Monocotyledons Lucija Spevec 3 d Prva gimnazija Varadin

Monocotyledons Lucija Spevec, 3. d Prva gimnazija Varaždin 26. 09. 2016.

Monocotyledons

Monocotyledons • • flowering plants seeds -> typically contain one embryonic leaf -> cotyledon about 60, 000 species

Cotyledon

Liliales (Liliaceae) • 11 families, 67 genera, and 1, 558 species • sources of food, in the production of drugs and chemicals, and especially as ornamental plants • subtropical and temperate regions -> Northern Hemisphere

• sepals and petals are usually undifferentiated and sometimes variegated • Both perigonal and septal nectarines are present • ovary can be inferior or superior

True grasses (Poaceae) world’s single most important source of food growing on all continents in desert to freshwater and marine habitats Cultivated grasses: barley, wheat, corn, rice, sugar cane • Wild grasses • •

Orchids (Orchidaceae) • 1, 000 genera and more than 22, 000 species • wet tropics • Monopodial: The stem grows from a single bud (Vanillia) • Sympodial: – have a front (the newest growth) and a back (the oldest growth) – They grow laterally rather than vertically, following the surface of their support

Endangered Monocotyledons in Croatia • Liliales o Pasji zub o Procjepak o Zlatni ljiljan • Orchids o 172 species: o Kokoška o Mali kaćun o Gospina papučica

Worksheet • 1. Give two examples of plants that are monocots. 2. What is a cotyledon?

Literature: • https: //cms. uni-konstanz. de/fileadmin/biologie/agdoerken/pdf/Bestimmungs%C 3%BCbungen/Liliaceae. p df • http: //study. com/academy/lesson/monocotyledonplants-examples-definition-pictures. html • Biologija 2, udžbenik iz biologije za drugi razred gimnazije, Bogut, Futivić, Špoljarević, Bakarić • Monocotyledons: A Morphological Study, Agnes Arber • https: //www. britannica. com/plant/monocotyledon