The genus Fleischmannia in Argentina, Bolivia, Brazil and Paraguay (Eupatorieae, Asteraceae)

The genus Fleischmannia in Argentina, Bolivia, Brazil and Paraguay (Eupatorieae, Asteraceae)

H. Rob. sp. Nov.

Description.

Erect to scrambling perennial herbs to 1.2 m tall, stems terete, scarcely striate when dry, weakly puberulous to glabrate or glabrous; Branches spreading at ca. 45 to nearly 90 ° angles; Leaves opposite; Petioles slender, 0.3-1.7 cm long, finely puberulous; Leaf blades ovate, 2.3-6.5 cm long, 1-3 cm wide, broadly rounded base, scarcely acuminate at petiole, margins of lower leaves with sharply acute, apex short to narrowly acute, adaxial surface mostly glabrous, slightly shiny, abaxial Surface slightly paler, puberulous on larger veins, mostly glabrous between; Triplinervate from base of blade, larger veins whitish. Inflorescence to lax pyramidal panicle with mostly elongate, opposite, spreading branches, bearing small clusters of heads at tips; Below and in inflorescence with small foliiform bracts on main axis; Axis and branches of inflorescence glabrous or nearly so; Peduncles 3-7 mm long, glabrous. Heads narrowly to broadly campanulate, 6 mm high, ca. 4 mm wide; Involucral bracts ca. 25 in ca. 5 series, gradate, 1-4 mm long, 0.3-1.0 mm wide, with narrowly scarious margins and apex, most basal bracts narrowly ovate, inner bracts oblong with obtuse apices, outer surfaces glabrous; Florets ca. 17 in a head, corollas pale violet or pink, 2.0-2.3 mm long, basal tube ca. 0.4 mm long, throat 1.5-1.7 mm long, lobes ca. 0.3 mm long with few uniseriate hairs outside; Anther thecae ca. 0.5 mm long, apical appendage ca. 0.15 mm long; Style branches not broader distally. Achenes ca. 1.8 mm long, ribs sparsely setiferous above scabrid below, not or scarcely paler; Pappus white, bristles ca., 30, ca. 2 mm long, not broader at base, not contiguous, fragile,

Fleischmannia neei is most distinct among Bolivian members of the genus by the glabrous branches of the inflorescence. The Buchtien collection was annotated by Rusby. B.L. Robinson, probably because of the locality. Many of the other specimens were also given that name. Typical Fleischmannia polopolensis differs obviously in its large denser corymbiform inflorescence and its densely puberulous peduncles. Relationship of the new species might seem much closer to the newly described Fleischmannia steinbachii , with which it cooccurs in Santa Cross, but the latter again has densely puberulous peduncles, more pubescent leaf surfaces, and labs larger acute teeth on the margins of the lower leaves. An additional distinction of the new species seems to be the shorter corollas and much shorter anther thecae.

The new species also resembles the newly described Fleischmannia Hatschbachii of Mato Grosso, Brazil, but that has thinner branches in the inflorescence, more pilosulous leaves and white corollas.

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