Cantinoa althaeifolia (Pohl ex Benth.) Harley & Pastore (2012: 9)

O’Leary, Nataly, 2015, Synopsis of subtribe Hyptidinae (Lamiaceae) in Argentina, Phytotaxa 233 (3), pp. 201-235 : 203-205

1.1. Cantinoa althaeifolia (Pohl ex Benth.) Harley & Pastore (2012: 9) . Fig. 1

≡ Hyptis althaeifolia (‘ althaeaefolia ’) Pohl ex Bentham (1833: 115) ≡ Mesosphaerum althaeifolium (‘ altheaefolium ’) (Pohl ex Benth.) Kuntze (1891: 526). Type (lectotype designated by Epling 1936: 255):— BRAZIL. Minas Gerais, Fazenda Vieira, J. B. E. Pohl 2540 (W 51763!; isolectotypes F 61001F!, K 488278!, W 51764!).

= Hyptis vestita Bentham (1833: 114) ≡ Mesosphaerum vestitum (Benth.) Kuntze (1891: 527) ≡ Hyptis vestita Benth. var. tomentosa Schmidt (1858: 128) . Type (lectotype originally designated in B by Epling 1936: 255, destroyed; replaced lectotype designated by Harley & Pastore 2012: 9):— BRAZIL. “In Brasilia meridionali”, F. Sellow s.n. (K 0488279!; isolectotypes A, E 265484!, F, HAL 098172!, LE, UC).

Aromatic sub-shrub, 1–1.8 m high, densely woolly pubescence, with dendroid hairs on stems and leaves. Leaves with petiole, 1–2.5 cm long, blade ovate, 3.5–8 × 3–7 cm, acute or obtuse apex, cordate, truncate or round base, irregularly serrate margin, both surfaces densely woolly pubescent with dendroid hairs. Flowers grouped in 20 flowered cymes, surround by an involucre of numerous bracteoles, 2.5–5 mm long, exterior woolly, interior glabrous. Cymes arranged in branched panicles, 5–15 cm long. Calyx 2–5.5 mm long, teeth ca. 0.5 mm or partly or entirely obsolete, densely woolly with dispersed sessile glands. Corolla white or pale blue or blue color, 4–5 mm long. Stigma 7 mm long. Nutlets ellipsoid 2–2.5 × 0.6 mm, apiculate, smooth, chestnut color.

Remarks:— Cantinoa althaeifolia is characterized by the presence of dendroid hairs and the leaf morphology. The density of inflorescences and density of pubescence is variable in C. althaeifolia .

Distribution and habitat:— This species grows in Paraguay, northeastern Argentina and southern Brazil.

Selected specimens examined: — ARGENTINA. Corrientes: Ituzaingó, ruta prov. 34, 15 km al SE de ruta 12, 15 February 2005, Belgrano 300 (SI!). Misiones: Candelaria. Loreto, 8 March 1945, Montes 605 (SI!).

Figures

FIGURE 1. Cantinoa althaeifolia (Pohl ex Bentham) Harley & Pastore (from Belgrano 300, SI). A. Plant branch. B. Stem pubescence. C. Detail of stem pubescence. D. Leaf, adaxial surface.