Isoplexis
(from isos, equal, and pleko, to plait; the upper segment of corolla is equal in length to the lip). SYN. Callianassa. ORD. Scrophularineae. A genus comprising two species of very handsome greenhouse evergreen shrubs. Flowers in terminal pedunculate racemes; corolla tubular at the base, campanulate; upper segment of limb equal in length to the lip, and, like it, incumbent in aestivation. The species thrive in a compost of sandy loam and leaf mould. Half-ripened shoots will root, during spring, in sand, under a bell glass.
I. canariensis (Canary). fl. golden-yellow, dense; segments of the corolla acute. June. l. permanent, lanceolate, serrated. h. 4ft. to 6ft. Canary Islands, 1698. SYN. Digitalis canariensis. (B. R. 48.) I. sceptrum (sceptre). fl. yellowish-brown, dense; segments of corolla obtuse. July. l. obovate-lanceolate, denticulated. h. 3ft. to 4ft. Madeira, 1777. SYN. Digitalis sceptrum. (S. E. B. 73.)