Convolvulus hermanniae subsp. erosus (Desr.) J.R.I.Wood & R.W.Scotland, 2015

Wood, John R. I., Williams, Bethany R. M., Mitchell, Thomas C., Carine, Mark A., Harris, David J. & Scotland, Robert W., 2015, A foundation monograph of Convolvulus L. (Convolvulaceae), PhytoKeys 51, pp. 1-282 : 90-91

49 b. Convolvulus hermanniae subsp. erosus (Desr.) J.R.I.Wood & R.W.Scotland stat. nov. Figure 9, t. 8-15

Convolvulus erosus Desr., Encycl. [Lamarck et al.] 3: 558. 1792. ( Desrousseaux 1792: 558). Type. URUGUAY, Montevideo, Commerson s.n. (holotype P-Juss!).

Convolvulus crenatus Vahl, Symb. Bot. 3: 31. 1794, nom. illeg., non Convolvulus crenatus Jacq. (1789). ( Vahl 1794: 31). Type. BRAZIL, Thouin s.n. (?C. not seen).

Convolvulus vahlii Roem. & Schult., Syst. Veg, ed. 15 bis [Roemer & Schultes] 4: 280. 1819. ( Roemer and Schultes 1819: 280). Type. Based on Convolvulus crenatus Vahl

Convolvulus costatus Meyen, Reise Erde 1: 264. 1834. ( Meyen 1834: 264). Type. CHILE, Santiago, Meyen s.n. (B†).

Aniseia costata (Meyen) Walp., Nov. Act.Acad, Caes, Leop. Carol.Nat. Cur.367 (1843). ( Walpers 1843: 367). Type based on Convolvulus costatus Meyen

Convolvulus hermanniae var. elongatus Choisy, Prodr. [A.P. de Candolle] 9: 409. 1845. ( Choisy 1845: 409). Type. URUGUAY, Montevideo, Commerson s.n. (holotype P [Herb. Juss.]).

Convolvulus hermanniae var. viridis Meisn., Fl. Bras. (Martius) 7: 312. 1869. ( Meisner 1869: 312). Type. URUGUAY, Montevideo, Sellow s.n. (not found).

Convolvulus mollis var. albidovillosus Chodat & Hassl., Bull. Herb. Boissier ser. 2, 5: 699. 1905. ( Chodat and Hassler 1905: 699). Type. PARAGUAY, Valenzuela, Hassler 7103 (holotype G).

Convolvulus hermanniae var. albidovillosus (Chodat & Hassl.) Hassl., Repert. Spec. Nov. Regni Veg. 9: 195. 1911. ( Hassler 1911: 195). Type. Based on Convolvulus mollis var. albidovillosus Chodat & Hassl.

Type.

Based on Convolvulus erosus Desr.

Distinguishing features.

Ovary and capsule apically pilose. [ O’Donell 1957: 167 p. p.; O’Donell 1959: 271 p.p.].

Distribution.

The only subspecies present in the Southern Cone extending north to Bolivia and Brazil: Chile (Cuming 280, Buchtien s.n. [19/11/1895]); Bolivia (Wood 19217, Bang 990); Argentina (Seijo 1354, Venturi 5464); Uruguay (Gibert s.n.); Brazil (Glaziou 19668). 0-2800 m.

Notes.

Convolvulus hermanniae is distinguished from Convolvulus crenatifolius by its few-flowered peduncles and dense white-tomentellous indumentum. From Convolvulus bonariensis it differs in its white-tomentellous leaves. Subsp. erosus is unique amongst American taxa because of its hirsute ovary and capsule. O’Donell 1957: 167-169 Figure 8; O’Donell 1959: 277.