Convolvulus hasslerianus (Chodat) O'Donell , Lilloa 23: 430. 1950. ( O'Donell 1950: 430).

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 : 95

55. Convolvulus hasslerianus (Chodat) O'Donell, Lilloa 23: 430. 1950. ( O'Donell 1950: 430).

Breweria hassleriana Chodat, Bull. Herb. Boiss, ser, 2, 5: 683. 1905. ( Chodat and Hassler 1905: 683). Type. PARAGUAY, Carimbatay, Hassler 4541 (holotype G; isotype NY!).

Type.

Based on Breweria hassleriana Chodat

Description.

Usually erect but occasionally decumbent to ascending cerrado perennial with woody xylopodium, vegetative parts villous with long spreading cobwebby hairs; stems several, erect, herbaceous, 20-30(-50) cm high. Leaves sessile or very shortly petiolate, 1.5-4.5 × 0.8-1.5 cm, ovate to oblong-ovate; base rounded, truncate to subcordate or sagittate; apex acute or (above) apiculate; margin entire; petiole 0(-2) mm. Flowers solitary (rarely paired); peduncles 20-50 mm; bracteoles 3-5 × 0.5-1 mm, linear-lanceolate, finely acuminate; pedicels 5-10 mm; outer sepals 10-15 × 5-7 mm, ovate, acuminate; corolla 3.2-4 cm long, white, unlobed, midpetaline bands pink, long-pilose, terminating in a mucro; ovary glabrous; style glabrous, divided 8-12 mm above base, persistent in fruit; stigmas 3 mm. Capsule glabrous, unusually large, c. 1 cm diameter; seeds smooth. [ O’Donell 1950: 430-431, f. 3]

Distribution.

Paraguay (Krapovickas et al. 45901, Hassler 9123, Balansa 1056); Brazil: Parana (Hatschbach 3675, 20011, 30722), Rio Grande do Sul (Gaudichaud 659). 0-800 m.

Notes.

Unique species because of its adaptation to the cerrado biome. The erect habit, xylopodium, woolly, often cobwebby indumentum, subsessile leaves and large corolla all render it distinct from other American species.