Diascia caitliniae K.E.Steiner

Glabrous annual herb, rosulate, simple or branching from base. Stems erect or decumbent, up to 460 mm long, angular, up to 6-sided with 2 or more ribs, sides up to 2 mm wide. Leaves alternate, opposite or whorled, simple, petiolate, lamina elliptic or lanceolate to ovate, (4.0-)6.0-46 x 1.9-14 mm, obtuse to acute, base attenuate, margins toothed or pinnatifid to pinnatipartite, lobes or divisions up to 6.5 mm long, oblong to deltoid, entire, obtuse to acute; petioles up to 15 mm long; cauline leaves progressively smaller and more divided acropetally. Flowers axillary, 1-3 open per stem, pedicels 44-77 mm long, ascending, dorsiventrally flattened throughout, 1.6-2.3 mm wide, recurving and forming a sinuate or s-shaped bend in fruit with apical portion becoming erect again at maturity. Calyx lobes 5, spreading, ovate, acuminate to aristate, margins white ciliolate, upper lobe 2.9-6.0 x 1.6-2.4 mm, lateral lobes 2.9-5.0 x 1.5-2.2 mm, lower lobes 2.7-5.5 x 1.62.5 mm. Corolla bilabiate, 5-lobed, limb 12-27 mm long; grayish violet with white reverse; upper lobes 3.8-8.3 x 4.3-7.3 mm, oblong, obtuse to emarginate, base strongly oblique, lateral lobes 4.5-8.5 x 4.3-6.8 mm, oblong, obtuse to emarginate, base truncate, lower lobe 4.5-9.2 x 4.3-6.8 mm, obovate and emarginate to obcordate, covered with dark purple peltate glandular trichomes inside and out; tube shallowly cupped, purple with four yellow patches, obscurely bi-saccate, sacs up to 2 mm in depth or sometimes not distinct from surrounding tube, yellow, containing a patch of multicellular oil-secreting trichomes; central portion of tube inverted to form stamen-bearing boss 3.4-4.9 mm high, deep magenta. Stamens 4, erect and curving forward, anticous filaments falciform, 3.0-5.6 mm long, glabrous; posticous filaments geniculate, ±4.4 mm long, lower half thickened and bending backwards and then curving forward distally, with dark purple clavate trichomes at bend, both filaments pale lilac with darker bases; anthers 0.5-0.8 mm, strongly cohering, dark gray, pollen bright orange. Ovary oblong-ovoid, laterally compressed contrary to the septum, 1.9-2.6 x 1.0-1.3 mm, style 4.2-6.2 mm long, more than twice as long as ovary, deflected and curving forward apically; stigma surrounded by anthers. Capsule widely ovoid, ±7-9 x 6-7 mm, exceeding sepals at maturity. Seeds reniform, 1.1-1.2 mm long, dorsal surface ridged, ventral surface with oblong cup-like opening, long sides with reniform perforation, embryo curved.