Isoglossa prolixa (Nees) Lindau

Monocarpic herb or suffrutex, upright or sometimes scandent, 0.1-3 m tall; stems either bifariously hairy or with long (more than 3 cells), glandular and eglandular trichomes on all surfaces, glandular trichomes generally longer than eglandular trichomes. Leaves ovate, elliptic, (16-)20-59(-97) x (6-)10-28(-41) mm; dark upper and lighter lower surface with sparse, short, eglandular trichomes, acuminate, sometimes acute; base rounded, obtuse to cuneate; lateral veins 3 to 6, sometimes 7. Petiole (2-)2.1-22(-48) mm long with few, short, eglandular trichomes. Inflorescence terminal and axillary; flowers usually 1 at a node; terminal inflorescence (7-)14-43(-85) x (6-) 7.3-12(-15) mm; leaf below inflorescence ovate, (4-)5-14(-23) x (3-)3.3-7.6(-13) mm; leaf below terminal inflorescence (4-)5-14 (-23) x (3-)3.3-7.6(-13) mm; bracts with rare short and long eglandular trichomes and dense glandular trichomes with 5 or more stalk cells on the outer surface and rare short and dense long eglandular trichomes and sparse glandular trichomes with 5 or more stalk cells on the margins; bracts at base of inflorescence narrowly elliptic, ovate to lanceolate, often folding along their length, tip slightly recurved, (4.5-)5.5-8.7(-11) x (0.5-)0.8-3(-5) mm, acute to acuminate; bracts next to open flower narrowly elliptic to broadly lanceolate, often folding along half their length, (4-)4.7-7.3(-9.5) x (0.6-)0.7-2.4(-4.6) mm; apex slightly recurved; lateral inflorescence (7-)11-30(-47) x (4-)6.1-11(-14) mm; leaf below inflorescence ovate, (6-)6.6-10 (-12) x (2.3-)2.7-6.6(-11) mm; bracts at base of inflorescence narrowly elliptic, ovate or lanceolate, often folding along half their length, (4-)5.1-8.3(-10) x (0.5-)0.6-2(-3.5) mm, apex slightly recurved; bracts next to open flower lanceolate, (4-)5.3-9.6(-14) x (0.4-) 0.6-1.6(-2.5) mm; apex slightly recurved. Sepals linear, (4.5-)5.3-7.6(-9) x (0.4-)0.6-1.1(-1.5) mm at anthesis, (7-)7.9-9.8(-11) x (0.5-)0.7-1.2(-1.5) mm at fruiting, outer surface with rare short eglandular and sparse glandular trichomes with up to 4 or with 5 or more stalk cells, margins with rare short and dense fine eglandular trichomes and rare glandular trichomes with up to 4 or with 5 or more stalk cells. Corolla tube (3.2-)5.1-6.6(-7) x (2.2-)2.8-3.8(-4) mm; upper lip (4.5-)5.6-7.4(-8.5) x (4.5-)4.8-6.5(-7.5) mm; lower lip (4.5-)5.4-7.3(-8.5) x (4.5-)5.8-8.3(-8.5) mm; ridges on palate 5 to 8, usually 6 or 7. Pollen grains 36.9-37.3 µm diam. Capsule (7.1-) 8.1-11(-12.5) x (1.4-)2.2-3.6(-4) mm. Seeds (1.6-)1.8-2.9(-3.2) x (0.7-)0.8-2.3(-3.4) mm.