II.-Genera Or Families

1. Ranunculaceous Plants. Ranunculaceae

* Carpels several, short, one-seeded; (flowers regular.)

† Sepals 4-5 or more, often petal-like, hut no real petals.

(1) Anemone - flowers with a three-leaved involucre. [For the species of the several genera, see page 42 and sequel.]

†† Petals 5 or more, usually more conspicuous than the sepals.

(2) Myosurus - petals small, with a tubular claw.

(3) Ranunculus - petals with a small scale or hollow near the base.

** Carpels several, many-seeded; (flowers regular.)

(4) Caltha - sepals five, large; petals none.

(5) Helleborus - sepals five, large; petals small, tubular.

*** Carpels solitary, many-seeded.

(6) Actaea - flowers nearly regular, small; fruit a berry.

2. Berberidaceous Plants. Berberidaceae

(7) Berberis - sepals, petals, and stamens six each.

3. Cruciferous Plants. Cruciferae

* Pod siliquose, much (at least 3 or 4 times) longer than broad.

† Calyx with 2 evident sacs or pouches at the base.

(8) Cheiranthus - pod compressed; stigmas two-lobed or capitate.

††Calyx equal at the base.

(9) Barbarea - pods linear, four-angled; the valves with a prominent rib.

(10) Arabis - pods linear, compressed; valves nearly flat, with a prominent rib.

(11) Cardamine - pods linear, compressed; valves nerveless.

(12) Alliaria - pods linear, terete, the valves convex 3-ribbed; stalk of the seed flattened and winged.

(13) Dentaria - pods narrow-lanceolate, tapering, compressed; valves flat, nerveless.

** Pod siliculose, less than three times as long as broad.

† Pod (or pouch) dorsally compressed, the valves parallel to the broad partition.

(14) Draba - pouch oval or oblong, compressed; cells manyseeded; filaments simple.

(15) Alyssum - pouch roundish or oval, compressed; cells twoseeded; filaments toothed or winged near the base.

†† Pod (or pouch) laterally compressed at right-angles to the narrow partition, the valves Keeled.

(16) Hutchinsia - pouch elliptical, entire; cells two-seeded.

(17) Teesdalia - pouch emarginate, the valves narrowly winged; cells two-seeded; filaments with a scale-like appendage near the base.

(18) Thlaspi - pouch emarginate; the valves broadly winged; cells many-seeded; filaments simple.

4. Violaceous Plants. Violaceae

(19) Viola - lower petal and filaments of the two lower stamens spurred.

5. Caryophyllaceous Plants. Caryophyllaceae

* Sepals united into a cylindrical tube.

(20) Lychnis - styles five, rarely four; capsule opening in 5-10 teeth at top.

** Sepals distinct or cohering only at the base; (leaves without stipules).

† Capsule opening in 4-5 valves.

(21) Sagina - sepals and petals four or five, the latter entire, sometimes wanting; styles four or five.

†† Capsule opening in 8-10 teeth. ‡Petals entire.

(22) Arenaria - sepals and petals five each; styles three, rarely four.

(23) Maenchia - sepals and petals four each; styles four.

Petals toothed or jagged, not cleft.

(24) Holosteum - sepals and petals five each; styles three, rarely four.

‡‡‡ Petals bifid or cleft.

(25) Cerastium - sepals and petals four or five; styles five, rarely four or three; capsule opening at top with short teeth. (20) Stellaria - sepals and petals five; styles three, rarely five; capsule opening halfway down.