TABLE 1. Morphological comparison between Strobilanthes spathulatibracteata and S in Strobilanthes spathulatibracteata, a new species of Acanthaceae from northern Vietnam

TABLE 1. Morphological comparison between Strobilanthes spathulatibracteata and S. tonkinensis (data from Deng et al. 2010; Lindau 1897 and taken from specimens in HN herbarium)
MorphologicalS. spathulatibracteataS. tonkinensischaractersHabitperennial undershrub, ca. 2 m tallherb, 0.5–1 m tallStemhirsute when young and glabrescent when old, notpubescent, glabrescent, fragrant when dryfragrantLeaf smellnot fragrantfragrantSecondary veins8–11 pairs4–7 pairsPetiole3–5 cm, hirsuteto 2 cm, pubescentLeaf blade indumentumadaxially hirsute when young then subglabrous,both surfaces sparsely pubescent especially on veinsabaxially pubescent, hirsute along the veins andsecondary veinsBract23–25 × 2–5 mm, spathulate10–12 × 2–2.5 mm, bracts linear-spathulateApex of bracttruncate or rounded and retuseobtuseSurface of bractboth surfaces subglabrous (margin long-ciliate withsparsely pubescent and gland-tipped pubescent,gland-tipped hairs), pinnately veined1-veinedBracteolesca. 20 × 2 mm, spathulate, both surfacesca. 5 × 1 mm, linear, pubescentsubglabrous, margin long-ciliate with gland-tippedhairsCalyx2-lipped; lower lip 2-lobed to 1/3 length, upper lipcalyx 5-lobed to base; lobes linear, 8–9 × ca. 1 mm,equally 3-lobed to 1/3 length; lobes oblong, marginsubequal, pubescentlong-ciliate, gland-tipped hirsute; both surfacessubglabrousCorollawhite with purple stripes, 3.5–4.5 cm long; outsidepink to pure white, ca. 3.2 cm long, outside glabrous,puberulent, inside hirsuteinside glabrous except for trichomes retaining styleFilamenthirsute basally, glabrous abovethe longer pair puberulent; the shorter pair glabrousOvarynarrowly obovoid, densely covered with glandularobovoid, gland-tipped pilose at the tiphairsStyleca. 2.5 cm long, sparsely pilose near base andca. 1.5 cm long, glabrousdensely pilose near apexCapsule15–16 × 4–5 mm, apically pubescent8–10 × 2.5 mm, gland-tipped piloseSeedovate to suborbicular, 4–4.5 × 4 mm, pubescent withovate, ca. 2 × 2 mm, pubescentappressed mucilaginous hairs