. The Characeae of America. 23 In the foreign Ch. stelligera neither stipules nor cortex are devel- oped, but three small cells protrude slightly at the base of the leaf. In Ch. ceratophylla there are frequently three double stipules at the base of each leaf, see Fig. 31, showing the short inflated double stip- ules, camera drawn, x 25 diam. In the Nitellce there is no de- velopment of cortex or stipules, but in a few species of Nitella we find accessory leaves arising from a true verticil. These accessory leaves are more simple than the true leaves; they produce no nodes or fruit, and do not
. The Characeae of America. 23 In the foreign Ch. stelligera neither stipules nor cortex are devel- oped, but three small cells protrude slightly at the base of the leaf. In Ch. ceratophylla there are frequently three double stipules at the base of each leaf, see Fig. 31, showing the short inflated double stip- ules, camera drawn, x 25 diam. In the Nitellce there is no de- velopment of cortex or stipules, but in a few species of Nitella we find accessory leaves arising from a true verticil. These accessory leaves are more simple than the true leaves; they produce no nodes or fruit, and do not subdivide. We find these accessory leaves numerous in our N. hyalina and N. clavata. In the genus Tolypella fruiting organs, both sporangia and antheridia, spring from the basilar cells of the leaf in the verticil, both external and internal, often in large Fig. 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 Allen, Timothy Field, 1837-1902. New York : [s. n. ]
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