Celsia
(named after Olaus Celsius, 1670-1756, professor in the university of Upsal, author of "Hiero-botanicon," a work on biblical botany). ORD. Scrophularineoe. Hardy or half-hardy herbs. Flowers disposed in loose, terminal racemes or spikes. Leaves crenate, sinuate, dentate, or pinnatifid. This genus differs from Verbascum merely in having four didynamous stamens. The seed may be sown in the open borders, in June, and thinned out for flowering, or raised in nursery beds and transplanted. C. Arcturus should be increased by cuttings, young wood striking freely in a cool house or frame. C. Arcturus (Arcturus).* fl. yellow, large; filaments bearded with purple hairs. July to September. l., radical ones lyrate; superior ones oblong. h. 4ft. Candia, 1780. Half-hardy shrubby species. This is a pretty plant for pot culture in a cool house. (B.M. 1962.) C. betonicaefolia (Betony-leaved). fl. yellow, the two superior segments marked each by a purple spot. July. l. ovate-oblong, wrinkled, crenated. Plant hairy. h. 2ft. Algeria, 1824. Half-hardy biennial. (B.M.6066.) C. bugulifolia (bugle-leaved).* fl. yellowish, with curious brown markings. l. stalked, ovate, crenate. h. 1ft. South-east Europe, 1877. Hardy. SYN. Ianthe bugulifolia.
C. cretica (Cretan).* fl. yellow, marked with two rust-coloured spots at the bottom on the upper side; 1 1/2in. in diameter; nearly sessile. June. l. hairy, lyrate-oblong; upper ones oblong. h. 4ft. to 6ft. Crete, 1752. Hardy biennial. (B.M. 964.) C. orientalis (oriental). fl. yellow, shorter than the bracts. June, July. l. lower ones jagged; cauline ones bipinnate; segments narrow. h. 2ft. Levant, 1713. Hardy annual. (S. F. G. 605.)