Caulis erectus, vel subascendens, gracilis, elongatus, a basi ramosissimus, subpilosus, superne subramosus, glaber, cr. 20-40 cm longus. Folia alterna, subsessilia vel petiolata, caulem basi dense investientia usque confertissima, anguste lanceolata, apice acuta, margine subincrassata, irregulariter sinuata, dentibus singulis exiguis ornata, subpilosa, subundulata, cr. 45-53 mm longa, 4-7 mm lata. Flores longe pedicellati, pedicellis 40-50 mm longis; ovarium 3-Ioculare, longe obovatum, cuneatum, paulto pilosum vel glabrum, fere 3 mm longum, 1.5 mm crassum; calycis laciniae anguste lanceolatae, basi haud dilatatae, apice acutae, margine valde incrassalae, integerrimae, paullo pilosae, haud involutae, cr. 5.5 mm longae, 0.5 mm latae; corolla subcampanulata, profunde laciniata, laciniis late ovalibus, apice subacuminatis, cr. 10 mm longa, laciniis cr. 7 mm longis, cr. duplo longioribus quam latioribus; filamenti basis rhomboideo-dilatata, ab utroque latere subobtusa, profunde sinuata, item lata ac alta; antherae elongatae, crassae, apice subacutae, cr. 6-plo lougiores quam latiores; stilus robustus, apice valde incrassatus, corollae fere 3/4 longitudine adaequans; stigmatis lobi 3, robusti, triangulariter dilatati, basi lati, apice subacuti, fere duplo Iongiores quam latiores, subinvoluti, glandulis 6 evolutis. Capsula 3-locularis, obovata usque ovalis, subcuneata, parte superiore late conica usque hemi-sphaerica.
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Erect, slender annual, 200-400 mm tall, stems modestly branched and ± hairy at base. Leaves alternate, subsessile, concentrated towards base, narrowly lanceolate, acute at apex, margin irregularly sinuate and minutely toothed. Flowers on long pedicels, ± campanulate, deeply cut with broadly oval lobes, white to pale mauve, with 6 small glands below stigma, ovary 3-locular, calyx glabrous. Capsule obovate, upper part broadly conical to hemispherical.