Lianas or scandent shrubs; branchlets cylindrical, striated, with lenticels, tomentose to glabrescent
, without interpetiolar gland fields.
Abaxial leaf surface glabrescent
and adaxial surface glabrous.
Florets dimorphic; marginal florets female, with well-developed staminodes, corolla bilabiate, outer lip expanded; central florets bisexual, corolla bilabiate; anther apical appendages acute, tails smooth to papillose, filaments smooth to papillose; style bilobed, dorsally papillose to sometimes glabrescent
veluticarpa by its larger laminas with more numerous lateral veins, eglandular petioles, inflorescences borne in the axils of the earliest deciduous leaves, and patchily glabrescent
Florets isomorphic, bisexual, corolla bilabiate; anther apical appendages acute, tails smooth; style bifid, branches apically truncate, crowned by collector hairs Cypselae truncate to constricted at the apex, glabrescent
to pubescent; pappus dimorphic, scabrid to plumose bristles, shorter in the inner floret, capillary to somewhat paleaceous.
6-1 cm in diameter, densely white-lanate to glabrescent
with age, dark reddish near the base and greenish toward the apex; scape bracts not distinguishable from the leaves, spreading to reflexed and gradually reduced in size upwardly.
Benitez 191; Medina and Barrios 2579) have short inflorescences with only 2-3 racemes and relatively narrow leaves, the upper surface glabrescent
and more or less smooth (veinlets not raised), probably due to past occurrence or continuing sporadic hybridization with A.
Scape erect, 1,20-1,30 m long, 1 cm wide in the middle, glabrescent
in the youngest portion; Scape bracts narrowly elliptic to narrowly triangular, dark purplish, 10,2-13,5 cm long, 3-3,4 cm wide, the lowest ones more or less applicate and enveloping, the upper ones reflexed, longer than the internodes, margins with thorns 2-2,5 mm long.
2 cm thick toward the apex, green toward the base, reddish toward the apex, opaque, densely white-lepidote abaxially, trichomes not obscuring the color of the blades, adaxially sparsely and inconspicuously white-lepidote to glabrescent
, nerved adaxially, apex long acuminate-caudate, pungent, margins white-lepidote to glabrous, subdensely spinose, spines 1-1.
19 x 15 cm, inconspicuously and minutely brown-lepidote, pale colored; blades sublinear, not narrowed at base, 59-62 x 13 cm, coriaceous, green, inconspicously and sparsely white-lepidote abaxially to glabrescent
, abaxially densely covered by a dense layer of white wax, apex acuminate, shortly caudate, recurved.
8-3 cm, densely and coarsely white-lepidote abaxially mainly toward the base, glabrescent
to glabrous adaxially, greenish at the base and dark red toward the apex, conspicuously nerved abaxially, densely to laxly spinose, spines narrowly triangular-acicular, 1.
5 cm, thinly coriaceous, strongly nerved mainly adaxially, inconspicously and sparsely white-lepidote to glabrescent
, green, distinctly canaliculate mainly toward the base, apex acuminate-caudate, recurved.