. The botany of crop plants; a text and reference book. Botany, Economic. COMPOSITE 629 LACTUCA SATIVA (Garden Lettuce) Description.—Common garden lettuce is a tall, annual leafy herb, with a milky juice. There is thrown up from a short stem early in the season a cluster of leaves varying considerably in shape, character, and color, in the different varieties. Later in the season, a "seed stalk" is sent up. Tracy found that, at Washington, D. C, the first appearance. Fig. 255.—Asparagus lettuce, var. angustana. {After Corhetl.) of the seed stalk after sowing seed, varied from 59 (in
. The botany of crop plants; a text and reference book. Botany, Economic. COMPOSITE 629 LACTUCA SATIVA (Garden Lettuce) Description.—Common garden lettuce is a tall, annual leafy herb, with a milky juice. There is thrown up from a short stem early in the season a cluster of leaves varying considerably in shape, character, and color, in the different varieties. Later in the season, a "seed stalk" is sent up. Tracy found that, at Washington, D. C, the first appearance. Fig. 255.—Asparagus lettuce, var. angustana. {After Corhetl.) of the seed stalk after sowing seed, varied from 59 (in Emperor Forcing) to 112 (in Italian Ice) days. The leaves are alternate, denticulate or pinnatifid, sessile or auriculate- clasping, sometimes spinulose-margined, the lowest ones large, and the upper much smaller. The injlorescence is a panicle. The flowers are yellowish or yellowish-white, the involucre cylindric, the bracts of which are imbricated in several series, the outer shorter. The receptacle is flat and n«. The corolla rays are truncate and five-toothed at. 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 & Co
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectbotanyeconomic
