310. Atropa. - Calyx 5-partite; corolla bell-shaped; anthers not opening by pores but by slits; stamens included; fruit a berry, globose, 2-celled.

311. Datura. - Calyx falling; corolla funnel-shaped, angular; stigma 2-lobed; capsule 4-valved, spiny.

312. Hyoscyamus. - Corolla funnel-shaped, tube short, lobes 5, unequal; capsule 2-celled, opening transversely.

Order 55. Scrophulariaceae

313. Verbascum. - Leaves alternate; calyx of 5 sepals; corolla rotate, lobes spreading, unequal; stamens 2 or more, unequal, hairy below.

314. Linaria. - Calyx 5-partite, tubular; corolla personate, spurred below; palate closing mouth; capsule opening by pores.

315. Antirrhinum. - Calyx 5-partite; corolla personate, saccate below, with palate in mouth; capsule opening by pores.

316. Scrophularia. - Calyx 5-lobed; corolla globose, with scale, or staminode; stamens 4; capsule 2-valved.

317. Mimulus. - Calyx prismatical, 5-toothed; corolla ringent, upper lip reflexed at side; capsule 2-valved; seeds numerous.

318. Limosella. - Aquatic; leaves narrow; calyx 5-cleft; corolla bell-shaped, 5-fid; capsule globose, 2-valved; anthers I-celled.

319. Sibthorpia. - Leaves alternate, rounded; calyx 5-fid; corolla rotate, 5-cleft; anthers 2-celled, sagittate.

320. Digitalis. - Calyx 5-fid; corolla tubular or bell-shaped; stamens 2 or 4; capsule septicidal.

321. Erinus. - Calyx 5-fid; corolla salver-shaped, tube short, lobes unequal; capsule 2-celled.

322. Veronica. - Leaves opposite, calyx 4-5-par-tite; corolla rotate, irregularly 2-lobed; capsule flattened, 2-celled.

323. Euphrasia. - Calyx tubular, bell-shaped, 4-fid; corolla tubular, 2-lipped, upper lip 2-fid, not flattened; capsule blunt or notched; seeds angular, not winged.

324. Bartsia (including Eufragia). - Leaves opposite; calyx bell-shaped or tubular, 4-cleft; corolla tubular, upper lip entire, not flattened; capsule pointed; seeds not winged.

325. Pedicularis. - Leaves alternate; calyx inflated, 5-toothed; corolla ringent, upper flattened; capsule acute; seeds many, angular.

326. Rhinanthus. - Leaves opposite; calyx inflated, 4-toothed; corolla ringent, upper lip flattened; capsule blunt; seeds winged.

327. Melampyrum. - Leaves opposite; calyx tubular, 4-toothed; corolla ringent, upper lip flattened at sides, lower furrowed; capsule oblong, flattened; seeds smooth, not winged.

Order 56. Orobanchaceae

328. Orobanche. - Parasite, leafless; calyx 4-cleft, or 2-fid; corolla ringent, 4 5-cleft, deciduous; bracts 1-3.

329. Lathraea. - Parasite, leafless; rootstock fleshy, with thick scales; corolla 2-lipped, upper lip concave, entire; calyx bell-shaped, 4-cleft.

Order 57. Lentibulariaceae

330. Utricularia. - Aquatic; leaves multifid, bearing bladders; flowers yellow; calyx 2-leaved; corolla personate, spurred; stamens at base of corolla lip.

331. Pinguicula. - Bog plants; leaves entire; glandular, radical; flowers blue or pink; calyx 2-lipped, lower lip 2-fid; corolla gaping, spurred; stamens at base of corolla.

Order 58. Verbenaceae

331 bis*. Verbena. - Leaves pinnatifid or 3-par-tite; flowers in terminal spikes; calyx tubular, unequally 5-toothed; corolla-limb oblique, 2-lipped, 5-fid; capsule splitting into 4 granulate nutlets.

Order 59. Labiatae (Lamiaceae)

332. Mentha. - Calyx regular, 4-toothed; corolla 4-fid, tube short; perfect stamens 4; anther-cells parallel.

333. Lycopus. - Calyx regular, 5-cleft; corolla 4-cleft; stamens 2, 2 upper imperfect; anther-cells at length spreading.

334. Origanum. - Leaves broad; spike 4-sided; calyx-teeth 5, equal, veins 10-13, throat hairy; corolla 2-lipped; stamens 4, distant.

335. Thymus. - Procumbent; flowers in whorl, axillary, or in spikes; calyx 2-lipped; corolla 2-lipped; stamens 4, tips spreading.

336. Satureia (Calamintha, Clinopodium). -Flowers in many whorls, flowers loose; bracts small; upper lip of corolla flat; tube straight.

337. Melissa. - Calyx 2-lipped; upper lip of corolla hollow, tube curved, ascending; tips of stamens meeting together under upper lip of corolla; anther-cells diverging.

338. Salvia. - Calyx 2-lipped, tubular; corolla 2-lipped, gaping; filaments with 2 spreading branches.

339. Nepeta. - Calyx 5-toothed; corolla gaping; upper lip flat, straight, 2-fid, notched; anther cells spreading.

340. Scutellaria. - Calyx ovate, hairy in British plant, closed in fruit, 2-lipped; corolla 2-lipped, upper lip hollow; filaments simple, 2 lower anthers 1-celled.

341. Prunella. - Calyx closed at length, ovate; upper lip flat, 3-toothed, lower 2-fid; filaments 2-fid; anthers all 2-celled.

342. Melittis. - Calyx inflated or 2-lipped, membranous, bell-shaped; upper lip of corolla flat; anthers forming a cross.

343. Marrubium. - Calyx tubular, teeth sub-equal; upper lip of corolla straight, erect, flat, lower 3-lobed; 2 lower stamens longest; anther-cells spreading; nutlets flatly truncate.

344. Stachys. - Calyx tubular, bell-shaped, teeth 10, equal; upper lip of corolla hollow; lower lip with lateral lobes reflexed; anthers smooth; nutlets smooth.

345. Galeopsis. - Calyx-teeth 5, spinous; calyx tubular, bell-shaped; upper lip of corolla arched, lower 3-lobed, with 2 teeth on upper side; anthers ciliate; nuts flattened.

346. Leonurus. - Calyx-teeth 5, spinous; calyx tubular, spinous; upper lip of corolla nearly flat, lower 3-lobed; lobes blunt; anthers smooth; nutlets 3-sided, truncate.

347. Lamium (and Galeobdolon). - Calyx bell-shaped, 10-ribbed; upper lip of corolla arched; lower lip entire, with 1-2 teeth each side; anthers hairy; nutlets 3-sided.

348. Ballota. - Calyx funnel-shaped, 10-ribbed; upper lip of corolla hollow, erect; lower lip 3-fid, middle lobe largest; anthers smooth; nutlets blunt.

349. Teucrium. - Calyx tubular, 5-toothed; upper lip of corolla 2-partite; nutlets united.