This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol3", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
[Elatinoides Wettst. in Engl. & Prantl, Nat. Pfl. Fam. 4: Abt. 3b, 58. 1891.]
Mostly annual spreading or creeping herbs, with pinnately veined, short-petioled entire toothed or lobed leaves, and solitary axillary white yellow or variegated flowers. Calyx 5-parted. Corolla irregular, spurred, 2-lipped, the throat closed by the palate. Stamens 4, didynamous, included; filaments filiform. Capsule subglobose, or ovoid, opening by 1 or 2 terminal slits, pores or valves. Seeds numerous, ovoid, mostly rough or tubercled. [In honor of Jean Kickx, 1775-1831, professor in Brussels.]
About 25 species, natives of the Old World. Type species: Antirrhinum Elatlne L. Leaves ovate-orbicular, cordate or rounded at the base.
1. K. spuria.
2. K. Elatine.
Antirrhinum spurium L. Sp. Pl. 613. 1753. Linaria spuria Mill. Gard. Dict. Ed. 8, no. 15. 1768. Kickxia spuria Dumont. Fl. Belg. 35. 1827. Elatinoides spuria Wettst. in Engl. & Prantl, Nat. Pfl. Fam. 4: Abt. 3b, 58. 1891.
Annual, pubescent all over; stems prostrate, branched or simple, 3'-2° long. Leaves short-petioled, ovate-orbicular, entire, or sometimes dentate, mucronulate at the apex, cordate or rounded at the base, 1/4'-1' in diameter; petioles 1"-2" long; flowers solitary in the axils, small; peduncles filiform, very pubescent, often much longer than the leaves; calyx-segments ovate, acute at the apex, cordate or rounded at the base, one-half as long as the corolla; corolla yellowish with a purple upper lip, the spur curved, about as long as the tube; capsule subglobose, shorter than the calyx; seeds rugose, not winged.
Antirrhinum Elatine L. Sp. Pl. 612. 1753.
Linaria Elatina Mill. Gard. Dict. Ed. 8, no. 16. 1768.
Kickxia Elatine Dumont. Fl. Belg. 35. 1827.
Elatinoides Elatine Wettst. in Engl. & Prantl, Nat. Pfl.
Fam. 4: Abt. 3b, 58. 1891.
Annual, pubescent; stems prostrate, usually branched, slender, 6'-2° long. Leaves short-petioled, ovate, 1/2'-1' long, acute or acutish at the apex, triangular, hastate, truncate, or subcordate at the base, the basal auricles divergent, acute; petioles 1"-3" long; flowers solitary in the axils, about 3" long; peduncles filiform, glabrous, or somewhat hairy, usually longer than the leaves; calyx-segments narrowly lanceolate, acute; corolla yellowish, purplish beneath, its spur slender, straight, declined; capsule subglobose, shorter than the calyx; seeds wingless.
In sandy waste places, Canada (?); Massachusetts to Georgia and Missouri. Naturalized from Europe. Native also of Asia. Called also canker-root. June-Sept.