Hyptis lorentziana Hoffmann (1880: 137)

O’Leary, Nataly, 2015, Synopsis of subtribe Hyptidinae (Lamiaceae) in Argentina, Phytotaxa 233 (3), pp. 201-235 : 225-226

3.10. Hyptis lorentziana Hoffmann (1880: 137) . Fig. 16

≡ Mesosphaerum lorentzianum (O.Hoffm.) Kuntze (1891: 526) . Type (lectotype designated here):— ARGENTINA. Concepción del Uruguay, March 1879, P.G. Lorentz s.n. ( HBG 518602 !; isolectotypes F 61013 !, GOET 4235 !, K 488461 !, M 111910 !).

= Hyptis paraguayensis Briquet (1897: 30) . Type (lectotype designated by Epling 1937: 319):— PARAGUAY. Forêt de Yaguarou, dans une mare desséchée, February 1877, B. Balansa 1002 (G 307288!; isolectotypes K 488379!, P 721132!, P 721133!).

= Hyptis barbarensis Briquet (1897: 30) . Type:— PARAGUAY. “In pascuis propre Santa Barbara”, March 1876, B. Balansa 1160 (holotype P 721134!)

= Hyptis czermakii Briquet (1911: 388) . Type :— BRAZIL. Porto Alegre, February 1899, J. Czermak & E. M. Reineck 236 (holotype G 437942 !; isotypes E 00265501 !, GOET 004234 !, JE 00004307 !, M 0111911 !, M 0111912 !, P 00721130 !, P 00721131 !, S04-2752 !).

Perennial herbs, up to 1 m high, stems sub-glabrous or pilose with appressed hairs. Leaves with petiole, 0.3–3.5 cm long, wide ovate blade, 1–7.5 × 0.5–3 cm, acute apex, truncate or obtuse base, sub-glabrous sometimes with randomly distributed scare strigose hairs, with abundant sessile glands on abaxial surface, serrate margin. Capitula 1–1.5 cm diam., many-flowered, solitary, axillary to superior leaves, peduncle 0.5–4 cm long. Bracteoles 8–10 mm long, ovate, acuminate, strigose. Calyx 2.5–3.5 mm up to 5 mm in fruit, exterior pilose with some strigose and glandular hairs, interior with a dense band of thick and short hairs; teeth 1 mm long, triangular, aristate. Corolla white or pink color, 3.5–6.5 mm long. Nutlets ovoid, 1 mm long, dark brown, smooth.

Remarks: — Hyptis lorentziana is characterized by its sub-glabrous leaves with many sessile glands immersed in the abaxial surface, and its conspicuous bracteoles. The type material of O. Hoffmann’s species, Hyptis lorentziana , was housed at Berlin ( Stafleu & Cowan 1979), and later destroyed. A lectotype is here selected among the isotypes. Briquet mentions in the protologue of Hyptis paraguayensis two collections: Balansa 1002 and Balansa 5121. Epling (1937: 319) chose Balansa 1002 as “ lectotype ”, but he indicated he has been unable to find the original material so he had chosen a material housed at Herb. K. Therefore here the Balansa 1002 specimen found at Herb. G is established as the correct lectotype given this material must have been certainly seen by Briquet, who worked at Geneva.

Distribution and habitat:— Hyptis lorentziana is distributed through Bolivia, southern Brazil, Paraguay, northeastern Argentina and northern Uruguay.

Selected specimens examined:— ARGENTINA. Buenos Aires: Pdo. La Plata. Islã Martín García, isal solís, 26 March 2007, Hurrell 6406 (SI!). Corrientes: s. loc., playa, 15 March 1947, Nicora 4620 (SI!). Entre Rios: Concepción Del Uruguay, La Selmira, 30 March 1967, Pedersen 8191 (SI!). Formosa: Guayculec, August 1919, Jorgensen 3415 (SI!). Misiones: Misiones. Guaraní, Moconá, 28 February 2000, Deginani 1535 (SI!).

Figures

FIGURE 16. Hyptis lorentziana Hoffmann. A. Plant. B. Flower. C. Calyx expanded, inner view. D. Corolla expanded, inner view. E, Calyx. Image from Crespo (1979), modified, reprinted with permission.