. 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. Gardening. LETTUCE soil and of the plant as dry as possible, and by avoiding a too warm and too moist atmosphere. Sub-irrigation (see Irrir/ation) is to be advised for Lettuce forcing. Of varieties, there are two general types, —the cabbage or heading sorts (Fig. 1266j, and the loose sorts (Fig. 1265. Lettuce plant collap
. 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. Gardening. LETTUCE soil and of the plant as dry as possible, and by avoiding a too warm and too moist atmosphere. Sub-irrigation (see Irrir/ation) is to be advised for Lettuce forcing. Of varieties, there are two general types, —the cabbage or heading sorts (Fig. 1266j, and the loose sorts (Fig. 1265. Lettuce plant collapsed with the rot, 1267). The latter are more used because more easily grown, but the former are considered to be the fintr In 1885, Uoff reduced the kinds of Lettuce to 87 va- rieties (4th Rep. N. Y. Exp. Sta.), throwing tbeni into three general groups: (1) leaves roundish or but slightly oblong, spreading rather than upright; (2) leaves ob- long, tending to grow upright; (3) leaves pinnately lobed. These categories were divided into subtribes on minor leaf-characters. In 1889 (Annals Hort.) 119 names of Lettuces were catalogued by North American seeds- men. Lettuce has been in cultivation for over L'.UUO years. l, h. B. Lettuce Lettuce seems never more than when it comes from the greeuliouse during thi paris (,( the year, yet it is acceptable for salad juii]".^.^ ^umI is in good demand the entire year. In <.im n , :it the North, we may have it in all its .lum- until snow flies again in the fall. Usually it is nuich less of a knack, however, to have it in the earlier part of the season and up to August, than in the torrid weather of August and early fall. For early market we start the plants in the green- house during February, and prick them out in flats or sunken thumb-pots filled with rich, fibrous loam, and after thoroughly hardening them by exposure for a week or more in a coldframe, we take the plan
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