. Effects of the rays of radium on plants. Plants. EFFECTS OF EXPOSING GERM-CELLS TO RAYS OF RADIUM 249 Rosette leaves finely and rather copiously pubescent, the longer ones 9-10 cm. long; blades oblong to oblong-spatulate, undulate, longer than the petioles; stems 3 dm. tall, with very long spreading branches on the lower part; stem-leaves spreading; blades oblong to oblong-linear, acute at the apex, shallowly undulate-sinuate; bracts similar to the stem-leaves but much smaller; hypanthium 35-45 mm. long; sepals about 15 mm. long or shorter, one half as long as the free portion of the hypanth
. Effects of the rays of radium on plants. Plants. EFFECTS OF EXPOSING GERM-CELLS TO RAYS OF RADIUM 249 Rosette leaves finely and rather copiously pubescent, the longer ones 9-10 cm. long; blades oblong to oblong-spatulate, undulate, longer than the petioles; stems 3 dm. tall, with very long spreading branches on the lower part; stem-leaves spreading; blades oblong to oblong-linear, acute at the apex, shallowly undulate-sinuate; bracts similar to the stem-leaves but much smaller; hypanthium 35-45 mm. long; sepals about 15 mm. long or shorter, one half as long as the free portion of the hypanthium, the free tips in the bud stout, mm. long; petals 15 mm. long, or smaller, nearly truncate at the apex; capsules columnar, slightly tapering to the apex, about 20 mm. long, rather broader than the bracts. (See plate 12, FIGURES f-k.) The second specimen (plates 11 and 12) is equally as distinctive. The spreading tips of the calyx in the bud (plate 12, figures c and d) indicate the pressure of the stigmatic lobes within, and in many of the buds these lobes force their way through the tip some time before anthesis, a feature seldom, if ever, observed in biennis, and favor- ing cross-pollination instead of the close pollination characteristic of biennis. The plant, about 6 dm. tall at maturity, produced flowers, fruit, and seed in great abundance. The leaves were of a slightly darker green than is usual in biennis, and both they and the bracts are. Fig. 72. Onagra biennis. Radium Culture, No. I5rt. Two Rosettes, one narrow leaved, and one broad leaved, on one Tap-Root. Cf. figure 73, and plates 13 and 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 Gager, C. Stuart (Charles Stuart), 1872-1943. New York
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