Pseudosenegalia Seigler & Ebinger, 2017

Seigler, David S., Ebinger, John E., Riggins, Chance W., Terra, Vanessa & Miller, Joseph T., 2017, Parasenegalia and Pseudosenegalia (Fabaceae): New Genera of the Mimosoideae, Novon 25, pp. 180-205 : 199-200

II. Pseudosenegalia Seigler & Ebinger , gen. nov.

TYPE: Acacia feddeana Harms, Repert. Spec. Nov. Regni Veg. 16: 450. 1920

[≡ Pseudosenegalia feddeana (Harms) Seigler & Ebinger ].

Shrubs or small trees, some to 12 m; twigs terete or nearly so, not flexuous; short shoots present; prickles and stipular spines absent. Leaves alternate or clustered on short shoots, bipinnate; stipules small, linear, symmetrical, herbaceous, tardily deciduous to persistent; petioles adaxially grooved, 0.5–13 mm long; petiolar gland usually present, sessile, solitary; rachis adaxially grooved, usually with glands between some pairs of pinnae; pinnae 1 to 7 pairs/leaf, opposite; paraphyllidia absent; leaflets 11 to 26 pairs/ pinna, linear, 1.2–2.9 X 0.4–0.9 mm, 1 vein from the base, glabrous to lightly pubescent, midrib subcentral. Inflorescences a cylindrical spike, 1 to 2 clustered in leaf axils. Flowers bracteate, sessile, actinomorphic, sympetalous, 5-merous, with a basal copular nectiferous disk; stamens 1 0 0 to 1 5 0, distinct, attached along the side of the nectariferous disk, exserted; anthers small, dorsifixed, dehiscing vertically, anther glands absent; ovary with a stipe to 2.1 mm long; style filiform; stigma filiform. Legumes straight to slightly curved, flattened to elliptic in cross section, oblong, eglandular, dehiscing along both sutures; seeds uniseriate, not surrounded by pulp, ovoid to ellipsoid, flattened; pleurogram present or absent.

Habitat and distribution. Pseudosenegalia is known to occur in dry scrub and thorn-scrub vegetation between 1300 and 3300 m in Bolivia.

TAXONOMIC KEY TO SPECIES OF PSEUDOSENEGALIA

1. Leaves with a single pair of pinnae............................. P. feddeana (Harms) Seigler & Ebinger

1 '. Leaves with 3 to 7 pairs of pinnae................. P.riograndensis (Atahuachi & L. Rico) Seigler & Ebinger