Angiosperm Families


   
 
Family Liliaceae
 
Systematic Position
Division: Angiospermae
 
Class: Monocotyledonae
 
Series: Coronarieae
 
Order: Liliflorae
 
Family: Liliaceae
 
It is commonly called Lily family. It includes about 250 genera and 3700 species that have a cosmopolitan distribution. Around 200 species are available in India.
 
Characteristic Features
Habit: Mostly perennial herbs, stem often modified into bulbs or corms, rarely shrubs and trees (Dracenea, Yucca). Some are climbers (Gloriosa, Smilax). Many are xerophytes (Aloe, Agave and Asparagus).
 
 
fig. 27.13 Dracenea
 
Root: Adventitious, fibrous, sometimes tuberose.
 
Stem: Erect or climbing, branched or unbranched herbaceous, may be modified as phylloclade (Ruscus) or cladode (Asparagus) or bulb (Alium)
 
 
fig. 27.14 - Asparagus
 
Leaves: Radical or cauline, simple or rarely compound well developed or reduced to sheaths or scales, tubular. Venation is parallel and reticulate in Smilax.
 
Inflorescence: Variable, mostly racemose, simple raceme or spike or umbel or panicle. Sometimes solitary cyme (tulips).
 
 
fig. 27.15 - Tulip
 
Flower: Bracteate, actinomorphic, bisexual, pedicellate, homochlamydeous, trimerous, incomplete, and hypogynous.
 
Perianth: Tepals 6, in two whorls, polyphyllous or gamophyllous, imbricate or valvate aestivation.
 
Androecium: Stamens 6, in two whorls of three each usually free or attached to tepals (epiphyllous) anthers dithecous, usually versatile, introse or extrose.
 
Gynoecium: Carpels 3 (tricarpellary), syncarpous, trilocular, two ovules in each locule attached on axile placentation, style simple, stigma trifid, and ovary superior.
 
Fruit: Berry or capsule.
 
Seed: Small, endospermic.
 
 
 
 
 
fig. 27.15a Habit, floral diagram and floral formula
 
Common Examples
Vegetables
 
1. Alium cepa (onion)
 
2. Asparagus racemosus - roots edible, medicinal also
 
3. Alium sativum (garlic) - medicinal use also
 
Medicinal
 
1. Aloe vera extract from the plant used as a purgative and for treating liver disorders.
 
2. Crinum latifolium (Sukh darshan plant)
 
3. Crinum asiaticum for urinary problems
 
4. Smilax zeylanica for curing arthritis
 
Ornamental
 
1. Dracaena termiflora
 
2. Lilium candidum
 
3. Gloriosa superba (glory lily) a fencing plant
 
Fibre Yielding
 
1. Yucca filamentosa
 
Others
 
1. Colchicum autumnale yields an alkaloid colchicine, used for inducing polyploidy in plants artificially.
 
2. Urginea indica (White squill) - extract from bulbs used in making rat poison.
 
 
fig. 27.16 Common Examples of Family Liliaceae
 
 
     
   
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