Suffrutex up to 0.7 m tall, branching basally; branches annual, erect, sericeous; rootstock perennial, woody. Leaves exstipulate 5-35 mm long, becoming smaller towards the apex; leaflets narrowly elliptical to obovate, sericeous, bases cuneate, apices rounded, apiculate. Inflorescence usually a terminal raceme; bracts lanceolate, 4-7 mm long, sericeous. Flowers 10-80, evenly spaced. Calyx turbinate, 4-6.5 mm long, densely sericeous externally, tube 3-4 mm; lobes narrowly deltoid 1.5-3 mm long, lateral lobes slightly divergent. Corolla gentian-blue fading to white basally; vexillum lamina suborbicular 4-6 x 5-7 mm, sericeous outside, unguiculate; alae oblong, 3.5-5 x 2-2.5 mm, glabrous, with 17-25 rows of lamellate sculpturing, apex rounded, base unguiculate; carina deeply cymbidiform, 3-4 x 2-2.5 mm, glabrous, with lateral pockets, apex blunt, base unguiculate. Ovary 2.5-3 mm. long, densely sericeous; ovules many; style filiform, 4-6 mm long, arcuate; stigma terminal, truncate. Fruit ovoid, 5-6 mm long, slightly compressed, sericeous, apex minutely aquiline, 1-2-seeded.
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L. amajubica is closely related to L. glabrescens but can be distinguished from the latter by details of the bracts and calyx lobes as given in the key. It is also similar to L. viminea but differs in the sparse and appressed vestiture, the narrower calyx lobes and the blue colour of the flowers (white with purple venation in L. viminea).
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