Lepidaploa argyrotricha (Sch. Bip. ex Baker) Robinson (1990: 482)

Marques, Danilo, Farco, Gabriela Elizabeth, Nakajima, Jimi Naoki & Dematteis, Massimiliano, 2018, The genus Lepidaploa (Vernonieae, Asteraceae) in southern South America, Phytotaxa 362 (2), pp. 115-142 : 120-121

2. Lepidaploa argyrotricha (Sch. Bip. ex Baker) Robinson (1990: 482) . Vernonia argyrotricha Sch. Bip. ex Baker (1873: 96) .

Type:— BRAZIL. Without locality, F. Sello 1153 (syntype P! [online image!]). Figure 3 .

Erect subshrubs 0.9 m tall; branches velutinous. Leaves distichous, cauline, internodes 1.5–1.6 cm long, petioles 13.5– 14 mm long; blade 13.55–14.6 × 4.1–4.7 cm, membranaceous-coriaceous, rugose, elliptic to lanceolate, apex acute to caudate, margins entire, base cuneate, adaxial surface strigose, abaxial surface velutinous; venation eucamptodromous. Capitulescence seriate-cymose with capitula sessile, 12,7 cm long, axis densely velutinous, golden. Involucre narrowly campanulate, 6–8 mm in diam., phyllaries 5–6-seriate, brown or reddish, membranaceous, villous, outer oval-lanceolate, apex apiculate, intter elliptic-lanceolate, apex apiculate. Florets 18–19, corolla lilac, tube 3.2–4 mm long, glabrous, lobes 2–2.5 mm long, lanceolate, apex setose; apical anther appendages obovate, base sagittate; basal stylar node enlarged. Cypsela turbinate to obconic, 1.55–1.7 mm long, setose; carpopodium annular. Pappus white.

Selected specimens examined — BRASIL. Paraná: Bocaiúva do Sul, Estancia Sesmaria, roadside, 27 January 2005, E. Barbosa 1012 (CTES, MBM).

Distribution and habitat —The species is very rare in southern South America. It was found only in one locality in the state of Paraná in Brazil. It was collected in the Atlantic Rainforest ( Figure 2 ).

Phenology —Collected with flowers and fruits between December and March.

Notes —The species may be confused with L. chamissonis because of its whitish indumentum on the abaxial leaf surface. However, L. argyrotricha has blade leaves 13.5–14.6 × 4.1–4.7 cm (versus 2.7–9.8 × 1.8–3.9 cm), petiole 13.5–14 mm (versus 5–7 mm) long and corolla lobes without glandular trichomes (versus with glandular trichomes). In addition, L. argyrotricha has a very restricted distribution while L. chamissonis has a broader distribution in southern South America.

Figures

FIGURE 2. Geographical distribution of L. amambaia (circle) and L. argyrotricha (square) in Cone Sur.

FIGURE 3. Lepidaploa argyrotricha. A. Plant. B. Stem detail. C. Abaxial leaf surface detail. D. Abaxial leaf surface detail. E. Capitula. F. Cypsela and pappus. G. Floret. H. Floret dissected with anther detail. I. Style. J. Corolla lobe detail. K–M. Outer phyllaries. N–Q. Inner phyllaries.