Phlogacanthus
(from phlox, phlogos, flame, and Acanthus; from the flame-coloured flowers of some species). SYN. Loxanthus. ORD. Acanthaceae. This genus contains about twelve species of tall, stove shrubs or herbs, inhabiting the Himalayan Mountains and Martaban. Flowers whitish, reddish, or greenish, cymose; cymes disposed in long, thyrsoid, terminal spikes, or axillary and shorter; corolla tube large, incurved. Leaves entire, or slightly toothed, often large. For culture, see Justicia.
P. asperulus (slightly rough).* fl., corolla purplish-red, some-what funnel-shaped; tube short, rather gibbous at base; spike terminal, on a quadrangular peduncle. January. l. large, opposite, remote, broadly ovate-lanceolate, obscurely serrate, entire at base, petiolate. h. 3ft. Khasia Mountains, Assam, &c. Shrub. (B. M. 2845 and B. R. 1340, under name of Justicia quadrangularis; L. B. C. 1681, under name of Justicia asperula.) P. curviflorus (curved-flowered).* fl. yellowish, with an elongated corolla. November. l. large, elliptic, acute at both ends, toothed, glabrous. Stems quadrangular, downy. h. 3ft. to 6ft. Khasia Mountains, 1839. Shrub. (B. M. 3783.) P. guttatus (spotted-flowered). fl. yellow, spotted, fascicled; racemes terminal. Spring. l. oblong, attenuated at both ends, sub-crenulated. h. 2ft. India, 1828. Herb. (B. R. 1334.)