. Contributions from the Botanical Laboratory, vol. 12. Botany; Botany. Fig 3 A Portion of cortical cell of susceptible host showing mature haustorium. X 1000 ' B Portion of cortical region of susceptible host showing intercellular mycelium and penetration of haustoria. x 900. C. Group of epidermal and cortical cells of re- sistant host showing formation of small lobed haustorium. x 750. D. Grant ce 1 from pathological xylem of resistant sten,. x 700. E. Tracheid cells of susceptible host showing haustoria encased in lignified callosities, x 930. F. Epidermal cell of suscepti- ble host showing
. Contributions from the Botanical Laboratory, vol. 12. Botany; Botany. Fig 3 A Portion of cortical cell of susceptible host showing mature haustorium. X 1000 ' B Portion of cortical region of susceptible host showing intercellular mycelium and penetration of haustoria. x 900. C. Group of epidermal and cortical cells of re- sistant host showing formation of small lobed haustorium. x 750. D. Grant ce 1 from pathological xylem of resistant sten,. x 700. E. Tracheid cells of susceptible host showing haustoria encased in lignified callosities, x 930. F. Epidermal cell of suscepti- ble host showing germ tube which has penetrated the cuticle and is growing over the surface of the epidermal cell, x 950. G. Portion of wall of epidermal cell of resistant host showing the path of penetration of the germ tube through the cuticle, x 1900. ] 'Hi ^ I 1935] Hutchinson: Gall-forming Peridermium 829 \\ V/|. > *> \ 1^ < • » y •h f. 0- .C. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original University of Pennsylvania. Botanical Laboratory; University of Pennsylvania. Morris Arboretum. Philadelphia : [s. n. ]
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