Fleischmannia hatschbachii H. Rob., 2015

Robinson, Harold, 2015, The genus Fleischmannia in Argentina, Bolivia, Brazil and Paraguay (Eupatorieae, Asteraceae), PhytoKeys 57, pp. 61-92 : 64-65

Fleischmannia hatschbachii H. Rob. sp. nov.

Type.

Brazil: Mata Grosso, Ribeirão Claro (mun. Alto Araguaía), 17°15'46"S, 53°11'54"W; erva flor alva, orla da matinha as margens de corrego, 1 July 1974, Hatschbach 34659 (holotype MBM, isotype US). (Figure 2 )

Description.

Erect herb 0.6-0.7 m tall, stems brownish, terete, striated when dry, hispid with small hairs. Leaves opposite, petioles 0.5-1.0 cm long, puberulous; blades ovate, 2.5-5.0 cm long, 1.0-1.8 cm wide, widest at basal 1/4or 1/3, base obtusely to acutely cuneate, margins bluntly subserrate with 4-6 teeth on each side, apex acute, or slightly blunt at tip, adaxial surface sparsely pilosulous; abaxial surface with prominent pale primary and secondary scabrid veins, areolae glabrous, without evident glandular dots, triplinervate from base with strongly ascending secondary veins. Inflorescence a lax panicle with mostly opposite branches spreading at mostly ca. 45° angles; mostly glabrous; main axis with foliiform bracts 0.6-2.0 cm long and 0.3-1.1 cm wide; branches filiform, peduncles 6-15 mm long, glabrous. Heads ca. 5 mm high, 3 mm wide; Involucral bracts ca. 25 in ca. 4 series, narrowly ovate to narrowly oblong, 1.0-3.5 mm long, 0.5-0.8 mm wide, with broadly scarious obtuse tips; florets ca. 17 in a head; corollas white, ca. 2.3 mm long, basal tube ca. 0.5 mm long, throat ca. 1.5 mm long, lobes ca. 0.5 mm long, with short monoseriate hairs on outer surface; anther thecae ca. 0.8 mm long; apical appendage ca. 0.3 mm long; style branches not broader at tips. Achenes submature, ca. 1.7 mm long. brownish, ribs slightly paler, setuliferous on ribs; pappus whitish, ca. 2 mm long, of ca. 25 slender scabridulous non-contiguous bristles.

Only the type collection is known.

Fleischmannia hatschbachii is one of two new species from Mato Grosso described here with slender glabrous or nearly glabrous branches of the inflorescence. This species and Fleischmannia matogrossensis , nevertheless, differ too much in their leaves to be the same species. A third species with glabrous branches of the inflorescence is found farther west in Bolivia, Fleischmannia neei . That differs by its less slender inflorescence branches, lavender corollas and its more glabrous leaf surfaces.

Figures

Figure 2. Fleischmannia hatschbachii H. Rob., isotype (US).