ONAGRARIEJE 573 



(Enothera tenella, Cav., rar. quadrivulnera. 

 Seeds 1-5-1-75 mm. long, 1-25-1-5 mm. wide. 



DEVELOPMENT OF COTYLEDONS. 



The cotyledons are at first very similar to those of OE. Lindley- 

 ana, but gradually become more cuneate at the base. 



Eighteen days after germination they are obovate, emarginate 

 with a minute tooth in the notch, and a more or less evident midrib 

 extending to the apex, petiolate, cuneate at the base, with the upper 

 part or true cotyledon suborbicular, and much larger than the lower 

 foliaceous portion which is characterised by being cuneate, nar- 

 rower, with two small teeth on each side, and minutely ciliate at the 

 margin ; petiole slender, semiterete, channelled above, densely 

 pubescent. 



First pair of leaves opposite, oblong or finally ovate, obtuse, 

 mucronate, with a few small teeth on each side. 



Ultimately there are two slightly different forms. 



(a) The commoner form is obovate-cuneate, emarginate with a 

 tooth in the notch, finely ciliate below the constriction, and having 

 two to three small teeth there, more often slightly alternate than 

 strictly opposite. 



(b) The other form is obovate-oblong, considerably broader in 

 the lower part than in the commoner form, otherwise exactly 

 similar. 



See (Enothera Komanzowii, which is said to be a variety of 

 (E. tenella. 



(Enothera Romanzowii, Ledeb. 



The stages of growth correspond closely to those of (E. tenella, 

 as does also the ultimate form of the cotyledons, the cuneate inno- 

 vation tapering much more gradually into the petiole. 



(Enothera purpurea, Curt. 



Hypocotyl erect, terete, minutely pubescent, 2-5-3 cm. long, light 

 green, tinged with red. 



Cotyledons oblong-obovate, constricted above the middle, emar- 

 ginate, obtuse, petiolate, with a few hairs on the petiole and base of 

 the leaf, otherwise glabrous, light green, distinctly one-nerved. 



Stem herbaceous, erect, terete, minutely pubescent ; 1st inter- 

 node 2-2-5 cm. long ; 2nd shorter. 



First leaves cauline, opposite, ovate or oblong, acute, denticulate, 

 shortly petiolate, hoary, light green, pinnatinerved. 



