Chamaecrista (ser. Setosae) H. S. Irwin & Barneby 1982
Creators: name: Oliveira, Jaqueline Aparecida De
name: Mendes, Thainara Policarpo
name: Souza, Alessandro Oliveira De
name: Silva, Marcos José Da
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Fabales
Fabaceae
Chamaecrista

description: Key to species of Chamaecrista series Setosae   
1. Leaves with 1 pair of leaflets..............................................................................................................................................................2  
- Leaves with 2 or 3 pairs of leaflets.....................................................................................................................................................3  
 2. Subshrub 0.12–1 m tall; Leaves with petiole 1–4 cm long; leaflets oblanceolate or oboval-spatulate, surface adaxial scabroussetulose, base asymmetrically cuneate or attenuate; pedicel 1.7–3.6 cm long; flowers with 4 petals oboval and 1 asymmetrically oboval.............................................................................................................................................................................8.  Ch. scabra    
 - Shrub 1.5–2.5 m tall; leaves sessile; leaflets rhombic, elliptical or asymmetric-oval, adaxial surface setulose, base conspicuously asymmetric; pedicel 1–1.4 cm long; flowers with 5 petals similar oboval............................................................1. Ch. auriszerdae   
 3. Leaflets heteromorphic, one pair reniform and other suborbicular; petiole up to 3 mm long...................................... 5. Ch. obtecta   
- Leaflets isomorphic; petiole 1–9 cm long..........................................................................................................................................4  
4. Leaflets carthaceous or papyraceous..................................................................................................................................................5  
- Leaflets coriaceous.............................................................................................................................................................................6  
 5. Leaflets elliptical with flat margin; tertiary veins non-prominent on the abaxial surface; anthers conspicuously mucronate; seeds oblongoid; plants from the states of Goiás, Distrito Federal, Mato Grosso, Mato Grosso do Sul, and Minas Gerais.............................................................................................................................................................................................................4. Ch. multiseta   
 - Leaflets oblong, oblong-lanceolate or oval with margin revolute; tertiary veins prominent on the abaxial surface; anthers slightly mucronate; seeds pyriform; plants from Venezuela and Amazon region of Brazil............................................... 7. Ch. orenocensis   
6. Subshrubs or shrubs, 1–5 m tall; leaves with 2 or 3 pairs of leaflets; flowers in panicle..................................................................7  
- Shrubs 0.3–0.8 m tall; leaves always with 2 pairs of leaflets; flowers in typical racemes.................................................................8  
 7. Leaflets with secondary veins perpendicular in relation to the main and anastomosed in a submarginal vein; inflorescence puberulent, never setose or setulose...........................................................................................................................3. Ch. coradinii   
 - Leaflets with secondary veins ascending in relation to the main and anastomosed before the margin; inflorescence setose- or setulose-viscous...............................................................................................................................................................9. Ch. setosa   
 8. Plant decumbent and non-cespitose; leaflets and axes of inflorescence setose-stellate; flowers 3.4–4 cm long; legume setose..........................................................................................................................................................................................2. Ch. campicola   
 - Plants erect and caespitose; leaflets glabrous; axes of inflorescence setose or setulose; flowers 1–2 cm long; legume puberulent................................................................................................................................................................................ 6. Ch. ochrosperma
description: Published as part of Oliveira, Jaqueline Aparecida De, Mendes, Thainara Policarpo, Souza, Alessandro Oliveira De & Silva, Marcos José Da, 2021, New taxonomic circumscription to Chamaecrista ser. Setosae (H. S. Irwin & Barneby) H. S. Irwin & Barneby (Leguminosae, Caesalpinioideae), pp. 118-158 in Phytotaxa 490 (2) on page 128, DOI: 10.11646/phytotaxa.490.2.1, http://zenodo.org/record/5753717