A synopsis of the genus Stryphnodendron (Fabaceae, Caesalpinioideae, mimosoid clade) Author Scalon, Viviane Renata 0000-0001-7000-6641 Universidade Federal de Ouro Preto, Herbário OUPR. Campus Morro do Cruzeiro s. n., 35400 - 000, Ouro Preto / MG, Brazil. vrscalon @ gmail. com; https: // orcid. org / 0000 - 0001 - 7000 - 6641 vrscalon@gmail.com Author Paula-Souza, Juliana De Universidade Federal de Santa Catarina, Departamento de Botânica / CCB. Rua Eng. Agronômico Andrei Cristian Ferreira 216, 88040 - 535, Florianópolis / SC, Brazil. Author Lima, Alexandre Gibau De Universidade de São Paulo, ESALQ. Av. Pádua Dias 11, 13418 - 900, Piracicaba / SP, Brazil. & Escola Nacional de Botânica Tropical, Jardim Botânico do Rio de Janeiro, Rua Pacheco Leão 2040, 22460 - 030, Rio de Janeiro / RJ, Brazil. alegibau @ gmail. com. Author Souza, Vinicius Castro Universidade de São Paulo, ESALQ. Av. Pádua Dias 11, 13418 - 900, Piracicaba / SP, Brazil. text Phytotaxa 2022 2022-05-03 544 3 227 279 http://dx.doi.org/10.11646/phytotaxa.544.3.1 journal article 55680 10.11646/phytotaxa.544.3.1 f125f93d-3a5b-48a3-9561-4ebee258e3d6 1179-3163 6520280

TABLE 4. Morphological diagnostic features between the Amazonian multifoliolate taxa, with medium-sized leaflets and glabrous corolla (rarely subglabrous).

Features	S. guianense	S. microstachyum	S. foreroi	S. platycarpum	S. orinocense
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				(fig. 7)	(fig. 6)
Geographical distribution (Amazonian phytogeographical provinces according to Prance 1973, 1977)	North Amazonia (Atlantic Coastal, Roraima and Jari-Trombetas)	Western Amazonia (Solimões/Western Amazonia and Southwestern Sector) and Eastern Amazonia (Atlantic Coastal and Jarí-Trombetas)	Western Amazonia (Solimões/Western Amazonia and Southwestern Sector) and Eastern Amazonia South (Xingu-Madeira)	Iquitos area, Peru	Southern Venezuela, Orinoco River area
Habit	Shrubs to small-medium sized trees, 2–10 m tall	Medium-large sized trees, 8–20 m tall	Medium-sized trees, 6–12(–15) m tall	Small-sized trees, height unknown	Medium-sized trees, 8–10 m tall
Petiolar extrafloral nectary (size, shape and position)	2–3 × 1.5–2 mm; verruciform with an elongated base; basal	3–5 × 1.5–2 mm, conical; basal	Ca. 4 × 2 mm; conical; basal	1.5 × 0.5 mm, verruciform; basal	4 × 1 mm, verruciform with an elongated base; basal
Pairs of pinnae	8–11	5–9(–11)	6–8	9–10	(5–)7–8(–10)
Extrafloral nectary of the rachis (number, size and shape)	(0–)1–4; 0.5 × 0.5 to 1 x 1 mm, verruciform	1–2; 1–3 × 1–2 mm, conical to conical with an elongated base	1; 2–3 × 1 mm; conical	2–4; ca. 1 × 1 mm, conical	(1–)2; 1–1.5 × 1 mm, conical
Pairs of leaflets	(6–)8–14(–18)	(4–)6–11(–14)	5–12(–14)	(5–)8–11	8–11
Extrafloral nectary of the rachillae (number, size and shape)	(1–)2–4(–5); 0.3 × 0.3 to 0.5 x 0.5 mm, verruciform	1–3; 1–2 × 1–1.5 mm, conical	1–2 × 1–1.5 mm, conical	2–9; 0.5 × 0.5 mm, verruciform	1–2; 1 × 1 mm, verruciform
