22. Saxifragaceous Plants. Saxieragaceae

* Stamens ten.

(96) Saxifraga - calyx five-cleft or five-parted; petals five; styles two, persistent, forming two beaks to the carpels.

** Stamens Jive.

(97) Drosera - calyx deeply five-cleft; petals five; styles 3-5, deeply bifid; capsule one-celled, 3-5-valved, many-seeded.

23. Lythraceous Plants. Lythraceae

(98) Lythrum - calyx tubular, cylindrical, with 8-12 teeth; petals 4-6, longer than the calyx teeth; style filiform.

(99) Peplis - calyx campanulate, with twelve teeth; petals six, minute, fugacious; style very short.

24. Onagraceous Plants. Onagraceae

* Stamens eight; (flowers regular or nearly so).

(100) Epilobium - calyx four-cleft, deciduous; seeds bearded; flowers purplish or white.

(101) oenothera - calyx tubular below, four-lobed; seeds not bearded; flowers large, yellow.

** Stamens two; (flowers very irregular).

(102) Circsea - calyx deeply two-cleft; petals two.

25. Haloragaceous Plants. Haloragaceae

* Stamens eight (sometimes four or six).

(103) Myriophyllum - monoecious; stigmas four, sessile on the ovary; fruit tetragonal, separable into four nuts.

** Stamens one only.

(101) Hippuris - stigma one, sessile on the ovary; fruit a one-celled nut.

26. Cornaceous Plants. Cornaceae

(105) Cornus - petals distinct; fruit a succulent drupe.

27. Umbelliferous Plants. Umbelliferae

* Umbels simple or imperfectly compound.

† Fruit without vittae (oil-cysts); albumen solid (not furrowed) .

Fruit laterally compressed.

(106) Hydrocotyle - fruit flat nearly orbicular, of two carpels, each with five filiform ridges; commissure linear; calyx teeth obsolete.

‡‡ Transverse section of fruit nearly round.

(107) Sanieula - fruit subglobose, covered with hooked spines; without ridges; calyx of five leafy teeth.

(108) Eryngium - fruit obovate, covered with chaffy scales without ridges; calyx of five leafy teeth.

†† Fruit with vittae; albumen furrowed or involute on the inner face.

(131) Torilis - see page 158.

** Umbels compound or perfect. † Fruit not prickly. Albumen solid (not indented with a longitudinal furrow). § Fruit laterally compressed. Leaves compoundly divided. (a) Calyx teeth foliaceous.

(109) Cicuta - fruit roundish-cordate; carpels with five equal broad flattened ridges, the lateral marginal; interstices with single vittae.

(b) Calyx teeth small or obsolete; petals entire.

(L10) Apium - fruit roundish-ovate; carpels with five filiform equal ridges; vittae single in the interstices; involucre none.

(111) Helosciadium - fruit ovate or oblong; carpels with five filiform prominent equal ridges; vittae single in the interstices; involucre many-leaved.

(c) Calyx teeth small or obsolete; petals obcordate or emarginate.