HYyPOCOTYL IN THE GENUS LUZULA. 113 
EXPLANATION OF FIGURES IN PLATE XXII. 
Illustrating Mr. W. Edgar Evans’ paper on ‘‘ The Effect of Environment on the 
Hypocotyl in the genus Lusu/a.” 
Fic. t. Seedling of Luzula purpurea, Link., from sowing made below the soil sur- 
» Showing elongation of the platens 
Fic. 2. Seedling ‘of L. purpurea from surface sowing. «£80. 
Fic. 3. Seedling of Z. maxima, DC., from sowing covenae on soil, showing the 
elongation of both hypocotyl and first internode of the shoot. . : 
Fics. 4-7. Stages in the growth of Z. purpurea seedlings. - DS. 
Fig. 8. Longi — section through hypocotyl and shiasahe in a ; weil of 
mpestris, DC. (slightly diagramatic). x about 400. 
Fic. 9. Traneverse section regio the iypocotyiar teh of ‘2 cue tactots; about its 
e point 1). Highly magnified. 
Fic. to. Trane section through the hypocotylar stele of 2. purgurea, about its 
e point, showing diarch pai ie (normal). Highly magnified. 
Fie. 11, Didgidas of arrangement of vascular bundles at a point above the junction 
of shoot and cotyledon. (Trans. Sect. Z. Me 
Fic. 12, Diagram of arrangement of vascular bundles at the wie of junction of 
shoot and cotyledon. (T. S. Z. purpurea). 
Fics. 13-15. Diagrams showing igen in the passage from the arrangement of the 
bundles shown in Fig. 12 to that found throughout the greater length 
of the hypocotyl. (T. S. hypocotyl, Z. purpurea). 
EXPLANATION OF THE ABBREVIATIONS USED 
IN LETTERING THE FIGURES. 
cot. Seige ph. = phloem. 
en. =endoderm r. es 2,)=root, (primary, — 
f. (1, 2,&¢,)= foliage leaf (ts, 2nd, &c.) a n of fixing root hairs 
hyp. =hypocotyl. 
int. (1.) =internode of shoot (1st). sh. ages of saat: 
n. (1.)=node of shoot (Ist). sht. shoot ax 
p. =remains of perianth and capsule. xy. =xylem. 
