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Plantae annuae vel ?perennes. Laminae saepe foliorum hippocrepiformes vel late sagittiformes (1-)3-9.5(-11) x (0.8-)2-8 cm, late ellipticae ad ± rotundae vel late deltoideae sed cum sino basali plerumque lato convexoque; lobae basales obtusae, marginibus interioribus vulgo concavis. Inflorescentia fasciculus pedicellorum densus, ad basin sinus folii ortus. Flores heterostyli, 4(5)-partiti. Corolla (6-)11-17(-19) mm diametro, vel alba vel pallide erubescens vel pallide malvinus-erubescens, fauce flavo; lobae cum duabus alis latis lateralibus profunde laciniatis, ab apice paene usque ad basin, atque cum carina verticali lata laciniata, longitudinali in superficie interiore; carina plerumque ab apice ad 1/3-2/3 lobae longitudinem, nonnumquam valde deminuta; loba et cum fimbria conspicua proxime super basin papillarum tenuium. Capsula ellipsoidea ad late-ellipsoidea, 2.5-5 x 1.7-3 mm. Semina (5-)10-44(-61) per capsulam, paene globosa sed compressa (typice superficiebus laevibus convexis cum protuberatione centrali, marginibus dense tuberculis brevibus obtusis velatis; tubercula nonnumquam desunt, nonnumquam autem et in superficiebus lateralibus et in marginibus tubercula adsunt), 0.67-1.02 x 0.6-0.95 x 0.35-0.57 mm (longitudo latitudinem +/- aequans, crassite duplolongior), straminea ad atrofusca vel nigra maturitate; caruncula basalis, plerumque tenuis inconspicuaque.
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Annual or ?perennial plants. Laminae of leaves often horseshoe-shaped or broadly arrow-shaped, (1-) 3-9.5 (-11) x (0.8-) 2-8 cm, broadly elliptic to ± round or broadly deltoid but with a basal sinus mostly broad and convex. Basal lobes obtuse, with interior margins commonly concave. Inflorescence a dense fascicle of pedicels, arising at the base of the leaf sinus. Flowers heterostylous, four-(five-)parted. Corolla (6-) 11-17 (-19) mm in diameter, either white or pale red or pale malvine-red, the throat yellow. Lobes with two broad, lateral, deeply laciniate wings, from the apex almost to the base, and with a broad, laciniate, vertical keel, longitudinal on the inner surface. Keel mostly from the apex to 1/3 to 2/3 the length of the lobe, sometimes strongly diminished. Lobe also with a conspicuous fringe nearly above the base, of thin papillae. Capsule ellipsoid to broadly-ellipsoid, 2.5-5 x 1.7-3 mm. Seeds (5-) 10-44 (-61) per capsule, almost globose but compressed (typically with smooth surfaces, convex with a central protruberance, the margins densely covered with short, obtuse tubercles. Tubercles sometimes absent, sometimes, however, tubercles are present on the lateral faces and on the margins), 0.67-1.02 x 0.6-0.95 x 0.35-0.57 mm (length ± equaling the width, twice longer than the thickness), straw-colored to dark-cloudy or black at maturity. Caruncle basal, mostly thin and inconspicuous.
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