founded on the S trice hire of their Seedlings. 91 
Anthericum Liliago . 
Fig. 5. Outline of seedling B L , preserved in spirit, x Vi- C E - s 0 
Fig. 6. From microtome series through seedling B x , just above first node. The 
section cuts each plumular trace twice : in situ within the first leaf (A, B, C), and 
also as they approach the double trace of the cotyledon in two groups (Pl lt PIP). 
X 190. 
Fig. 7. From same series, -14 mm. below Fig. 6. The phloem is in two 
masses, but there are four distinct groups of protoxylem, px L , px^, px s , px{. 
X 190. 
Arthropodium cirrhatum. 
Fig. 8. Outline of seedling B x , preserved in spirit, x 1 / 1 . (E. S.) 
Fig. 9. From microtome series through seedling B t , above first node. The 
double trace from the cotyledon is moving towards the plumular traces PL 
x 250. 
Fig. 10. From same series, «i8 mm. below Fig. 9. The whole stele has been 
somewhat twisted in its descent. But it is clear from intermediate sections that 
px x represents the cotyledonary and px x the plumular protoxylem. The stele 
is root-like and diarch, but at + , + , are two small protoxylem groups in course 
of extinction, x 250. 
PLATE V. 
Allium neapolitanum. 
Fig. 1. From microtome series through seedling A x . Transverse section of 
embryonic stem-bud enclosed within enlarged base of cotyledon. Double bundle 
in cotyledon : three strands in first leaf, x 75. 
Fig. 2. From same section as Fig. 1. Double bundle of cotyledon enlarged, 
x 200. 
Fig. 3. From same series, .27 mm. below Fig. r, through first node. The 
phloem of the slender plumular trace has divided, and one branch fuses with each 
of the two cotyledonary phloem groups, x 200. 
Fig. 4. From same series, .04 mm. below Fig. 3. Diarch root-stele, x 75. 
Fig. 5. From same section as Fig. 4. Stele enlarged, x 200. 
Zygadenus elegans. 
Fig. 6. Outline of seedling A 3 , drawn from life, x Vi* (E. S.) 
Fig. 7. Transverse hand-section through petiole of cotyledon, showing single 
bundle, x 75. 
Fig. 8. From same section as Fig. 7. Bundle enlarged, x 200. 
Fig. 9. From microtome series through seedling A 3 . Transverse section of 
young stem-bud enclosed within enlarged base of cotyledon. Single bundle in 
cotyledon : three strands in first leaf, x 75. 
Fig. 10. From same section as Fig. 9. Bundle enlarged. 
Fig. 11. From same series, «i8 mm. below Fig. 9, through first node. A single 
plumular trace meets that from the cotyledon : both open out as they approach 
each other, and the phloem groups unite in pairs, x 200. 
Fig. 12. From same series, *07 mm. below Fig. 11. Diarch root-stele indicated, 
but not yet formed. The upper protoxylem group is derived from the cotyledon ; 
the lower from the plumular trace, x 200. 
