. Genetics in relation to agriculture. Livestock; Heredity; Variation (Biology); Plant breeding. Fig. —Bud mutations in .sports of the Boston fern. At the right (b) is the form, mdgnifica, a dwarf, asexual descendant of the variety, bostoniensis. The fern in the center (a) is a sport from this dwarf. It has a tendency to produce further sports and so could not be depended upon to breed true. At c is shown a-small plant whose single frond resembles magnifica. At d is another sport that already displays instability in having two sorts of fronds. {After Boshnakian.). Fig. 131.—A series of pi
. Genetics in relation to agriculture. Livestock; Heredity; Variation (Biology); Plant breeding. Fig. —Bud mutations in .sports of the Boston fern. At the right (b) is the form, mdgnifica, a dwarf, asexual descendant of the variety, bostoniensis. The fern in the center (a) is a sport from this dwarf. It has a tendency to produce further sports and so could not be depended upon to breed true. At c is shown a-small plant whose single frond resembles magnifica. At d is another sport that already displays instability in having two sorts of fronds. {After Boshnakian.). Fig. 131.—A series of pinnee illustrating progressive variation in division. 1, Var. bos- toniensis; 2, Piersoni; 3, Whitma7ii; 4, Goodi (or gracillima); 5, Magnifica; 6, Craigi; 7, Amerpohli. {Courtesy Brooklyn Botanic Garden.) contains the more delicate, open, lace-like forms, such as Millsii and verona (Fig. 1296, d). The latter has an advantage over several earlier Digitized by Microsoft®. 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 Babcock, E. B. (Ernest Brown), b. 1877; Clausen, Roy Elwood, 1891-. New York, McGraw-Hill; [etc. , etc. ]
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