ONAGRARIE^E 



565 



Primary root tapering downwards and furnished with lateral 

 fibres, ultimately superseded by strong adventitious roots from 

 below and above the cotyledonary node. 



Hypocotyl very short and soon becoming indistinguishable from 

 the root. 



Cotyledons variable in outline, with two or three alternate, 

 flexuose, incurved nerves on each side of the midrib discernible only 

 by transmitted light, glabrous, deep green above, paler beneath ; 

 lamina 4-5-5 mm. long, and about as broad except when ovate; 

 petiole semiterete, shallowly channelled above, glabrous, slightly 

 connate at the very base, 2' 5-6 mm. long. 



FIG. 362. Clarkia integripetala, x 2. 



Stem herbaceous, and developing when about to flower, firm and 

 suffruticose ; primary internodes undeveloped. 



Leaves simple, almost entire, or obsoletely dentate with the 

 teeth often hardly evident, radical and cauline, alternate, exstipulate, 

 petiolate, alternately incurvinerved, obscurely reticulate, glabrous 

 or with a few scattered hairs on the margins of the leaves and 

 petioles in a young state ; deep green above, paler beneath, thin 

 but subcoriaceous and shining on both surfaces ; petioles semiterete, 



