566 



ON SEEDLINGS 



channelled above, dilated and semiamplexicaul at the base of the 

 radical ones, thinly ciliate at the margin with incurved hairs. 



Nos. 1 to 4. Elliptic, or broadly oval, obtuse, the first or second 

 sometimes apiculate, more or less cuneate at the base. 



Nos. 5 and 6. Gradually 

 more oblong, obtuse, tapering 

 to the base. 



Cotyledons immediately 

 after germination rotund- 

 ovate, entire, sessile or sub- 

 sessile. 



Eight days after germi- 

 nation they are rotund-ovate, 

 or very broad, and deltoid, 

 obtuse, rounded and entire at 

 the apex, slightly cordate or 

 almost truncate at the base, 

 with a distinct channelled 

 petiole about 1-1-5 mm. long. 

 The ultimate form of the 

 cotyledons of this species is 

 evidently subject to variation, 

 but they never attain any 

 great size as in the annual 

 species. They vary from 

 rotund to broadly elliptic, or 



ovate or deltoid, obtuse, more or less suddenly cuneate at the base, 

 petiolate, and sometimes angled at the sides- in the larger ones, 

 which is the only evidence or trace of an innovation in this species. 

 Like the leaves they are glabrous. 



(Enothera rosea, Ait., resembles the foregoing very closely. 



(Enothera taraxacifolia, Sw. (fig. 363). 

 Seeds 2-5-3 mm. long, 1-25-1 '5 mm. wide. 



DEVELOPMENT OF COTYLEDONS. 



The cotyledons immediately after germination are oblong, obtuse, 

 entire, sessile, glandular-pubescent on the upper surface. 



Eight days after germination they are oblong and obtuse, very 

 shallowly emarginate, with long petioles, glandular-pubescent all 

 over, tapering to the base; petiole semiterete, channelled above, 

 densely and shortly glandular-pubescent. 



FIG. 363. (Enothera taraxacifolia, x 2. 



