UNIT SEVEN : ANGIOSPERM
CLASS : 11
Family : Cruciferae
The cruciferae is also known as mustard family. This family includes 375 genera and 3200 species. The plants are found abundantly in northern hemisphere and distributed worldwide. This family includes vegetables flowers and wild varieties. Some economically important plants of this family are :
- Brassica campestris, (TORI) Important for oil and vegetable
- B. rapa, (Turnip) Important for vegetable
- B. nigra, (RAYO) Important for oil and vegetable
- B. oleracea, (CAULI) Important vegetable and Anticancer
- Raphnus sativus (MULA) Important vegetable
- Lepidium sativum (CHAMSUR) Important vegetable
Root: Tap root and branched or modified (fusiform e.g. Raphnus sativus, Napioform e.g. B.rapa), sometimes adventitious e.g. Roripa.
Stem: Erect, herbaceous, branched, cylindrical, solid, hairy or glabrous, green, sometimes stem is condensed or thickened (B. oleraces, R. sativs)
Leaf: Exstipulate, petiolate or sessile, alternate, rarely opposite, simple, cauline and ramal or radical, lyrate, lobed or entire, acute, glabrous, unicostate, reticulate venetation.
Inflorescence: racemose, receme or corymb
Flower: Ebracteate, ebractiolate, pedicellate, hermaphrodite, complete, actinomorphic or zygomorphic, hypogynous, tetramerous, small, white or yellow.
Calyx: sepals-4, polysepalous, sepaloid, sepals in two worls, 2 in each whorl, hairy or glabrous, imbricate aestivation.
Corolla: petals-4, polypetalous, cruciform, each petal consists of limb and claw, alternate with sepals, petaloid, valvet or imbricate aestivation.
Androecium: stamens-6, tetramerous, polyandrous. Anther – bicelled, dithecous, basifixed, introse
Gynoecium: Carpels-2, bicarpellary, syncarpous. Ovary - superior, unilocular or bilocular, placentation parietal. Style – short. Stigma – bilobed or glabrous.
Fruit: Siliqua
Seed: Dicotyledinous and non-endospermic
Floral formula: __________
Systemic position
Kingdom : Plantae
Division : Angiosperm
Class : Dicotyledonae
Subclass : Polypetalae
Series: Thalamiflorae
Order : Parietals
Family: Cruciferae
Distinguishing characters
Herbaceous stem, alternate leaves, racemose inflorescence, ebracteate, tetramerous, sepals – 4, polysepalous, Petals – 4, polypetalous, cruciform, stamens – 6, tetradynamous, fruit is siliqua.
Order : Parietals
Family: Cruciferae
Distinguishing characters
Herbaceous stem, alternate leaves, racemose inflorescence, ebracteate, tetramerous, sepals – 4, polysepalous, Petals – 4, polypetalous, cruciform, stamens – 6, tetradynamous, fruit is siliqua.
Tags:
Biology
Thanks for provided HSEB notes
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