Eriosema Desvaux 1826
Creators: name: Cândido, Elisa S.
name: Fortuna-Perez, Ana Paula
name: Bezerra, Luísa M. P. A.
name: Aranha Filho, João Luiz M.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Fabales
Fabaceae
Eriosema

description: Key to the species of Eriosema in Minas Gerais, Brazil   
1 Leaves unifoliolate........................................................................................................................................................................... 2  
- Leaves usually trifoliolate, but sometimes the basal ones unifoliolate............................................................................................. 7  
 2 Stipules free, leaflets obovate............................................................................................................................ E. obovatum Benth.   
- Stipules fully or partially fused, leaflets linear, lanceolate, elliptical and ovate.............................................................................. 3  
 3 Leaflets linear, base acute, with the appearance of a rigid stick................................................................... E. stenophyllum Harms   
- Leaflets mostly ovate to lanceolate, base obtuse to cordate, never with the appearance of a rigid stick.......................................... 4  
 4 Stipules deciduous; leaflets conspicuously variable in size on the same plant........................... E. benthamianum Mart. ex Benth.   
- Stipules persistent; leaflets uniform in size on the same plant..........................................................................................................5  
 5 Subshrubs erect or ascending; stems usually glabrous or glabrescent; leaflets coriaceous; inflorescence densely white-sericeous (rarely pubescent)................................................................................................................................................. E. rigidum Benth.   
- Subshrubs prostrate, rarely erect; stems pubescent; leaflets membranaceous to slightly coriaceous; inflorescences glabrescent to pubescent........................................................................................................................................................................................... 6  
 6 Racemes with 8–15 flowers, usually longer than mature leaves................................................................. E. heterophyllum Benth.   
 - Racemes with 2–10 flowers, usually shorter than mature leaves...................................................... E. simplicifolium (DC.) G.Don   
7 Fully developed racemes longer than adjacent leaves.......................................................................................................................8  
- Fully developed racemes shorter than adjacent leaves.....................................................................................................................14  
 8 Stems glabrous or glabrescent; leaflets with three veins clearly marked................................................ E. glabrum Mart. ex Benth.   
- Stems pubescent; leaflets without clearly marked veins................................................................................................................... 9  
9 Stems procumbent...........................................................................................................................................................................10  
- Stems erects or ascending................................................................................................................................................................11  
 10 Leaflets membranaceous, base acute, stems copiously hirsute.......................................................................... E. prorepens Benth.   
 - Leaflets thin-coriaceous, base obtuse or subcordate (rare acute), stems sparsely pilose...................................... E. glaziovii Harms   
 11 Plants with caducous leaves (or nearly so) when fertile..................................................................................... E. defoliatum Benth.   
- Plants with persistent leaves when fertile.........................................................................................................................................12  
 12 Flowers 10–15 mm long..................................................................................................................................................... E. tozziae   
- Flowers 21–30 mm long...................................................................................................................................................................13  
 13 Leaflets obovate, silvery-pilose on the abaxial surface, contrasting with rufous-pubescent veins, base acute or obtuse...................................................................................................................................................................................................... E. riedelli Benth.   
 - Leaflets elliptic, rufous-pubescent on the abaxial surface, not contrasting with the veins, base mostly cordate......................................................................................................................................................................................................... E. longiflorum Benth.   
14 Leaflets usually less than five times longer than wide.....................................................................................................................15  
- Leaflets usually more than five times longer than wide...................................................................................................................20  
15 Stems glabrescent or cinereous to whitish pubescent.......................................................................................................................16  
- Stems yellowish, rufous- or ferrugineous-pubescent.......................................................................................................................18  
 16 Plants with leaves only near the branch apex at anthesis.................................................. E. hatschbachii Fort. -Perez & G.P.Lewis   
- Plants with scattered leaves throughout the branch length or leaves caducous at anthesis..............................................................17  
 17 Stipules caducous; leaves caducous at anthesis................................................................................................. E. congestum Benth.   
 - Stipules persistent; leaves persistent at anthesis............................................................................................. E. floribundum Benth.   
 18 Leaflets oblong-lanceolate with parallel secondary veins.............................................................................. E. pycnanthum Benth.   
- Leaflets ovate, obovate, elliptic to orbicular, without parallel secondary veins...............................................................................19  
 19. Plants erect, densely rufous-pilose or ferrugineous-pubescent.................................................................. E. rufum (Kunth) G.Don   
 - Plants prostrate, yellow-pubescent.................................................................................................................... E. campestre Benth.   
 20 Leaflets elliptic to narrowly elliptic, the standard with a retuse apex................................................. E. tacuaremboense Arechav.   
- Leaflets linear, lanceolate or rarely narrowly elliptic; the standard with an apiculate apex............................................................21  
 21 Stems whitish to cinereous-pubescent................................................................................................................... E. strictum Benth.   
 - Stems ferrugineous or rufous-pubescent..........................................................................................................................................22   
 22 Racemes with 4–5 flowers.................................................................................................................... E. crinitum (Kunth) G.Don   
 - Racemes with more than 8 flowers................................................................................................................ E. longifolium Benth.
description: Published as part of Cândido, Elisa S., Fortuna-Perez, Ana Paula, Bezerra, Luísa M. P. A. & Aranha Filho, João Luiz M., 2014, A New Species of Eriosema (Leguminosae, Papilionoideae, Phaseoleae) from Minas Gerais, Brazil, pp. 229-232 in Phytotaxa 178 (3) on page 231, DOI: 10.11646/phytotaxa.178.3.11, http://zenodo.org/record/5145516