12. Elatinaceous Plants. Elatinaceae:

(58) Elatine - capsule three- or four-celled, many-seeded.

13. Linaceous Plants. Linaceae:

(59) Linum - sepals, petals, stamens, and styles, five each; capsule ten-celled, ten-valved.

(Go) Radiola - sepals four, connected below, deeply trifid; petals, stamens, and styles, four each; capsule eight-celled, eight-valved.

14. Geraniaceous Plants. Geraniaceae

(61) Geranium - perfect stamens ten, the five alternate ones shorter.

(62) Erodium - perfect stamens five, with five rudimentary ones alternating with them.

15. Hypericaceous Plants. Hypericineae

(63) Hypericum - capsule three- to five-celled, many-seeded.

16. Malvaceous Plants. Malvaceae

* Outer bracts three, distinct, inserted on the calyx.

(64) Malva - styles numerous; capsule orbicular, many-celled, the cells one-seeded.

** Outer bracts united at the base into an involucre surrounding the proper calyx.

(65) Althaea - styles numerous; involucre 5-9-lobed; capsule orbicular, many-celled, the cells one-seeded.

(66) Lavatera - styles numerous; involucre three-lobed; capsule orbicular, many-celled, the cells one-seeded.

17. Tiliaceous Plants. Tillaceae

(67) Tilia - ovary five-celled, the cells with two ovules attached at the inner angle; fruit a small 1-2-seeded globular nut.

18. Balsaminaceous Plants. Balsaminaceae

(68) Impatiens - ovary five-celled, with several ovules in each cell; capsule bursting elastically into five valves, which roll inwards scattering the seeds.

19. Leguminous Plants. Leguminosae

* Stamens monadelphous.

(69) Ononis - calyx nearly equally five-cleft, campanulate, the segments narrow; lower petal or keel beaked; leaves simple or trifoliolate.

(70) Anthyllis - calyx tubular, inflated, five-cleft, segments unequal; keel not beaked; leaves pinnate.

** Stamens diadelplious. † Leaves of three leaflets.

(71) Medicago - calyx five-toothed, nearly equal; keel of corolla obtuse; ovary curved; pod falcate or spirally twisted; leaves trifoliolate.

(72) Melilotus - calyx five-toothed, nearly equal; petals deciduous; keel obtuse; ovary straight; pod subglobose or oblong; leaves trifoliolate; flowers in long racemes.

(73) Trigonella - calyx five-toothed, nearly equal; petals distinct; keel obtuse; pod straight, or slightly curved, eight-seeded, much longer than the calyx; leaves trifoliolate.

(74) Trifolium - calyx five-toothed, unequal; petals persistent, cohering by their claws; keel obtuse; pod oval, 1-4-seeded, scarcely longer than the calyx; leaves trifoliolate.

(75) Lotus - calyx five-toothed, nearly equal; keel ascending, with a narrowed point or beak; style kneed at the base; pod linear, many-seeded, two-valved; leaves trifoliolate.

†† Leaves pinnate, or apparently simple, tendrilled; (pod one-celled, two-valved).

(76) Vicia - calyx five-cleft or five-toothed; style filiform, its upper part hairy all over, or bearded on the under side.

(77) Lathyrus - calyx five-cleft or five-toothed; style dilated upwards, plane on the upper side, and hairy below the stigma.

††† Leaves pinnate, without tendrils. ‡ Pod bursting, imperfectly two-celled.

(78) Astragalus - calyx five-toothed; keel obtuse; pods imperfectly two-celled, the cells formed by the inflexed margin of the lower suture.

(79) Oxytropis - calyx five-toothed; keel with a narrow straight point; pod imperfectly two-celled, the cells formed by the inflexed margin of the upper suture.

‡‡ Pod indehiscent.

(80) Onobrychis - calyx five-toothed, nearly equal; keel obliquely truncate longer than the wings; pod compressed, one-celled, one-seeded.