Hyptis dumetorum Morong

O’Leary, Nataly, 2015, Synopsis of subtribe Hyptidinae (Lamiaceae) in Argentina, Phytotaxa 233 (3), pp. 201-235 : 220

3.6. Hyptis dumetorum Morong in Morong & Britton (1893: 200). Fig. 12

Type :— PARAGUAY. Sine loc., 1 May 1889, T. Morong 633 (holotype NY 639 !; isotypes E 265492 !, G 307369 !, K 488314 !) .

= Hyptis dyscheres Briquet (1896: 794) ≡ Mesosphaerum dyscheres Briq. , nom. illeg. Type:— PARAGUAY. Concepción, Sept. 1892, O. Kuntze s.n. (holotype NY 641!)

= Hyptis gymnodonta Briquet (1896: 795) ≡ Mesosphaerum gymnodontum Briq. , nom. illeg. Type:— BOLIVIA. Velasco, Jul. 1892, O. Kuntze s.n. (holotype NY 647!)

= Hyptis dumetorum var. inconcinna Briquet (1907: 619) . Type (lectotype designated here):— PARAGUAY. “ Cordillera de Altos”, Jan., E. Hassler 3747 ( G 307364 !; isolectotypes G 307365 !, G 307366 !, GH 1244 !, K 488313 !, P 720999 !, UC 944373 !).

Perennial herbs, up to 1 m high, stems densely hispid, mostly towards the apex. Leaves with a brief petiole 0.5–1.5 cm long, ovate blade, 2–4 × 2.5–3 cm, acute or obtuse apex, obtuse or cordate base, both surfaces hispid, irregularly serrate-dentate margin. Capitula 0.8–1.2 cm diam., many-flowered, solitary, axillary to superior leaves, peduncle 0.4–0.6 cm long. Bracteoles 6–7 mm long, linear and filiform, glabrous. Calyx 3 mm up to 6–7 mm in fruit, mid-tube deflexed in fruit, exterior sub-glabrous or pilose, interior glabrous; teeth 1.2–1.5 mm long, sub-equal, aristate. Corolla pale blue or pink color, 6 mm long. Nutlets narrow obovoid, 1.2 mm long, brown, smooth.

Remarks: — At G there are three duplicates (sheets) of Hassler 3747, the type material of Hyptis dumetorum var. inconcinna , one of them is here designated lectotype, following Arts. 8 and 9 of ICN ( McNeill et al. 2012; McNeill 2014).

Distribution and habitat: — Hyptis dumetorum grows in Bolivia (possibly introduced), S. Brazil, Paraguay and northern Argentina. It is found in sandy soils and dry areas.

Selected specimens examined:— ARGENTINA. Formosa: Clorinda, 5 January 1927, Venturi 9119 ( US!).

Figures

FIGURE 12. Hyptis dumetorum Morong (from Pedersen 5920, SI and Múlgura 3562, SI, both specimens from Paraguay). A. Detail of plant basal part and roots.A’. Plant branch with inflorescence.B. Detail of leaf adaxial surface pubescence.C. Detail of leaf abaxial surface pubescence. D. Detail of bracteole. E. Calyx.