. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches, and a synopsis of the vegetable kingdom. Gardening -- Dictionaries; Plants -- North America encyclopedias. 2012 ZINNIA ZINNIA necessary. Dwarf varieties should be set 14—16 in. apart: taller kinds 2 ft. each way. Zinnias have two kinds of seeds, triangular and heart- shaped. The triangular seeds are long, narrow, thick. 27
. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches, and a synopsis of the vegetable kingdom. Gardening -- Dictionaries; Plants -- North America encyclopedias. 2012 ZINNIA ZINNIA necessary. Dwarf varieties should be set 14—16 in. apart: taller kinds 2 ft. each way. Zinnias have two kinds of seeds, triangular and heart- shaped. The triangular seeds are long, narrow, thick. 2795. Double Zinnias (X 14). and ridged. The heart-shaped seeds are short, broad and flat. Some growers believe that the heart-shaped seeds tend to produce single flowers; others hold the opposite opinion. Generic Description.—Zinnia is a genus of 16 species of annual, perennial and subshrubby plants, mostly Mexican but ranging from Texas and even Colorado to Chile. They have oppo- site, mostly entire lvs. and terminal heads of fls. which are peduncled or sessile. Rays pistillate, fertile : disk yellow or purple, its fls. herma- phrodite, fertile: involucre ovate-cylindric or campanulate, the scales in 3 to many series, broad, obtuse or rounded, more or less colored: akenes laterally compressed. 2-toothed at the summit and frequently 1-awned from the inner angle, rarely 2-awned. Latest botanical revision by Robinson and Greenman in Proc. Am. Acad. Arts Sci. 32:14 (1897). There is a good summary of cultivated Zinnias by Voss in Vilmorin's Blumengartneri. Illustrated his- torical sketch in Gn. 48, pp. 464, 465. A. Plant annun I. B. Akenes of the disk fls. short and broad, obovate, ~-~H lines long. c. Colors various: lvs. clasping, cor- date-ovate or elliptic elegans cc. Color orange: Irs. sessile, nar- rower, lanceolate Haageana bb. Akenes longer, narrower, oblong, S-4 lines Imni. 0. Color of rays yellow: disk yellow, pauciflora cc. Color of rays red or />iii-/>1>'. D.
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