Araceae Family

HannaSanAndres 6,522 views 20 slides Sep 18, 2011
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Araceae

Terrestrial Plant Habitat Symplocarpus foetidus (skunk cabbage) Arisaema triphyllum (jack-in-the-pulpit)

Aquatic Plant Habitat Orontium aquaticum (golden club) Lemna trisulca (star duckweed)

Shrub Plant Habit Aglaonema commutatum (Philippine evergreen)

Vine Plant Habit Syngonium podophyllum (arrowhead vine)

Herb Plant Habit Anthurium cordatum (organ mountain laceleaf )

Roots -often mycorrhizal , without root hairs

Stems - rhizoomatous , cormose , tuberous, or reduced -can be aerial, creeping, subterranean, or appressed -climbing -frequently scandent , rarely erect, hardened, and armed, or not differentiated into stem or leaf Colocasia esculenta

Leaves - simple, bifacial, spiral, or distichous , sometimes highly divided or fenestrate (often exhibiting heteroblasty ), with parallel, penni -parallel, or netted venation

- terminal, many-flowered spadix (with a sterile apical portion in some), usually subtended by a prominent, often colored spathe , or reduced Inflorescence

Flowers - small, bisexual or unisexual (female flowers often proximal, and the male distal on a spadix ), actinomorphic , sessile, ebracteate , hypogynous , sometimes foul-smelling (A) Early stage of development of the inflorescence showing the appendix (smooth upper portion) and the floral zone (lower portion with floral primordia ). The arrow indicates the separation between the appendix proper and the basal stipe portion of the inflorescence . ( B) floral portion of the inflorescence: B, bristle; M, male flower ; F, female flower; arrows , atypical flowers; asterisk, nearly enclosed ovary. ( C) Early stage of initiation of female flowers. ( D) Development of the ovary wall ( O) of female flowers ( E) Close up of two atypical flowers (arrows).

Perianth - biseriate and 2+2 or 3+3 [4+4] or absent, apotepalous or basally syntepalous , a hypanthium absent

Stamens - 4, 6, or 8, distinct or connate, antitepalous in bisexual flowers; anthers are poricidal , longitudinal, or transverse in dehiscence

Gynoecium - syncarpous , with a superior ovary, 3 carpels , usually as many locules as carpels , style and stigma one and short or absent; placentation is variable; ovules are usually anatropous and bitegmic

Fruit - typically a multiple of berries, less often dry, e.g., of utricles

Seeds - oily (sometimes also starchy) endospermous (rarely endosperm absent) with a sometimes fleshy seed coat Jack-in-the-pulpit  Arisaema atrorubens

-traditionally divided into several subfamilies Araceae

Lemnaceae / Lemnoideae small, thalloid to globoseaquatics with very reduced flowers

Calloideae -often found in marshy habitats in the northern hemisphere.  -no trichosclereids in flowers -has only one genus: Calla Calla palustris

Pothoideae -consists of four genera namely ,  Anthurium , Pothos , Pedicellarum and Pothoidium . Anthurium andraeanum
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