The tree book : A popular guide to a knowledge of the trees of North America and to their uses and cultivation . CHAPTER XXXIX: THE PLUMS AND THE CHERRIES Family Rosacea Genus PRUNUS, B. & H. Trees with bitter, astringent sap, containing hydrocyanicacid. Leaves simple, alternate, generally serrate. Flowers inclusters, perfect, white, with parts distinct. Fruit a fleshy,i-seeded drupe, with smooth skin and stone. KEY TO SPECIES A. Flowers axillary, in sessile umbels; fruit with oval,flattened stone. Plums B. Fruit red or yellow, without bloom. C. Leaves broadly elliptical, taper pointed, dullgr
The tree book : A popular guide to a knowledge of the trees of North America and to their uses and cultivation . CHAPTER XXXIX: THE PLUMS AND THE CHERRIES Family Rosacea Genus PRUNUS, B. & H. Trees with bitter, astringent sap, containing hydrocyanicacid. Leaves simple, alternate, generally serrate. Flowers inclusters, perfect, white, with parts distinct. Fruit a fleshy,i-seeded drupe, with smooth skin and stone. KEY TO SPECIES A. Flowers axillary, in sessile umbels; fruit with oval,flattened stone. Plums B. Fruit red or yellow, without bloom. C. Leaves broadly elliptical, taper pointed, dullgreen, thick; twigs Petioles bearing 2 glands near base of leaf;pit much compressed. (P. nigra) Canada plumDD. Petioles without glands, pit thick. (P. Americana) wild red plumCC. Leaves broadly oval, finely serrate, leathery;pit grooved at back. (P. subcordata) pacific plumCCC. Leaves lanceolate, thin, shining; petioles glandu-lar; pit Twigs stout, stiff, usually thornless; leavesbroad; fruit thick skinned. (P. hortulana) wild-goose plumDD. Twigs slender, supple, thorny; leaves narrow;f
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttrees, bookyear1920
