6. Geraniaceous Plants. Geraniaceae

(27) Geranium - stamens ten, monadelphous; carpels one-seeded.

7. Oxalidaceous Plants. Oxalidaceae

(28) Oxalis - stamens ten; ovary five-celled, the cells containing several seeds.

8. Aceraceous Plants. Aceraceae

(29) Acer - flowers polygamous; calyx five-lobed; stamens seven or nine, rarely five.

9. Polygalaceous Plants. Polygalaceae

(30) Polygala - two inner sepals wing-like; petals three to five adhering to the tube of the stamens, the lower one keeled.

10. Leguminous Plants. Leguminosae

* Stamens monadelphous (i.e. in one parcel).

(31) Ulex - calyx elongated deeply two-lipped yellow, the upper lip with two, the lower with three small teeth at the tips.

(32) Genista - calyx short two-lipped, the upper lip larger twoparted, the lower deeply three-toothed.

(33) Sarothamnus - calyx short two-lipped, the upper with two, the lower with three small teeth at the tips.

** Stamens diadelphous (i. e. in two parcels). † Pod (or legume) continuous, one-celled.

(34) Trifolium - legume few(l-4)-seeded, scarcely longer than the calyx; leaves trifoliolate.

(35) Vicia - legume many-seeded, two-valved; leaves pinnate, tendrilled.

†† Pod (or legume) divided by transverse articulations into one-seeded cells.

(36) Arthrolobium - flowers umbellate, without bracts; legume terete, scarcely contracted at the joints.

(37) Hippocrepis - flowers umbellate, without bracts; keel acuminated; legume much flattened, of numerous joints each curved like a crescent or horseshoe, or having one margin plane the other concave.

(38) Ornithopus - flowers umbellate, bracteated; keel obtuse; legume compressed, the joints equally contracted on both sides.

11. Rosaceous Plants. Rosaceae

* Petals four or Jive.

Fruit a solitary drupe; (calyx deciduous).

(39) Primus - ovary of one free carpel containing two ovules, becoming a succulent fruit enclosing a bard stone containing usually one seed.

†† Fruit consisting of numerous small nuts or drupes; (calyx persistent).

(40) Fragaria - fruit dry, on a succulent receptacle.

(41) Potentilla - fruit and receptacle both dry.

** Petals none.

(42) Alchemilla - calyx double, eight-parted the four outside divisions smaller; stamens four or fewer.

12. Pomaceous Plants. Pomaceae

* Calyx-segments large, foliaceous.

(43) Mespilus - petals large roundish; fruit turbinate, with the upper ends of the carpels exposed; disk dilated.

** Calyx-segments small.

(44) Crataegus - petals large roundish; fruit round or oval, with 1-5 bony 1-2-seeded cells or carpels.

(45) Pyrus - petals large roundish; fruit fleshy, with five distinct cartilaginous 1-2-seeded cells.

(46) Cotoneaster - petals small erect; fruit turbinate, its cells forming distinct nuts cohering to the inside of the fleshy calyx.