Pithecellobium glazioui Bentham, Trans. Linn. Soc. London 30: 597. 1875 & in Martius, Fl. Bras. 15(2): 454. 1876 "glaziovii". — ". . . in monte Corcovado provinciae Rio de Janeiro: Glaziou n. 1565." — Holotypus, K (annotated by Sandwith as type specimen, but lacking collector’s serial number and locality-data) = NY Neg. 2033!; isotypi, C(herb. warming.) = F Neg. 21904!, P (dated 17 sept. 1867)!, US 453717!. — Feuilleea glazioui (Bentham) O. Kuntze, Revis. Gen. Pl. 1: 188. 1891. Chloroleucon glazioui (Bentham) Lewis, Leg. Bahia 166. 1987.

P. vinhatico Record in Record & Mell, Timbers Trop. Amer. 211. 1924. — "Yale Nos. 1806 and 4698 collected by [H.M.] Curran with botanical material, Bahia, Brazil" — Authentic material, labeled "vinhatica de espino, Rio Gongogy, 100-500 m, State of Bahia": Curran 28, NY (fragm. + photo)!, US!, and 59, GH!, NY (fragm. + photo)!, US 704860!. — Chloroleucon vinhatico (Record) Killip ex Record, Trop. Woods 63: 6. 1940.

Trees flowering when (2.5-)3-30 m tall, with smooth trunk attaining 2-5.5 dm diam, potentially armed at random nodes with stout thorns to 1.5 cm (but often shorter, or on most branchlets lacking), the young stems, lf-axes, lft-margin, and often one or both faces of lfts pilosulous with spreading-incurved pallid hairs to 0.1-0.25 mm, the foliage bicolored, the brown-olivaceous plane lfts paler beneath, the hemispherical capitula or short ovoid racemes of fragrant white fls borne usually 2-4 together (rarely solitary) at the first 2-4, either foliate or efoliate nodes of new branchlets; perulate buds 0.5-3 mm, the scales either puberulent or glabrous dorsally. Stipules usually 0, when present either filiform 1-nerved or elliptic several-nerved, to 2.5-4 mm, caducous long before maturity of associated lf. Lf-formula (ii—)iii—v(—vi)/l 3— 26; lf-stks 2.5-8 cm, the petiole (8-) 10-33 mm, the longer interpinnal segments 7-18 mm; a sessile cupular nectary either near, or above, or below midpetiole (0.5-)0.6-1.2 mm diam, in profile 0.15-0.4 mm tall, similar but smaller nectaries at apex of lf-stk and of pinna-rachises; pinnae accrescent distally, the rachis of longer ones 3-9 mm, the longer interfoliolar segments 2-4(-4.5) mm; lfts oblong or linear-oblong from obtusangulate base, obtuse or deltate subacute, the larger ones 7-15 x (1.7-)2-4.5 mm, 2.7-4.7(-5) times as long as wide; venation of 3-5, commonly 4 primary nerves from pulvinule, the midrib displaced to divide blade a little less than 1:2, either straight or gently porrect distally, on one or both sides 3-4- branched, the anterior primary nerve faint, narrowly intramarginal, the inner posterior one produced well beyond midblade, the outer ones short and weak, all these and random connecting venules sharply prominulous, less so beneath but distinctly so above. Peduncles 7-30(-40) mm; capitula 25-50-fld, the fls either all sessile or the lower ones elevated on slender pedicel to 1.1 mm, this becoming shorter distally, all fls either almost homomorphic or the terminal one or two differing in slightly longer androecial tube, but not sharply distinguished from the rest; receptacle ob- ovoid or narrowly clavate 2.5-12 mm; bracts linear-subulate to 1 mm, caducous before anthesis; perianth 5-merous, the calyx hispidulous overall or only toward the minutely ciliolate orifice, the corolla either glabrous except for papillate margin of lobes or thinly puberulent distally; calyx (1—)1.2—2.3(—2.5) x 0.50.8 mm, the deltate or subulate teeth 0.1-0.25 mm; corolla (4.5-)5-8 mm, the tube striate when dry, expanded into the ascending limb; androecium 16-20- merous 15.5-17.5 mm, the tube 6.5-9 mm, exserted either in all or only in some distal fls; ovary glabrous, conical at apex. Pods usually solitary, sessile at cuneate base, in profile broad-linear and at once falcately recurved and randomly twisted, 10-14 x 1.1-1.4 cm, the stout sutures 1.2-2 mm wide, the convexly arched seminiferous one deeply undulate-constricted between seeds, the opposed one evenly recurved, the stiffly leathery, finally subligneous, venulose, glabrous valves low-convex over each seed, when weathered liberated from the stringlike sutures but not breaking up into free-falling segments, the mesocarp becoming somewhat mealy; dehiscence tardy, inert, the narrowly gaping sutures not readily releasing the seeds; funicle filiform, sinuous; seeds (few seen completely ripe) transverse, plumply obovoid-ellipsoid, in broad profile ±6 x 4.5 mm, the hard testa ±0.13 mm, the obscure hippocrepiform pleurogram ±3 x 2.5 mm.

In caatinga thickets and disturbed coastal forest, in Bahia often in cocais, below 500 m, interruptedly widespread from S Ceará and Río Grande do Norte S through Bahia and E Minas Gerais to Guanabara. — Map 38. — Fl. erratically through most of the year, in the NE following rains. — Arapiraca (shared with Ch. foliolosum), jurema branca (shared with Ch. acacioides), pau rósea, vinhatico de espino.

Chloroleucon dumosum, as here defined, is quite variable in width of leaflets, in length of floral receptacle, and in size of flowers, but we have not discovered any convincing discontinuity in any of these features or any clear correlations between them. There may, however, be some clinal variation along a north-south axis from smaller denser to longer looser inflorescence, while the broadest leaflets are yet known from Bahia only. We have not been able to confirm the great difference in flower-size between Ch. dumosum and Ch. glazioui that was described by Lewis (1987: 165, in clave) and can discern no other criteria. Pithecellobium vinhatico corresponds with the broad-leaflet type just mentioned.

In the common range, Ch. dumosum differs from Ch. foliolosum and Ch. acacioides in much wider leaflets, but more nearly resembles the first in the form of the fruit. It lacks the abrupt heteromorphism of the flowers, which is a constant character of Ch. foliolosum and acacioides. Leaf-formula decisively distinguishes the pubescent form of Ch. tenuiflorum, which in Minas Gerais replaces Ch. dumosum to the west of Sa do Espinhaço, as does the spirally coiled fruit.