Parasenegalia Seigler &amp; Ebinger &amp; Riggins &amp; Terra &amp; Miller 2017, gen. nov.
Creators: name: Seigler, David S.
name: Ebinger, John E.
name: Riggins, Chance W.
name: Terra, Vanessa
name: Miller, Joseph T.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Fabales
Fabaceae
Parasenegalia

description: <b>I. Parasenegalia Seigler &amp; Ebinger</b>, gen. nov. TYPE: <i>Acacia skleroxyla</i> Tussac, Fl. Antill. 1: 146– 14 8, pl. 2 1. 18 0 8 [1 80 8–1 81 3] [<b>≡</b> <i>Parasenegalia skleroxyla</i> (Tussac) Seigler &amp; Ebinger]. Trees, shrubs, or lianas, some to 25 m; twigs not flexuous, terete or nearly so; short shoots absent; prickles and stipular spines absent. Leaves alternate, bipinnate; stipules small, linear, symmetrical, herbaceous, tardily deciduous to persistent, rarely absent; petioles adaxially grooved, 10–50 mm long; petiolar glands present, sessile, solitary; rachis adaxially grooved, usually with a gland between some pairs of pinnae; pinnae 3 to 20 pairs/leaf, opposite; paraphyllidia present or absent; leaflets 7 to 65 pairs/ pinna, linear to oblong, 1 to 5 veins from the base, glabrous to puberulent, midvein subcentral to submarginal. Inflorescence a globose head or cylindrical spike, solitary to small clusters in leaf axis or in large pseudoracemes or pseudopanicles of globose heads. Flowers bracteate, sessile, actinomorphic, sympetalous, 5-merous, with a basal copular nectariferous disk; stamens 40 to 140, distinct, attached along the side of the nectariferous disk, exserted; anthers small, dorsifixed, dehiscing vertically, with a small stalked gland usually present; ovary mostly sessile to subsessile (rarely with a stipe to 1.6 mm long); style filiform; stigma filiform. Legumes straight to slightly curved, flattened, oblong, eglandular, dehiscing along both sutures (sometimes tardily so). Seeds uniseriate, not surrounded by pulp, ovoid to ellipsoid, flattened, sometimes with a marginal wing; pleurogram sometimes present, sometimes covering most of the seed. <i>Habitat and distribution</i>. Occurring in tropical areas of the New World, <i>Parasenegalia</i> is comprised of three species restricted to the Caribbean, one in Belize and Guatemala, and three scattered in South America. TAXONOMIC KEY TO SPECIES OF <i> <i>PARASENEGALIA</i> </i> 1. Inflorescence a cylindrical spike. 2. Leaflets 30 to 65 pairs/pinna; distance between leaflet pairs 0.7–1.6 mm (Dominican Republic &amp; Haiti).................................................................. <i>P. skleroxyla (Tussac) Seigler &amp; Ebinger</i> 2 <i>'</i>. Leaflets 7 to 31 pairs/pinna; distance between leaflet pairs 1.4–9.5 mm. 3. Leaflets 1.8–3.2 mm wide; distance between leaflet pairs 1.4–4 mm; leaflet margins not revolute (Central America)...................................................... <i>P. lundellii</i> Seigler &amp; Ebinger 3 <i>'</i>. Leaflets 4–11.3 mm wide; distance between leaflets pairs 3.8–9.5 mm; leaflet margins slightly revolute (Caribbean)...................................................... <i>P. muricata</i> (L.) Seigler &amp; Ebinger 1 <i>'</i>. Inflorescence a globose to subglobose head. 4. Petiolar gland columnar, the apex 0.3–0.5 mm across; inflorescence receptacle elongated (Brazil)..................................................................... <i>P. santosii</i> (G. P. Lewis) Seigler &amp; Ebinger 4 <i>'</i>. Petiolar gland sessile, not columnar, the apex mostly more than 0.6 mm across; inflorescence receptacle not elongated, usually subglobose to globose. 5. Leaflets 3–7 <b>X</b> 0.8–2.1 mm; distance between leaflet pairs 0.8–2.1 mm; leaflet midveins bluish purple beneath (South America)............................... <i>P. visco</i> (Lorentz ex Griseb.) Seigler &amp; Ebinger 5 <i>'</i>. Leaflets 7–20 <b>X</b> 2.2–8.5 mm; distance between leaflet pairs 2.5–7 mm; leaflet midveins not bluish purple. 6. Inflorescence 6.5–10 mm across; 6 to 9 pinna pairs/leaf (Bolivia, Peru)..................... ................................................. <i>P. rurrenabaqueana</i> (Rusby) Seigler &amp; Ebinger. 6 <i>'</i>. Inflorescence 9–14 mm across; 3 to 6 (7) pinna pairs/leaf (Caribbean).............................................................................. <i>P. vogeliana</i> (Steud.) Seigler &amp; Ebinger
description: Published as part of <i>Seigler, David S., Ebinger, John E., Riggins, Chance W., Terra, Vanessa &amp; Miller, Joseph T., 2017, Parasenegalia and Pseudosenegalia (Fabaceae): New Genera of the Mimosoideae, pp. 180-205 in Novon 25</i> on pages 181-183, DOI: 10.3417/2015050, http://zenodo.org/record/2561467