taxonID	type	description	language	source
EB89DA2C7E5756278602474C3626C7CB.taxon	diagnosis	Diagnosis. Similar to Pseudobombax longiflorum (Mart.) A. Robyns by its long petiolules, obovate to suborbicular leaflets, and maculate seeds, but differing by the smaller leaves, flowers and fruits, slender branches, petioles 4 times the length of the petiolules (vs. a petiole / petiolule ratio of 6 - 12 in Pseudobombax longiflorum), and fruits acuminate for the distal 20 % of their length (vs. 3 % - 5 % in Pseudobombax longiflorum).	en	Carvalho-Sobrinho, Jefferson G. de, Queiroz, Luciano P. de, Alverson, William S. (2013): Reinterpretation of the nomenclatural type of Pseudobombax heteromorphum (Malvaceae, Bombacoideae) reveals an overlooked new species from Bolivia. PhytoKeys 21: 53-61, DOI: http://dx.doi.org/10.3897/phytokeys.21.5213, URL: http://dx.doi.org/10.3897/phytokeys.21.5213
EB89DA2C7E5756278602474C3626C7CB.taxon	description	Description. Treelets 3 - 8 m, deciduous; branches glabrous, relatively slender, often covered with pale wax; brachyblasts absent. Stipules not seen. Leaves palmately compound, clustered at apex of the branches; petioles (17 -) 34 - 87 mm long, flattened, slender, glabrous, usually glaucous with pale wax at the ends, bases slightly thickened, apices slightly thickened to 3 - 4 mm diam.; petiolules 14 - 22 mm long; leaflets (4) 5 (7), chartaceous, proximal leaflets 17 - 38 x 9 - 30 mm, distal leaflets 45 - 57 (- 75) x 29 - 51 mm, obovate, broadly elliptic to suborbicular, apices retuse, rarely acuminate, bases obtuse, rounded, truncate to slightly cordate, margins entire, glabrous on both surfaces, except for sparse, peltate microtrichomes, abaxial surface dull-brown in dried state, midrib prominent abaxially, 8 - 12 secondary veins inconspicuous, intersecondary veins present, tertiary veins reticulate. Complete inflorescences not seen; pedicels 19 mm long (- 26 mm when in fruit). Flowers c. 65 mm long; receptacle with single whorl of c. 5 glands; calyces 8 - 9 x 11 - 15 mm, cupular to campanulate, truncate, outwardly glabrous except for peltate microtrichomes, internally sericeous; petals (50 -) 61 - 70 x 6 - 8 mm, linear to lanceolate, apex acute, dark-brown externally, covered with tufted, rigid hairs, inwardly pilose to glabrescent towards the base, covered mainly by verrucose microtrichomes; stamens c. 150 - 200, staminal tube 9 - 10 x 4 mm, pubescent, phalanges absent, filaments free for 40 - 58 mm, anthers hippocrepiform c. 2 mm long; ovary 5 x 2 mm, oblong-obovoid, glabrous except for peltate microtrichomes, style c. 70 mm long, glabrous, stigma inconspicuously 5 - lobed. Capsules c. 90 mm long, woody, oblong-obovoid, conspicuously acuminate for distal 15 mm or so, valves coriaceous, glabrous, kapok abundant, golden brown. Seeds c. 5 mm diam., subglobose to pyriform, maculate, glabrous.	en	Carvalho-Sobrinho, Jefferson G. de, Queiroz, Luciano P. de, Alverson, William S. (2013): Reinterpretation of the nomenclatural type of Pseudobombax heteromorphum (Malvaceae, Bombacoideae) reveals an overlooked new species from Bolivia. PhytoKeys 21: 53-61, DOI: http://dx.doi.org/10.3897/phytokeys.21.5213, URL: http://dx.doi.org/10.3897/phytokeys.21.5213
EB89DA2C7E5756278602474C3626C7CB.taxon	distribution	Distribution. Pseudobombax pulchellum is known from only four sites in the Department of Santa Cruz, Bolivia, and appears to be endemic to Chiquitano dry forest at elevations of 230 to 520 m.	en	Carvalho-Sobrinho, Jefferson G. de, Queiroz, Luciano P. de, Alverson, William S. (2013): Reinterpretation of the nomenclatural type of Pseudobombax heteromorphum (Malvaceae, Bombacoideae) reveals an overlooked new species from Bolivia. PhytoKeys 21: 53-61, DOI: http://dx.doi.org/10.3897/phytokeys.21.5213, URL: http://dx.doi.org/10.3897/phytokeys.21.5213
