By K. Kubitzki (auth.), Professor Dr. Klaus Kubitzki (eds.)

Volumes III and IV of this encyclopaedia supply a unique category of the monocotyledons, a gaggle encompassing crops of such a lot diversified life-forms equivalent to aquatics, terrestrial and epiphytic herbs, and tall bushes. Of the 106 households now well-known 104 are taken care of within the volumes, whereas the economically or horticulturally very important grass and orchid households are relegated to 2 next volumes. The class here's in accordance with contemporary molecular reports in addition to at the massive physique of knowledge to be had in this plant team. The wealth and precision of data, but in addition the keys for the id of genera and info on their houses, together with distribution and diversification, make this paintings an enormous resource for either the coed and the practitioner within the fields of natural and utilized plant sciences.

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Extra info for Flowering Plants · Monocotyledons: Alismatanae and Commelinanae (except Gramineae)

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Variegation of the leaf blade, petiole and peduncle is a striking feature of many genera, including several which are well known in horticulture (Aglaonema, Dieffenbachia, Caladium). Variegated leaves also occur in the juvenile plants of some species of Monstera, Philodendron, Scindapsus and Syngonium and in general seem to be more common in plants growing in tropical rainforests on or near the ground. In Caladium and Zantedeschia, necrotic areas provide another mode of attactive leaf variegation.

In many epiphytic Anthurium species endosperm and an embryo. unisexual-flowered genera. Spathe constnctwns may act as "skid zones" (Arum) or, in conjunction with closing movements, as "brooms" to eject pollinators from the female chamber after pollination (Philodendron). g. g. Areae, Bucephalandra) have less obvious functions; in Arum the filamentous pistillodes and staminodes are thought to exclude inappropriately large insect visitors and in Dieffenbachia, the staminodes are food bodies (Young 1986).

The size and shape of the chromosomes are also quite variable. The exceptionally large chromosomes in Anchomanes and Nephthytis (Marchant 1971a) is an important reason for placing these genera in the same tribe. PHYTOCHEMISTRY. The Araceae are well known as a family which includes poisonous plants. g. species of Alocasia, Caladium, Dieffenbachia, Philodendron, Zantedeschia) are known to cause poisoning, particularly wheu vegetative plant parts are accidentally eaten by children and pets. The red berries of Arum are known to be poisonous and the tubers of all e :lible Araceae must be cooked or treated before the'r can be eaten.

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