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Seedling Anatomy of Cynara scolymus

Walter S. Phillips
Botanical Gazette
Vol. 98, No. 4 (Jun., 1937), pp. 711-724
Stable URL: http://www.jstor.org/stable/2471657
Page Count: 14
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Seedling Anatomy of Cynara scolymus
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Abstract

1. Germination of the seed and development of the seedling of Cynara scolymus are discussed. 2. The embryo shows well defined provascular strands which later differentiate vascular tissue. 3. The primary root is diarch with three clearly defined histogens. The plerome and periblem give rise to the stele and cortex respectively, while the root cap and epidermis are derived from a common histogen, the calyptogen-dermatogen. 4. The order of differentiation of the primary vascular elements is described. 5. The primary endodermal oil ducts arise schizogenously between the layers of the double endodermis. 6. In the transition, the primary xylem of the root in the cotyledonary plane is continuous with the xylem of the midveins of the cotyledons. The lateral bundles of the cotyledons end blindly in the intercotyledonary plane of the hypocotyl. 7. The structure of the double bundle of the cotyledon is described. 8. The midveins of the first foliar leaves anastomose with the lateral bundles of the cotyledons in the hypocotyl.

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