EB89DA2C7E5756278602474C3626C7CB.taxon	etymology	Etymology. The specific epithet refers to the small, delicate leaflets and long, slender petiolules of this species, diagnostic even in sterile specimens. The epithet also honors the Brazilian botanist Aline Costa da Mota for her important insights and collaboration on the systematics of Bombacoideae.	en	Carvalho-Sobrinho, Jefferson G. de, Queiroz, Luciano P. de, Alverson, William S. (2013): Reinterpretation of the nomenclatural type of Pseudobombax heteromorphum (Malvaceae, Bombacoideae) reveals an overlooked new species from Bolivia. PhytoKeys 21: 53-61, DOI: http://dx.doi.org/10.3897/phytokeys.21.5213, URL: http://dx.doi.org/10.3897/phytokeys.21.5213
EB89DA2C7E5756278602474C3626C7CB.taxon	discussion	Discussion. Pseudobombax pulchellum is a remarkable species by its diminutive aspect, especially the relatively small, retuse, obovate to suborbicular leaflets, and the flowers; the petiolules are markedly long in relation to the petiole, and fruits are conspicuously acuminate. It seems to be closely related to Pseudobombax longiflorum (Mart.) A. Robyns, a sympatric congener in Bolivian Chiquitano dry forest. The two are similar because of their glabrous aspect, long petiolules, leaflets with retuse apices, truncate to cordate bases, and maculate seeds. The new species is also similar to Pseudobombax croizatii A. Robyns and Pseudobombax minimum Carv. - Sobr. & L. P. Queiroz; both of these species share small flowers (60 - 65 mm long), glabrous staminal tubes, androecia with relatively few stamens (c. 150 - 200), and glabrous fruits. The following key can be used to separate these four species of Pseudobombax. 1 Petiolules 14 - 75 mm long. Petals externally blackish, staminal tube lacking phalanges (filaments freely originating from the apex of the tube). Seeds bicolored, maculate 2 - Petiolules to 5 mm long. Petals externally cream-colored, staminal tube originating phalanges 3 - 5 mm long. Seeds uniformly colored 3 2 Petioles 4 times the length of the petiolules. Flowers c. 65 mm long, calyx 8 - 9 mm long, staminal tube c. 10 mm long. Capsules c. 90 mm long, acuminate for the distal 20 % of their length Pseudobombax pulchellum (Bolivia) - Petioles 6 - 12 times the length of the petiolules. Flowers 15 - 22 mm long, calyx 15 - 25 mm long, staminal tube 35 - 60 mm long. Capsules 14 - 24 mm long, acuminate for the distal 3 % - 5 % of their length Pseudobombax longiflorum (Bolivia, Brazil, Paraguay, Peru) 3 Leaflets 7 - 9, obovate, cuneate, margins revolute. Flowers to 60 mm long, staminal tube glabrous. Capsules 55 mm long, not acuminate Pseudobombax minimum (Central Brazil) - Leaflets 5, elliptic to broad-elliptic, acute, margins plane. Flowers 85 - 100 mm long, staminal tube with bands of simple trichomes. Capsules c. 70 mm long, acuminate Pseudobombax croizatii (Colombia, Venezuela)	en	Carvalho-Sobrinho, Jefferson G. de, Queiroz, Luciano P. de, Alverson, William S. (2013): Reinterpretation of the nomenclatural type of Pseudobombax heteromorphum (Malvaceae, Bombacoideae) reveals an overlooked new species from Bolivia. PhytoKeys 21: 53-61, DOI: http://dx.doi.org/10.3897/phytokeys.21.5213, URL: http://dx.doi.org/10.3897/phytokeys.21.5213
