CULTIVATED PLANTS: CEREAL AND CULINARY PLANTS.

PRELIMINARY REMARKS ON THE NUMBER AND PARENTAGE OF CULTIVATED PLANTS--FIRST
STEPS IN CULTIVATION--GEOGRAPHICAL DISTRIBUTION OF CULTIVATED PLANTS.

CEREALIA--DOUBTS ON THE NUMBER OF SPECIES--WHEAT: VARIETIES OF--INDIVIDUAL
VARIABILITY--CHANGED HABITS--SELECTION--ANCIENT HISTORY OF THE VARIETIES--
MAIZE: GREAT VARIATION OF--DIRECT ACTION OF CLIMATE ON.

CULINARY PLANTS--CABBAGES: VARIETIES OF, IN FOLIAGE AND STEMS, BUT NOT IN
OTHER PARTS--PARENTAGE OF--OTHER SPECIES OF BRASSICA--PEAS: AMOUNT OF
DIFFERENCE IN THE SEVERAL KINDS, CHIEFLY IN THE PODS AND SEED--SOME
VARIETIES CONSTANT, SOME HIGHLY VARIABLE--DO NOT INTERCROSS--BEANS--
POTATOES: NUMEROUS VARIETIES OF--DIFFER LITTLE EXCEPT IN THE TUBERS--
CHARACTERS INHERITED.

CHAPTER 1.X.

PLANTS continued--FRUITS--ORNAMENTAL TREES--FLOWERS.

FRUITS--GRAPES--VARY IN ODD AND TRIFLING PARTICULARS--MULBERRY--THE ORANGE
GROUP--SINGULAR RESULTS FROM CROSSING--PEACH AND NECTARINE--BUD-VARIATION--
ANALOGOUS VARIATION--RELATION TO THE ALMOND--APRICOT--PLUMS--VARIATION IN
THEIR STONES--CHERRIES--SINGULAR VARIETIES OF--APPLE--PEAR--STRAWBERRY--
INTERBLENDING OF THE ORIGINAL FORMS--GOOSEBERRY--STEADY INCREASE IN SIZE OF
THE FRUIT--VARIETIES OF--WALNUT--NUT--CUCURBITACEOUS PLANTS--WONDERFUL
VARIATION OF.

ORNAMENTAL TREES--THEIR VARIATION IN DEGREE AND KIND--ASH-TREE--SCOTCH-FIR-
-HAWTHORN.