564 ON SEEDLINGS 



cotyledon only by being minutely ciliate at the margin and by pos- 

 sessing a distinct sunken midrib like the true leaves. 



Finally they become elliptic, emarginate with a minute tooth in 

 the notch, tapering most to the base and petiolate, minutely ciliate 

 on the margin and petiole, without any toothing (fig. 361). 



Clarkia integripetala, ? Hort. (fig. 362). 



Seeds l-25-l'7o mm. long, '75-1 mm. wide. 



Cotyledons immediately after germination shortly oblong, obtuse, 

 emarginate with a minute tooth in the notch, shallowly auricled at 

 the base, sessile, glabrous. 



Hypocotyl with a few minute glands. 



Primary root furnished with root-hairs. 



The day after germination the cotyledons have become trans- 

 versely oval, and a shallow semicircular depression, and a grey 

 midrib have appeared at the base of each. 



Next day a tooth on each side near the cuneate base denotes 

 the point where the true cotyledon ends, and the foliar portion 

 begins, and four days after germination they are obovate and very 

 shortly petiolate ; upper part oblate, emarginate, with the apical 

 tooth now almost obsolete : lower part rotund-subcuneate with one 

 to two small teeth on each side, shorter and narrower than the upper 

 part, minutely and papillosely pubescent. 



Eight days after germination they are as a whole oblong, dis- 

 tinctly petiolate ; upper part oblate, emarginate with the tooth in 

 the notch almost obsolete ; lower part broadly oblong with three 

 to four minute teeth on each side, and a distinct reddish or silvery 

 midrib, minutely pubescent and ciliolate, suddenly narrowed into 

 the petiole. Hypocotyl long, minutely pubescent. 



Seventeen days after germination (fig. 362) the lower part is 

 broadly ovate with three to five teeth on each side and one to two 

 pairs of very faint somewhat curved nerves running towards the 

 marginal teeth, and a silvery midrib terminated above by a trans- 

 verse brown line, papillosely pubescent all over ; upper part oblate 

 or oval, emarginate, with a tooth in the notch, minutely and 

 much less conspicuously pubescent than the lower part ; petioles 

 semiterete, channelled above, shortly pubescent all over. Hypocotyl 

 pubescent. 



First two leaves opposite, equal, obtusely serrate, ovate, obtuse, 

 oppositely and alternately incurvinerved, pubescent all over, petiolate. 



(Enothera frnticosa, L. 



Seeds 1'25-rS mm. long, '33-*5 (rarely '75) mm. wide. 



