. G. quadriradiata is generally more hairy and usually has larger, more deeply lobed ligules, but the shape of the pappus scales (Fig. 23) is the most reliable character. It has been previously recorded in N.Z. as G. bicolorata, G. ciliata, and G. hispida.