Selago longicalyx Hilliard

Perennial herb with a small woody caudex, stems one or a few from apex of caudex, c. 300-900 mm long, erect, simple or sparingly branched above, branches sharply ascending, stems puberulous, hairs up to 0.1-0.2 mm long, patent or slightly recurved, closely leafy. Leaves alternate, strongly fascicled, primary ones mostly 10-27 x 1-2 mm, smaller upwards (axillary leaves also smaller), linear or linear-lanceolate, acute, base scarcely narrowed, margins entire, glandular-punctate, few tiny hairs (c. 0.1 mm) mainly on margins and midline on lower surface. Inflorescence: flowers in small tight glomerules further arranged in a terminal corymb up to c. 70 mm in diam., remaining compact in fruit. Brad adnate to whole or part of pedicel, free from calyx, lowermost c. 3-5 x 1-1.8 mm (excluding petiolar part), lanceolate, lower half deeply concave, thick keel, broad membranous margins, few minute hairs on lower back and margins. Pedicel (lowermost) c. 1-4 mm long. Calyx 3.8-6 mm long, tubular, subequally 5-lobed, lobes much shorter than tube, deltoid, acute, minutely puberulous all over outside (hairs less than 0.1 mm), often reddish, accrescent to enclose the cocci. Corolla tube 5.5-7 mm long, narrowly funnel-shaped, limb c. 4.5-7.5 mm across lateral lobes, lobes subequal, 2-3 x 1.2-2 mm, broadly elliptic white. Stamens: posticous filaments 1.5-2 mm long, anthers in throat; anticous filaments 1.8-2.5 mm long, anthers shortly exerted. Stigma and style c. 6-7.5 mm long, style minutely puberulous. Ovary c. 0.8 x 0.3 mm. Cocci 2.5-3 x 0.8 mm, ± oblong, light brown, smooth.