ARRANGEMENT OF FLOWERS ON THE STEM 189 
a OA 
v0 CEH Z 4 
i V7 #¥ 
iN fi \ | 
\ 
a 
Fic. 133.— Head of Yarrow. 
A, top view. (Magnified.) B, lengthwise section. (Magnified.) re, receptacle ; i, 
involucre; r, ray-flowers; d, disk-flowers ; c, corolla; s, stigma; ch, chaff, 
or bracts of receptacle. 
Fic. 134. Fie. 135. —Compound Umbel 
Panicle of Oat. of Carrot. 
