ONAGRARIE^E 575 



Hypocotyl undeveloped. 



Cotyledons immediately after germination oval, obtuse, with a 

 slightly prominent, apical tooth, entire, very shortly petiolate, soon 

 becoming spathulate, with an oval, entire tip representing the true 

 cotyledon and a linear-cuneate innovation at the base, generally 

 with a minute or obsolete tooth on each side, distinctly but shortly 

 petiolate, glandular-pubescent, ultimately (nineteen days after ger- 

 mination) (fig. 869) they become narrowly spathulate or linear, 

 with an oval tip, sometimes narrower than the innovation, which 



PIG. 3G8.CEnothera bistorta, x 3. 



has one to four or more obsolete teeth on each side, and gradually 

 tapers into a long petiole-like base, with a short true petiole ; the 

 lamina is glabrous at the apex and thinly hairy elsewhere, with a 

 distinct midrib and obscurely reticulate in a fresh state, tapering 

 down into the petiole, dull green slightly spotted with black, 5-10 

 mm. long, T5-2 mm. wide ; petiole flattened above, convex on the 

 back, suddenly dilated at the base and forming a little cup round 

 the plumule, somewhat pubescent. 



