. The botany of crop plants; a text and reference book. Botany, Economic. 422 BOTANY OF CROP PLANTS numerous ovules. Members of the genus are quite regularly visited by insects. The pod is linear, straight or curved, subterete or compressed, two-valved, and tipped with a persistent style. The seeds ("beans") are large and have a prominent, approx- imately central hilum, on one side of which is the micropyle, on the other, the raphe. The embryo is large and occupies the whole of the seed, , endosperm is wanting. The hypocotyl and plumule are prominent; the two large cotyledons are
. The botany of crop plants; a text and reference book. Botany, Economic. 422 BOTANY OF CROP PLANTS numerous ovules. Members of the genus are quite regularly visited by insects. The pod is linear, straight or curved, subterete or compressed, two-valved, and tipped with a persistent style. The seeds ("beans") are large and have a prominent, approx- imately central hilum, on one side of which is the micropyle, on the other, the raphe. The embryo is large and occupies the whole of the seed, , endosperm is wanting. The hypocotyl and plumule are prominent; the two large cotyledons are slightly concave on their inner faces. The germination of the bean, and the bean seedhng, are common objects of study in general botanical courses. Geographical and Species.— Members of the genus Phaseolus are tropical and warm-country plants. According to Britton and Brown, there are close to i8o. Fig. 176.—Common kidney bean (Phaseolus vulgaris). A, spiral keel; B, entire flower. X 2j^. species. A number of "beans" do not fall within the genus Phaseolus, for example, broad bean {Vicia faba), soy bean (Soja max), velvet bean (Mucuna utilis), asparagus or dolichos bean {Vigna sesquipedalis), cowpea or bean {Vigna sinensis),'']ack bean (Cana- valia ensiformis), locust bean {Ceratonia siligna) and hyacinth bean, bonavist or lablab {Dolichos lablab).. 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
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectbotanyeconomic
