DICOTYLEDONS: GERANIALES. 



677 



The entire plant. Note and describe the habit and character of the 

 plant, i.e., the size, character of branching, character of the root, position 

 and arrangement of the leaves. Compare the "radicle" (lower) leaves 

 with the "cauline" (stem) leaves as to form and insertion. The radicle 

 leaves are more or less deeply lobed or pinnatifid (pinnately cut), while 

 the stem leaves are slender, lanceolate, toothed, and often auricled (with 

 little ears) at the base. 



The inflorescence. What is the kind of inflorescence? Determine the 

 parts of the flower present, as well as the number and arrangement of the 

 members of the flower. What figure which suggests the name of the fam- 

 ily to which the shepherd's-purse and the tooth- 

 wort belong, do the petals make in the flower ? 



The fruit. What parts of the flower are united 

 in the fruit ? Compare the plant with the tooth- 

 wort. 



Construct the floral diagram of the toothwort 

 or shepherd's-purse, or of other cruciferous plant 

 studied. 



Material. Entire plants with 

 flowers and fruit. The plant v 



occurs from early spring to au- 

 tumn, and can be usually obtained 

 in a fresh condition when wanted. 



ORDER GERANIALES. 



1168. Lesson XL The 

 geranium family (Gerani- 

 aceae). The wild cranesbill 

 has a perennial underground 

 rootstock. From this in the 

 spring arises the branched, 

 hairy stem. The leaves are 

 deeply parted into about five 

 wedge-shaped lobes, which 

 are again cut. The peduncles 

 bear several purple flowers(fig. 



564). The floral formula is Branch ? f cranesbill (Geranium macula- 

 as follows: Ca5,Co5,AlO,G5. turn), showing upper leaves, flowers, and pods. 



The wood-sorrel (Oxalis), the balsam or jewelweed (Impatiens), 

 sometimes called "touch-me-not," are members of the same family. 



