Young Plant of Macrozamia Fraseri. 
583 
EXPLANATION OF PLATE XXII. 
Illustrating Miss E. J. Hatfield’s paper on the Anatomy of the Seedling and Young Plant of 
Macrozamia Fraseri. 
The photographs are by Mr. Pittock. 
Fig. I. Young plant with foliage leaves cut off just above stem apex. C. N. = cotyledonary 
node ; Hy. C. — swollen hypocotyl. x about 
Fig. II. Transverse section of stele of young plant (at level D of Text-fig. 8), showing radial and 
tangentially extended xylem of normal vascular ring. r.Xj. = radially arranged secondary xylem ; 
T. Xi. = tangentially extended secondary zylem ; An. = ‘ anastomoses.’ x about 5. 
Fig. III. Transverse section of central portion of young stem (at level F of Text-fig. 8), showing 
xylem of ‘ normal ’ and first 4 anomalous ’ vascular rings. The xylem of both rings and the phloem 
fibres of the normal ring exhibit the phenomenon of tangential elongation. R.x x .*= radially arranged 
xylem of ‘ normal ’ ring ; Tjq. = tangentially elongated xylem of ‘ normal ’ ring ; T. Ph. — tangentially 
elongated phloem fibres of ‘ normal ’ ring ; R. x 2 . = radially arranged xylem of first ‘ anomalous ’ 
ring; t.x 2 . = tangentially extended xylem of first ‘anomalous’ ring; An. = ‘ anastomoses ’ con- 
nected with outgoing leaf-traces, x about 3. 
Fig. IV. Transverse section of inner portion of plant axis at cotyledonary node. (Compare with 
Text-fig. 4.) Shows three, or perhaps four, xylem rings, and these all exhibit the phenomenon of 
angential extension. Lt. — xylem elements of outgoing leaf-traces, x about 3. 
