558 



ON SEEDLINGS 



The true portion remains small and nearly orbicular and 

 glabrous from first to last, while the leafy portion is linear, 

 obscurely dentate, ciliate and gradually increases in length so 

 as to resemble the true leaves, except in being somewhat 

 narrower. (E. contorta differs somewhat in the foliar portion 

 being very narrow, distinctly crenate- dentate with opposite 

 teeth, in all respects, however, resembling the primary leaves. 

 (E. bistorta (figs. 367, 368) strongly resembles (E. macrantha, 

 but more stages of development are shown. (E. hirta bears 

 some resemblance to (E. contorta, but the foliar portions of the 

 cotyledons like the true leaves are very hairy, while the upper 

 or true portion is smooth. 



Clarkia sp. (fig. 356). 



Fruit a capsule, linear, quadrangular, attenuated at the apex, 

 dehiscing to the middle by four longitudinal valves, four-celled, 



Seed narrowly obovoid, small, flattened on that side to which 

 the raphe is attached ; testa thick, coriaceous, papillose all over, 



PIG. 356. Clarkia sp., x 24. A, longitudinal section of seed : Ch, 

 chalaza ; 1C, tegmen ; OC, testa ; Au, auricle ; E, radicle. B, trans- 

 verse section of seed : Ba, position of raphe ; C, cotyledon. 



dark brown; raphe running along a flattened surface; chalaza 

 apical, somewhat thickened externally and internally to the seed ; 

 hilum and micropyle basal, contiguous. 



Endosperm absent. 



Embryo straight, large for the seed which it completely fills, 

 colourless ; cotyledons broadly oblong, minutely emarginate with a 



