Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 63. (Budapest 1971)

Kováts, D.: Some histological observations on Lihospermum purpureo-coeruleum L. seedlings

Fig. 3. Rearrangement types of the radicula — hypocotyl, in cross sections and schematically, a: procambium not wholly differentiated (about 1 week old seedling), b, c, d: procambium wholly differentiated (1 week — 1 month old seedling), e: xylem formed into a compact cylinder in the radicula (1 month old, or older seedlings)