2nd degree petiolule indumentum	Yellow-pubescent	Yellow-pubescent	Densely yellow-pubescent	Yellow-pubescent	Yellowpubescent
Size of leaflets	(4–)6–15(–23) × 4–8(–13) mm	(5–)8–20(–22) × (3–)5–14(–16) mm	(6–)11–15 × (3–)5–7(9) mm	(4–)6–11 × (3–)5–7 mm	(8–)10–15 × (6–)8–11 mm
Indumentum of leaflets	Glabrous, subglabrous to sparsely puberule at the upper surface, lower surface subglabrous to puberule	Glabrous, subglabrous to sparsely puberule at the upper surface, lower surface puberule	Subglabrous to puberule at the upper surface, lower surface pubescent	Glabrous at the upper surface, lower surface puberule	Subglabrous to glabrous at the upper surface, lower surface puberule
				(fig. 7)	(fig. 6)
Tuft of hairs on the	Usually present,	Usually absent	Present	Present	Present
lower surface of blade	sometimes
	inconspicuous
Spike length and	8–16(–18.5) cm;	(4.6–)6.5–10	4–6.5 cm; sparsely	7.2–7.7 cm;	9–14 cm;
indumentum of	ferruginous-	cm, ferruginous-	ferruginous-	yellow-	sparsely
inflorescence rachis	pulverulent, sparsely	pulverulent and	pubescent and	pulverulent and	ferruginous-
	to rarely densely	yellow-pubescent	densely yellow-	sparsely yellow-	pulverulent
	yellow-pubescent		pubescent	pubescent	and yellow-
					pubescent
Flower color	Pinkish	Purple to reddish	Pinkish	Pinkish	White
Calyx (length, presence	Ca. 0.5 mm;	0.5–0.8 mm, glabrous	Ca. 0.5 mm;	Ca. 0.5 mm;	Ca. 0.5 mm;
of evident lobes,	glabrous to rarely	to subglabrous, rarely	glabrous to	glabrous, ciliate	glabrous to
indumentum)	subglabrous, usually	sparsely pubescent	subglabrous, deeply	only at the apex	subglabrous;
	ciliate; lobes not		apiculate	of the lobes,	shortly
	evident			shortly apiculate	apiculate
Corolla (shape, size and	Campanulate, ca. 2	Campanulate, 2–	Campanulate, ca.	Campanulate,	Tubular-
indumentum)	mm, 1/2 connate,	2.5mm, 1/2 connate,	2mm, 1/2 connate,	ca. 2mm,	campanulate,
	glabrous	glabrous to rarely	glabrous to rarely	1/2 connate,	ca. 3–3.5mm,
		subglabrous	subglabrous	glabrous	2/3 connate,
					glabrous
Stamens (length)	3–3.5 mm	3–4 mm	3–3.5 mm	Ca. 3.5 mm	5–6 mm
Indumentum of ovary	Glabrous to	Glabro, white-	Glabro to white-	Glabrous	Glabrous
	white-pulverulent,	pulverulent to white-	pulverulent
	glabrescent	pubescent
Prophylls	Deciduous,	Deciduous, yellow-	Deciduous, yellow-	Deciduous,	Late deciduous,
	pubescent	pubescent	pubescent	pubescent	yellow-
					pubescent
Fruit	Sessile, straight to	Sessile, usually	Sessile, slightly	Sessile, straight	not seen
	very slightly curved,	straight, rarely	curved, subturgid,	to rarely weakly
	flat-compressed,	slightly curved,	seeds weakly	curved, flat-
	seeds slightly	flat-compressed to	prominent, 7–8(–9)	compressed
	prominent, edge	subturgid, seeds	× 0.9–1.3 cm	with slightly
	slightly thick, 5.5–7	weakly prominent,		prominent seeds
	× 1.1–1.4 cm	4.2–8.5 × 1.2–1.5 cm		when immature,
				mature not
				seen, 11–13.5 ×
				2.2–2.7 cm