CHURCH: THE BULB IN COOPERIA DRUMMONDII 361 
Explanation of plates 14-16 
The following remarks refer also to the text figures. FIGS. 7, 12 and 13 in the 
plates and TExT FIGS. I, 4, 5 and 9 are not camera lucida drawings. All other 
and Lomb camera lucida was use e Zeiss camera lucida was employed. 
Leitz-Wetzler compound microscope was used as a rule. IG. 10, however, was 
made with a Zeiss microscope. The jongitudinal sections were cut in a plane at 
tion is indicated for most of the figures. The following symbols are employed: 
b, leaf base; c, cotyledon; cs, cotyledonary eheath; eé, sisi amie f, flower stalk; 
i flower trace; hf, bulb-axis or ‘‘tigelle’”’; /, lam o, open-base leaf; pc, pro- 
mbium; pcs, procambial strand; pm, Fe ete ae stem; 7, root; sc, closed leaf; 
< old flower stalk; #, testa. 
PLATE 14 
Fic. 1. Five-day-old seedling; one half of the seed coats and the endosperm 
has been removed to show the cotyledon; 4h is the hypocotyl, and /, the first leaf; 
see Fics. 2 and 11; scale =I cm. 
Fic Central longitudinal section of five-day-old. seedling, showing the 
sheath, ‘ of the first leaf, i, and the primordia of the second leaf, 2: and be, together 
with the em point, pm; the stippled areas show the location of vascular 
traces; scale = 
Fr 
differentiated from the primordial meristem, pm, but a so that as a whole 
the meristematic tissue of this second leaf occupies an area ia diagonally to the 
reset: axis and surrounding the primordial meristem like a collar; scale = © 
gets 4. Ten-day-old seedling; as the first leaf is thrust out far from the coty- 
isionary sheath into the air the cotyledon elongates and curves downward until it 
is parallel with itself and the vertical shoot, having passed through an angle of 180 
degrees; scale = 1Ic 
Fic. 5 Thirty-seven -day-old seedling; 0: is the base of the first leaf, h, and Is 
is the second leat; ale = 1 cm. 
Fic. 6. cae of the thirty-seven-day-old seedling; scale = 0.1 mm.; 4 and 
ba oe be tranaos 
agram ees relative proportions of na cells, raphide-bear- 
+ 7 
ing ae sak beaten cells and vascular traces; scale = 
PLATE I5 
Fic. 8. Longitudinal section (not quite through ais) of thirty-seven-day-old 
Aes nee young root cutting way through base of aa first leaf; this root arises 
e and at the base of the second leaf; 
Fic. 9. Primordia of the point to sinty- aay ae shown in Fic. 14; 
not a central section; scale = 0.1m 
Fic. 10. Longitudinal section mae central) through slightly developed plant 
to show region, 4, dividing shoot and root in its early formation; h is the first leaf. 
Primordia of bulb shown in Fic. 15. 
