344 SCIENTIFIC AND APPLIED PHARMACOGNOSY 



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FIG. 151. Baptisia: A, seedling plant in its first year, showing the primary root 

 (K), the hypocotyl (H), the cotyledons (Cot), and astern above ground with 

 three green leaves (L). B, a seedling in its second year, showing the base of 

 two aerial stems (St), developed from the axils of the cotyledons; between 

 these stems is the withered base of the first shoot of the seedling. The 

 young rootlets show the production of tubercles which contain the nitrifying 

 bacteria. C, rhizome bearing at the crown a number of over-wintering buds 

 the base of three aerial shoots and two long roots. D, transverse section of 

 part of a root, showing strands of stereome or sclerenchymatous fibers (S), 

 which occur in the secondary cortex (Co); a strand of leptome (L), cambium 

 (Camb.) and medullary rays (P). E, transverse section of part of root-stele; 

 the hadrome or xylem (H) occurs in three rays separated by narrow medul- 

 lary rays (P) consisting of parenchyma; tracheae or vessels (F). F, an ovoid 

 legume, tipped with the long, curved, subulate style. G, one of the 3-foliate 

 leaves, the individual leaflets being obovate. After Holm, Merck's Report,. 

 1908, p. 295. 



