. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. 42 RUGEL'S PLANTAIN. {Planlago Rugelii.) The seeds arc dark brown to black, varying in length from — They are slightly flattened with sharp angles,. D / * '^ Figure 38 Fig. 38. Rugel's Plantain. and vary in shape from oval oblong to rhomboidal. The surface of the seed is minutely roughened and dull, but with no ridge or lines as in P. major. The cotyledons have the ventral and dorsal position in the seed. The epidermal layer consists of rectangu- lar cells arranged in rows, which, however, are
. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. 42 RUGEL'S PLANTAIN. {Planlago Rugelii.) The seeds arc dark brown to black, varying in length from — They are slightly flattened with sharp angles,. D / * '^ Figure 38 Fig. 38. Rugel's Plantain. and vary in shape from oval oblong to rhomboidal. The surface of the seed is minutely roughened and dull, but with no ridge or lines as in P. major. The cotyledons have the ventral and dorsal position in the seed. The epidermal layer consists of rectangu- lar cells arranged in rows, which, however, are not continuous or parallel as in P. major. This seed greatly resembles P. major but is slightly larger. (Fig. 3S.) GREEN FOXTAIL. {Chat'tochloa viriiUs, L.) YELLOW FOXTAIL. (Chaetochloa glauca, L.) The seeds of these two varieties are different in size, although both have the same general appearance. The seeds of both are fiat on the palet side and very convex on the other. In size they vary from 2—3 in length and from —2 in width. The seeds of the yellow foxtail are usually somewhat larger and less convex than those of the green, and the color o^ the ripe fruit is somewhat different. Glauca is greenish yellow in color, while viridis is from pale green to light brown in color. The histological characteristics of the foxtails are almost identical and it is extremely difficult to separate the two varie- ties when they occur in ground 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 Massachusetts Agricultural Experiment Station. Amherst, : Massachusetts Agricultural Experiment Station, 1907-1974
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