Tillandsia erubescens Schldl. 1845 var. arroyoensis Weber & Ehlers var nova J Brom Soc 1983 p30 –1, based on S&D description of type
Differing from the typical variety: all parts are narrower than the type;
Plant caulescent,
Leaves spreading to arcuate secund recurved, equal or shorter than the elongated scape; numerous, densely polystichous, to 2 dm long, covered with a coat of coarse cinereous subappressed scales;
Blades merging imperceptibly with the inconspicuous oblong sheaths, narrowly triangular, attenuate, involute-subulate toward apex, 5-15 mm wide.
Scape erect or decurved, slender, equaling or shorter than the leaves;
Scape-bracts erect, densely imbricate, the lower foliaceous, the upper ovate with a short foliaceous blade, subinflated, membranaceous, roseate, sparsely lepidote, becoming glabrous.
Inflorescence simple polystichous, narrow fusiform with sterile erect bracts at bases and mostly with 2 yellowish-green flowers like the typical variety. few-flowered, densely ellipsoid or fusiform, to 9 cm long and 3 cm in diameter;
axis short, straight, lepidote;
Floral bracts acute, membranaceous about equaling the sepals;
Flowers erect, subsessile.
Sepals lanceolate, acute, 25-35 mm long, membranaceous, white, strongly nerved, glabrous, equally short-connate, the posterior carinate;
Petals tubular-erect, linear, 7 cm long, yellowish green;
Stamens and pistil exserted.
Capsule cylindric, acute; about equaling the sepals.
HOLOTYPE: Mexico: Leon, on road between Dr. Arroyo and La Escondida, alt. 2000 m., leg. Renate Ehlers March 1981, flowered in cultivation Hort. Weber 25.5 1981 - WEB 286.