Intervals shallowly convex; interval 9 ecarinate
apically; apices each with a short acute spine.
In some cases the gaster may be ecarinate
Inflorescence terminal, erect, simple, peduncle terete, 45-50 cm long, 5-7 mm in diameter, totally covered by the bract sheaths; basal peduncle bracts green to reddish, imbricate, vaginiform, only the basal ones foliaceous; sheaths 3.5-4.5 cm long, blades 1-30 cm long; spike compressed, oblong to lanceolate, 17-30 cm long, 6-7 cm wide; floral bracts dark green, glaucous, widely elliptic, 3.2-4 cm long, 2-2.4 cm wide, imbricate but the rachis visible after anthesis, smooth to nervate, ecarinate
, glabrous outside, sparsely brown punctulate-lepidote inside, apex rounded; flowers distichous, ascendent, 13-22 per spike, actinomorphic, corolla helicoiform, subsessile; sepals free, green, oblanceolate, 3-3.4 cm long, ca.
1--Corium with 2 rows of punctures along claval suture near inner angle and a complete row extending the whole length; pronotum laterally ecarinate
Inflorescence broadly capitate, simple, umbellate, apex nearly flat, sunk in the center of the rosette, 8-9 cm long (excluding the petals), 9-12 mm in diameter, 56 to 65-flowered; floral bracts entire to remotely denticulate at the apex, green, membranaceous, distinctly nerved, longitudinally sulcate mainly near the apex, sparsely to subdensely white-lepidote outside, glabrous inside, the outer ones resembling the involucral bracts, ecarinate
, slightly exceeding the ovary, the inner ones narrowly ovate-lanceolate to sublinear-lanceolate, acuminate, ecarinate
or bearing a protruded central nerve and appearing carinate, 45-60 x 8-20 mm, slightly exceeding the ovary.
This has flowered in the Utrecht Botanic Gardens several times with larger sepals (16x3.5 mm, ecarinate
when fresh) and petals (25x4 mm) and with an elongated peduncle (3.5 cm).
1 cm wide, the lower ones elliptic with an attenuate apex, the upper ones ovate with an acuminate apex, ecarinate
, exceeding the stipes, shorter than the spikes, slightly lepidote, spreading, nerved; branch ca.
3 cm long, sepals light green, ecarinate
, oblong, obtuse or acuminate, 2-2,2 cm long, petals dark violet, stamens exserted, filaments of different size, style exserted.
strongly asymmetrical with a well developed lateral wing equaling to exceeding the distal portion of the midnerve, with mucronulate to spinescent apex) and usually ecarinate
8 x 4 mm, free, entire, green, glabrous or nearly so, the adaxial ones carinate with keels decurrent on the ovary, the abaxial one ecarinate
; petals sublinear-spatulate, obtuse to subagute and minutely apiculate, 11-12 x 3 mm, free, erect at anthesis except for the suberect apex, the basal 2/3 greenish and the apical 1/3 white, bearing 2 digitate-lacerate to irregularly scalloped appendages ca.
4 cm in diameter (including floral bracts); floral bracts narrowly subtriangularovate, apex acuminate, distinctly canaliculate, navicular, strongly recurved, slightly exceeding the petals, greenish-yellow toward base and yellow-green near the apex and margins, thin in texture, abaxially densely to subdensely white-lepidote, nerved, adaxially inconspicuously and sparsely white-lepidote to glabrous, 25-29 x 10-13 mm, the basal ones ecarinate
, the upper ones obtusely if at all carinate, margins subdensely to laxly spinose, spines narrowly triangular to acicular, prevailing retrorse, uncinate, pale yellowish-castaneous, 0.5-1.5 mm long, 2-5 mm apart.
11 am to 19 pm, with a weak odor, strongly downwardly secund at anthesis (in lateral braches) to divergent (in the terminal branch), densely arranged, 42-43 mm long (not including the stamens); pedicels stout, 5-6 mm long, 7-8 mm in diameter at the apex, green, glabrous; sepals elliptic, apex obtuse and slightly emarginate, 27-28 x 13 mm, inconspicuously white-lepidote inside, glabrous outside, free, ecarinate
, yellow, distinctly convex, thinly coriaceous toward the apex, thick at the base; petals narrowly elliptic, apex narrowly emarginate, 35 x 13-14 mm, yellow, erect to slightly suberect and forming a tubular corolla ca.10 mm in diameter at the apex, bearing at the base 2 suboblong to obovate, acute, subobtuse to obtusely and irregularly bidentate, ca.