Hyptis lappulacea Mart. ex Bentham (1833: 104)

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

3.9. Hyptis lappulacea Mart. ex Bentham (1833: 104) . Fig. 15

≡ Mesosphaerum lappulaceum (Mart. ex Benth.) Kuntze (1891: 526) . Type:— BRAZIL. “Habitat in udis ad marqines sylvarum caeduarum prope Guanarhingueta, Provinciae S. Pauli”, C. Martius s.n. (holotype M 0111907!).

= Hyptis lappacea Benth. var. hirsuta Bentham (1848: 109) . Type :— BRAZIL. Rio Grande, J. Tweedie (holotype K 0488397 !; isotype K 0488396 !).

= Hyptis reineckii Briquet (1911: 387) . Type :— BRAZIL. Porto Alegre , “in pascuis fruticetisque”, J. Czermak & E. M. Reineck 299 (holotype G 437999 !; isotypes HBG 518600 !, HBG 518601 !, F 017782 !).

Perennial herbs, up to 1.5 m high, stems pilose with hispid appressed hairs. Leaves with petiole, 0.5–4 cm long, elliptic or ovate blade 3–15 × 2–5 cm, acute apex, acute attenuate base, hairs lax and long, sometimes multiseriate, randomly distributed over both surfaces, irregularly serrate margin. Capitula 1–1.5 cm diam., many-flowered, solitary, axillary to superior leaves, peduncle 1–3 cm long. Bracteoles 8–12 mm long, ovate, acuminate, strigose. Calyx 4–5 mm up to 7 mm in fruit, exterior pilose with some sessile glands, interior glabrous; teeth 2–3 mm long, sub-equal, triangular, aristate. Corolla white or pink, 5–10 mm long. Nutlets ovoid, 1–1.5 mm long, dark brown, smooth.

Remarks: — Hyptis marrubiastra Pohl ex Bentham (1833: 102) has been considered by Epling (1937: 310) as a synonym of Hyptis lappulacea . However the Pohl type, collected at Goias state, approaches more the brazilian species Hyptis sinuata Pohl. ex Bentham (1833: 103) , and furthermore this last species is frequent in Goias state, from where the type is from, and H. lappulaceae does not occur there (R.M. Harley, pers. comm.).

Distribution and habitat:— Hyptis lappulacea is present in southern Brazil, eastern Paraguay and northeastern Argentina in the provinces of Misiones and northern Corrientes, constituting a new record for this last country.

Selected specimens examined:— ARGENTINA. Corrientes. Santo Tomé, 27 km de Virasoro, camino Garruchos, 12 February 1972, Krapovickas 21646 (CTES!). Misiones: Cainguás, Predio UNLP, 14 March 2000, Biganzoli 788 (SI!). San Ignacio, Teyú Cuaré, 15 March 1951, Montes 15155 (SI!).

Figures

FIGURE 15. Hyptis lappulacea Mart. ex Benth. (from Montes 15155, SI). A. Plant branch with inflorescence. B. Leaf adaxial surface. C. Detail of leaf abaxial surface pubescence. D. Detail of leaf adaxial surface pubescence. E. Detail of bracteole. F. Calyx.