Elodea is a member of the monocotyledonous natural order Hydrocharideae.
It would appear, then, that the orchid flower differs from the more general monocotyledonous type in the irregularity of the perianth, in the suppression of five out of six stamens, and in the union of the one stamen and the stigmas.
The number of species of orchids is greater than that of any other monocotyledonous order - not even excepting grasses - amounting to 6000, contained in 400 genera.
In 1677 he described and illustrated the spermatozoa in dogs and other animals, though in this discovery Stephen Hamm had anticipated him by a few months; and he investigated the structure of the teeth, crystalline lens, muscle, &c. In 1680 he noticed that yeast consists of minute globular particles, and he described the different structure of the stem in monocotyledonous and dicotyledonous plants.
Some plants, which in most points of their structure are monocotyledonous, yet have reticulated venation; as in Smilax and Dioscorea.
In monocotyledonous plants there is only one seed-leaf or cotyledon, and hence the arrangement is at first alternate; and it generally continues so more or less, rarely being verticillate.
The greatest merit of this book is the use of the number of cotyledons as a basis of classification; though it must be remembered that the difference between the monocotyledonous and dicotyledonous embryo was detected by Nehemiah Grew.
CYPERACEAE, in botany, a natural order of the monocotyledonous group of seed-bearing plants.
The flower has in rare cases a perianth of six scale-like leaves arranged in two whorls, and thus conforming to the common monocotyledonous type of flower.
LATTICE LEAF PLANT, in botany, the common name for Ouvirandra fenestralis, an aquatic monocotyledonous plant belonging to the small natural order Aponogetonaceae and a native of Madagascar.
R) is also a striking example of " definite " growth; it is much branched, the short, thick, curved branches being given off below the apex of the older ones and at right angles to them, the whole forming a series of connected arched axes, truncate at their ends, which were formerly continued into leafy culms. The rhizome is always solid, and has the usual internal structure of the monocotyledonous stem.
To other monocotyledonous families the resemblances are merely of adaptive or vegetative characters.
Some of the fossils referred to the genus Kaidocarpon, and originally described as monocotyledonous inflorescences, are undoubted Araucarian cones; other cones of the same type have been placed in the genus Cycadeostrobus and referred to Cycads.
They are generally considered to represent the inner whorl of the ordinary monocotyledonous b FIG.