CLASSIFICATION OF DICOTYLEDONS. 



197 



(Pelargonium) of the gardens. The nasturtiums ( Tropceolum) 

 represent another family, mostly tropical, and the wood-sorrels 

 (Oxalis) (Fig. 107, J) are common, both wild and cultivated. 

 The most useful member of the order is unquestionably the 

 common flax (Linum), of which there are also several native 



FIG. 107. Types of Eucyclse (Gruinales). A, wild crane's-bill Geranium 

 (Geraniacese) , x %. B, a petal, x 1. C, the young fruit, the styles united in a 

 column, x %. I), the ripe fruit, the styles separating to discharge the seeds, 

 x %. E, section of a seed, x 2. F, wild flax. Linum (Linacese), x %. G, 

 a single flower, x 2. H, cross-section of the young fruit, x 3. I, flower. J, 

 leaf of wood-sorrel, Oxalis (Oxalidese), x l. K, the stamens and pistil, x 2. 

 L, flower of jewel-weed, Impatiens (Balsaminese), x 1. M, the same, with 

 the parts separated, p, petals, s, sepals, an. stamens, yy. pistil. N, fruit, 

 x 1. O, the same, opening. P, a seed, x 2. 



species (Fig. 107, F). These are types of the flax family 

 (Linacece). Linen is the product of the tough, fibrous inner 

 bark of L. usitatissimum, which has been cultivated for its 

 fibre from time immemorial. The last family is the balsam 

 family (Balsaminece). The jewel-weed or touch-me-not (Impa- 

 tius), so called from the sensitive pods which spring open on 



