Herba perennis, e basi lignoso ramosa, caulibus ereetis vel ascendentibus perpaucis aut confertis ad 28 cm. altis plerumque simplicibus angulatis mox teretibus hirtellis ochraceis saepe valde foliatis. Folia patentia vel subimbricata, trifoliolata; petioli usque ad 5 mm. longi; foliola subfalcato-lanceolata, elliptica aut obovato-oblonga, rotundata vel acutata, ad 18 mm. longa, 3-6 mm. lata, terminalia lateralibus paulo longiora, supra fere glabra, subtus parce hirtella, laete viridescentia, longe ciliata, subcoriacea; stipula unica, arrecta, foliolis similis iis saepissime breviora, rarius aequilonga, extus hirtella. Flores terminales, corymbosim congesti, (rarius raraulos laterales brevissimos terminantes), citrinei, roseo-suffusi; corymbae hemisphaericae, pluriflorae, (raro pauciflorae), ad 35 cm. diametro, laterales terminalibus minores floribus paucioribus; pedicelli ad 10 mm. longi, pilosuli, bracteola lineari duplo aut tertio breviore medio instructi. Calyx 7-8 mm. longus, extra hirtellus, dentibus superioribus anguste deltoideis, lacinia inferiore subulata dentibus duplo longiore. Corolla glaberrima; vexillum unguiculatum, 10-12 mm. longum, limbo late ovato acutato aut obtuso vel breviter cuspidato, basi rotundato vel subhastato unguem linearem scariosum sulcatum aequante; alae falcatae, oblongae, apicem versus angustatae, rotundatae, basi longe sagittatae, 6-10 mm. longae, limbo ungui gracili breviore aut superante; carina alis similis, late navicularis, medio vix 3 mm. lata, obtusiuscula, basi auriculata, unguibus gracilibus 3-4 mm. longis. Ovarium frontem versus liirsutulum, stylo prorso curvato brevius, stigmate simplice.
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Distinguished from L. corymbosa and L. eriantha by standard petal being ± glabrous or with a line of hairs along middle of lamina. Flowering time (July) Oct.-Feb.
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