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Information Erect herb or soft shrub 1—2,5 m tall, woody at the base, branched or sometimes several-stemmed from the base; stems usually branched especially towards the apex, occasionally simple. Leaves petiolate; blade narrowly to broadly ovate, (45 — ) 50-120 x (30-) 40-70 mm, subglabrous to densely pubescent on both sides, apex acute, base obtuse to truncate, margin regularly crenate; petiole 10—50 mm. Inflorescence borne on the ends of the ascending branches, the central one the largest (50-) 70-100 x 25-30 mm; bracts linear to spathulate, ciliate, 4—5 mm long. Calyx sparingly pubescent, reddish purple; teeth 8—10 mm long. Corolla gentian blue or rarely whitish, 12-20 mm long. Fig. 25: .2.

Information A much-branched perennial herb, 5–7 ft. high, with pubescent branchlets. Leaves long-petioled, ovate, acute, deeply inciso-crenate, densely pubescent, the lower 3–4 in. long. Spikes very dense, finally 2–3 in. long, 1 1/2 in. diam. exclusive of the corollas. Calyx finally 1/2 in. long; teeth very rigid, three times as long as the tube. Corolla bright blue; lower lip 1/3 in. long. Stamens not longer than the lower lip.

Information a much-branched perennial herb 5–8 ft. high; stems and branches obtusely quadrangular, pubescent; leaves long-petioled, ovate, acute, crenate, densely pubescent on both sides, rounded, truncate or shortly cuneate at the base; petioles reaching 2 in. long, pubescent; flowers in dense spikes growing out to 2–3 in. long, 1 1/2 in. in diam. (excl. the corollas); bracts 2–3 lin. long, narrowly linear, slightly wider at the top than the base, pubescent; calyx reaching 1/2 in. long; tube 1 lin. long in flower, narrowly campanulate, pubescent, reaching in fruit 2 lin. long, strongly nerved, curved, with 5 submembranous processes which project above the mouth of the calyx alternating with its teeth and close over its mouth; teeth reaching nearly 5 lin. long, becoming very rigid and spine-like in fruit, pubescent; corolla bright blue; tube sharply deflexed at about 2 1/4 lin. from its base and narrowly cylindric (scarcely 1/2 lin. in diam.) above the deflexion, much dilated to about 1 3/4 lin. broad for 2 lin. below it; upper lip 1 3/4 lin. long, cuneate-oblong, with 4 rounded apical lobes; lower lip 3–3 1/2 lin. long, nearly 2 lin. deep, boat-shaped, with intruded apex, pubescent outside; stamens not exserted beyond the lower lip, upper pair 2 lin. long, lower 3 lin. long; style longer than the stamens, shortly 2-fid. null