. The botany of crop plants : a text and reference book. Botany, Economic. CHAPTER XXVI ROSACEA (Rose Family) The Rosaceae are well represented in North Temperate climates. There are about 1,200 species within 65 genera. The most important genera from the crop standpoint are Rubus (raspberry, blackberry and dewberry), and Fragaria (strawberry). Other genera of importance or of interest are Spircea, an ornamental shrub, Potentilla (five-finger or cinque- foil), Cercocarpus (mountain mahogany), and Rosa (rose). Leaves.—The leaves are alternate, either simple (as in some Rubus species), or compou
. The botany of crop plants : a text and reference book. Botany, Economic. CHAPTER XXVI ROSACEA (Rose Family) The Rosaceae are well represented in North Temperate climates. There are about 1,200 species within 65 genera. The most important genera from the crop standpoint are Rubus (raspberry, blackberry and dewberry), and Fragaria (strawberry). Other genera of importance or of interest are Spircea, an ornamental shrub, Potentilla (five-finger or cinque- foil), Cercocarpus (mountain mahogany), and Rosa (rose). Leaves.—The leaves are alternate, either simple (as in some Rubus species), or compound (strawberry, rose). There are two rather prominent stipules, free from or adher- ent to the petiole. Inflorescence.—There are several different kinds of flower clusters in the family. It is a terminal corymb (flat-topped raceme) in Opulaster, either racemose, cymose, corymbose or paniculate in Spircea, terminal or axillary and solitary, racemose or paniculate in Rubus, and corymbose or racemose in the strawberry. It is interest- FiG. 146.—Floral i^g to note the great number of different diagram of Rubus. gQ^jg gf inflorescences in this one family, and (After Wossidlo.) , •'' contrast it with the mustard family, in which the raceme is the one prevailing type, or with the carrot family in which the umbel is,. with the exception of one genus, the only type, or with the sunflower family, all mem- bers of which have a head inflorescence. Flowers.—The flowers (Fig. 146) are regular, and usually perfect. In some cultivated strawberries imperfect flowers 348. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Robbins, Wilfred William, 1884-1952. Philadelphia : P. Blakiston's Son
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