Selago tenuifolia (Rolfe) Hilliard

Bushy perennial herb, stems eventually many tufted from a woody somewhat stoloniferous stock, c. 150-500 mm long, sprawling to erect, virgately well branched, branches rodlike, each terminating in an inflorescence, pubescent, hairs c. 0.1-0.15 mm long, strongly recurved, very leafy right up to inflorescence. Leaves opposite soon alternate upwards, fascicled, spreading, largest primary leaves 8-32 x 0.3-1 mm, linear, apex acute, base scarcely narrowed or not, margins endre, thickened, texture thick, midrib sometimes raised on lower surface, channelled on upper, glandular-punctate, often very minute hairs scattered along margins and midline on lower surface; axillary leaves similar but usually smaller. Inflorescence a terminal compound corymbose panicle composed of innumerable spikes c. 4-7 x 4-7 mm in first flower, elongating to c. 10-50 mm in fruit, flowers then often distant. Bract adnate to calyx tube, lowermost 1.7-3.2(-4.5) x 0.8-1.2(-1.4) mm, lanceolate, acute to subacute, concave, hairs c. 0.1 mm long on lower margins. Pedicels up to 0.1 mm long, usually wanting. Calyx 1.3-2(-2.2) mm long, deeply 3-lobed, anticolateral lobes 1-1.3(-1.6) x 0.3-0.5(-0.8) mm, about twice as long as broad, ± oblong, subacute, occasionally deeply or shallowly bilobed, each lobe with a vascular strand, hairs c. 0.1 mm long on margins and keels, globular glands as well. Corolla tube 1.5-2(-3.8) mm long, funnel-shaped, limb 2.3-3.2(-4) mm across lateral lobes, posticous lobes 0.8-1.2 x 0.3-0.8 mm, anticous lobe 1.2-1.8 x 0.6-1 mm, all lobes oblong-elliptic, white. Stamens: posticous filaments 1.1-1.7 mm long, anticous filaments 1.5-2 mm long, all anthers exserted. Stigma and style 1.5-5 mm long, style glabrous or with a few very minute hairs. Ovary c. 0.4 x 0.4 mm. Cocci either c. 1.7 x 1.3-1.7 mm, deltoid m transverse section, dark brown, rugulose, or c. 1.4-1.7 x 1 mm, suborbicular in transverse section, almost smooth (as in lectotype).