AND ANATOMY OF THE STEM OF LYCOPODIUM. 35 
PLATE 5. 
Fig. 29 Lycopodium clavatum. Seedling. Transverse section of stem: pz., protoxylem ; p., phloem ; 
per., pericycle; e., endodermis ; ci, €, Cs, inner, median, and outer zones of cortex ; e.p., epi- 
dermis. x 100. 
30- Mon Lycopodium clavatum. Seedling. Diagrams showing how protoxylems increase in number. 
is serratum. ‘Transverse section of young plant derived from bulbil: p., phloem; 
æ., xylem; per. pericycle; e., endodermis; c., cortex; t.c., thick-walled cortex which 
surrounds a root running through the stem. x 250. 
36. Lycopodium Selayo. Transverse section of root running through the stem: p., phloem; 
px., protoxylem ; per., pericycle ; e., endodermis ; c., thick-walled cortex of stem. x 250. 
97-44. Lycopodium squarrosum. Diagrams of stem to show changes occurring in the vascular 
cylinder. 
45-50. Lycopodium clavatum. Diagrams of stem to show monopodial branching. 
51-54. 5 complanatum. Diagrams of stem to show dichotomous branching. Phloem- 
areas indicated by dotted lines. 
55. Lycopodium complanatum. Transverse section of stem at a dichotomy: z., smaller xylem- 
elements ; pæ., protoxylem ; p., phloem. x 80. 
56. Lycopodium cernuum. Sieve-tube in longitudinal section. x 65. 
57. i Ps » E sj x 800. 
58. T alpinum. ‘Transverse section of leaf-trace in cortex: z., xylem; per., pericycle ; 
Co cortex. x 300. 
SECOND SERIES.— BOTANY, VOL. VII, 
