90 



YELLOW WOOD SOKREL. 



The leaves are arranged alternate on the stem, compound 

 and trifoliate, consisting of a long petiole, with 3 leaflets. 

 The form of these leaflets is a study. They are broad and 

 notched above so as to present 2 rounded lobes at the apex 

 the cordate form inverted (c), or obcordate. The venation 

 is also to be studied, whether the leaf be palmately trifoliate) 

 with the leaflets all sessile alike (as if cut from a palmi- 

 veined leaf), or pinnately-trifoliate, with the terminal leaflet 



Oxalis stricta : 3, the united stamens ; 4, 5, stamens ; 6, the 5 pistils ; 7, 8, sections 

 of the fruit ; 9, seed, 10, testa, 11, naked ; 12, embryo. 



stalked as in Bulbous Crowfoot (p. 50) or better, in the gar- 

 den Bean. This question let the reader decide. 



Inflorescence. Next arises the inquiry, Where is the 

 axil of the leaf ? It is analogous to the arm-pit the inner 

 angle between the petiole and the stem (a). From this 

 point issues the bud which develops into a branch, and in 

 this case, at least, the peduncle which bears the umbel of 

 flowers. Hence the inflorescence is axillary and umbellate.* 



THE FLOWER EEGION". The flowers of Sorrel, like those 



* Not truly umbellate, however, as it becomes a cyme when the flowers are more 

 than 3, 



