. A manual of botany. Botany. 114 MANUAL OF BOTANY 1. The Compound Spike.—An instance of this is seen in the Wheat and certain other grasses. A variety of it is sometimes naet with, as in the Oat, where the main inflorescence is of the form of a panicle, but the ultimate branches are spikelets. m. The Compound Spadix. —This form is seldom met with, as the spadix does not often branch. Instances may be seen in the Palms (fig. 218). B. Forms possessing a Shortened Primary Axis. Of these we distinguish the simple and the compound Umbel. n. The TJmhel.—When the primary axis is shortened, and gives
. A manual of botany. Botany. 114 MANUAL OF BOTANY 1. The Compound Spike.—An instance of this is seen in the Wheat and certain other grasses. A variety of it is sometimes naet with, as in the Oat, where the main inflorescence is of the form of a panicle, but the ultimate branches are spikelets. m. The Compound Spadix. —This form is seldom met with, as the spadix does not often branch. Instances may be seen in the Palms (fig. 218). B. Forms possessing a Shortened Primary Axis. Of these we distinguish the simple and the compound Umbel. n. The TJmhel.—When the primary axis is shortened, and gives off from its apex a number of secondary axes or pedicels of nearly equal length, each bearing a flower, an umbel is formed Fig. Fig. 217. Panicle. (fig. 222), as in the Onion and Cowslip. When the secondary axes themselves divide, and form tertiary axes, which are also arranged in an umbellate manner, a compound umbel is pro- duced. This is seen in the Carrot (fig. 196), the Fennel (fig. 221), and other allied plants, which are hence called umbelliferous, and give the name to the natural order Umbelliferse. In the compound umbel (^g'. 221), the primary umbel a is called the general umbel, and the other umbels, b, b, b, formed by the division of this, partial umbels or umhellules. When the base of the general umbel is surroimded by a whorl of bracts (fig. 196, a), they constitute a general involucre ; and if other bracts, b, b, are arranged in a similar manner around the partial umbels, each of these whorls of bracts forms an involucel or partial. 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 Green, J. Reynolds (Joseph Reynolds), 1848-1914. London, J. & A. Churchill
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