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FOC | Family List | FOC Vol. 19 | Acanthaceae

14. Asystasia Blume, Bijdr. 796. 1826.

十万错属 shi wan cuo shu

Authors: Jia-qi Hu & Thomas F. Daniel

Intrusaria Rafinesque.

Herbs or subshrubs, with cystoliths. Leaves petiolate; leaf blade margin entire to crenate. Inflorescences terminal or axillary, unilateral spikes or racemes, or panicles of these; bracts small, shorter than calyx; bracteoles similar to bracts or sometimes absent. Calyx 5-lobed; lobes equal to subequal. Corolla funnel-shaped; tube expanded distally into a throat; limb ± 2-lipped, often appearing subactinomorphic with 5 ± equal lobes; lobes ascending cochlear in bud. Stamens 4, included in or partially exserted from corolla tube; anthers 2-thecous; thecae parallel to sagittate to subperpendicular, equally to unequally inserted, base muticous or with a small basal appendage; staminodes 0. Ovary with 2 ovules per locule; stigma capitate, 2-lobed or 2-dentate. Capsule with a solid stalk at base, clavate, up to 4-seeded; retinacula present. Seeds lenticular, lacking trichomes.

About 40 species: tropical and subtropical regions of Old World; four species (one introduced) in China.

1 Corolla ± subsalverform with cylindric basal portion of tube at least 1.5 × as long as throat and limb combined.   1 A. neesiana
+ Corolla ± campanulate with cylindric basal portion of tube less than 1.5 × as long as throat and limb combined   (2)
2 (1) Leaf blade ovate to elliptic, base truncate to rounded; corolla yellow or white.   2 A. gangetica
+ Leaf blade lanceolate to ovate-lanceolate or narrowly ovate, base attenuate; corolla red or purplish red   (3)
3 (2) Leaf blade (1.2-)1.8-2.8 cm wide, margin entire; corolla 3.5-4 cm, lobes ca. 5 mm wide.   3 A. salicifolia
+ Leaf blade 3-5 cm wide, margin undulate-crenulate; corolla ca. 2.2 cm, lobes ca. 3.2 mm wide.   4 A. nemorum

Lower Taxa


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