. The botany of crop plants; a text and reference book. Botany, Economic. 629 LACTUCA SATIVA (Garden Lettuce) garden IclUue is a tall, annual leafy liefh, with a niilk\- juice. There is llirown up from a short stem early in the season a cluster of leaves varying consideralDly in shape, character, and color, in the different varieties. Later in the season, a "seed stalk" is sent up. Tracy found that, at Washington, I). C, the first appearance. Fig. 255.—Asparagus lettuce, var. angustana. {Aficr CorbcU.) of the seed stalk after sowing seed, varied from
. The botany of crop plants; a text and reference book. Botany, Economic. 629 LACTUCA SATIVA (Garden Lettuce) garden IclUue is a tall, annual leafy liefh, with a niilk\- juice. There is llirown up from a short stem early in the season a cluster of leaves varying consideralDly in shape, character, and color, in the different varieties. Later in the season, a "seed stalk" is sent up. Tracy found that, at Washington, I). C, the first appearance. Fig. 255.—Asparagus lettuce, var. angustana. {Aficr CorbcU.) of the seed stalk after sowing seed, varied from 59 (in Emperor Forcing) to H2 (in Italian Ice) days. The leaves are alternate, denticulate or pinnatifid, sessile or auriculate- clasping, sometimes spinulose-margined, the lowest ones larc^e, and the upper much smaller. The inflorescence is a panicle. The flowers are yellowish or )-ellowish-white, the involucre cylindric, the bracts of which are imbricated in several series, the outer shorter. 'Hie receptacle is tlat and naked. The corolla rays are truncate and tive-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
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectbotanyeconomic
