No. 459.] ANATOMY OF CATALPA HYBRIDS. I3I 





















Teas C. kæmp- | C. bigno- | C. speci- 
| Hybrid. Seri. nioides osa. No. 
Transverse. 
Wood parenchyma confined to the ves- 
sels and the earliest spring wood . x X Re — 3 
Wood parenchyma in TM and 
concentric zones of a ur da 
throughou — — — x I 
Wood tracheids in radial rows 
the outer face of the summer Md 
radially extended opposite and con- 
fluent with the sm ie ve z x X — — 2 
Wood tracheids for ing tw x x C Ln 3 
Wood spades forming ea tan- 
gentia Pu x x — 3 
Ta rachis ina terminal layer of 
2-3 eol oT o T 
Vessels of early | spring wood with 
x x x um 3 
Vessels of early spring wood with- 
ut thylos “ns x I 
pe ad throughout often 
radially compounde Dy x x x eg 3 
Vessels za numerous, chief ys small, 
radially and tangentially co n — — = x I 
— — ra cells wide, low t 
x x x — 3 
Medullary’ a T in cells wide, variable — — "e: x I 
Radial. 
Upper and lower walls of Du cells 
finely pitted x iun x x 3 
Uppe er u. a walls of the ray cells : 
ted . — ER ER Mp I 
Tracheids Lei hexagonal pits in 1-3 3 : 
Tracheids with 1-2 seriate bordered s. : 
Tracheids with hexagonal, very vari- 
able, multiseriate pits > Me x : 
Tracheids with simple pits n 1-2 rows x -= ^ viri I 
Vessels with ullent, q iadi : 
its . X x x = 3 
Vessels with variable, often "much 
elongated, slit-like pits merging 
into scalariform structure . . . = a 4 
Tangential. 
Rays 1-3 cells wide, Mn to medium x x x — 3 
Rays upwards A de. s wide, une- 
qually multis m = ses x : 
Ray cells aeri thick walled, variable — mé er x 
Ray cells oblong, thin-walle x ge ver: au : 
Ray cells hexagonal, thin -walled . c" pr X T : 
Ray cells beu thick-walled . -= x er vue 
Total characters . 15 15 14 13 1797 











