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Isotoma (From isos equal and toma)

(from isos, equal, and toma, a section; segments of corolla equal). ORD. Campanulaceae. A genus comprising eight species of stove or greenhouse herbaceous perennials, formerly included under Lobelia. Flowers in axillary or terminal racemes. Leaves alternate, entire, largely dentate or pinnatifid. For culture, see Lobelia.

I. axillaris (axillary-flowered). fl. blue; corolla flat, with long green tubes; peduncles axillary, elongated, and one-flowered. Autumn. l. sessile, pinnatifid, toothed. h. 1ft. Australia, 1824. Greenhouse perennial. (B. M. 2702, under name of Lobelia senecioides.) I. a. subpinnatifida (sub-pinnatifid) has the laciniae of the leaves longer than in the type, and not unfrequently again pinnatifid. SYN. I. senecioides subpinnatifida (under which name it is figured in B. M. 5073). I. Brownii (Brown's). fl. purple, racemose. Autumn. l. linear, quite entire. Stems almost simple. h. 1ft. West Australia, 1829. Greenhouse annual. (B. M. 3075, under name of Lobelia hypocrateriformis.) I. longiflora (long-flowered). fl. white; tube of corolla very long and slender. Summer. l. obovate-lanceolate, coarsely toothed, pubescent. West Indies, 1752. Greenhouse perennial. A very poisonous plant. (B. R. 1200, under name of Lobelia longiflora.) I. senecioides subpinnatifida (Sececio-like, sub-pinnatifid). A synonym of I. axillaris subpinnatifida.