544 



BOTANY OF CROP PLANTS 



berry, or Vaccinium mcmhranaceum, the thin-leaved bil- 

 berry), or in racemes (as in Vaccinium virgatum, southern 

 , black huckleberry, or Vaccinium oxycoccus, 



the European cranberry). The flower 

 pedicels are usually bracted. The small 

 flowers are perfect, sympetalous, and usu- 

 k y -^.j^ 'to/ ally actinomorphic (Fig. 224). The calyx 

 \^^'^^y (Fig- 225) forms a tube, grown fast to the 



ovary, the hmb (free portion) four- to 

 five-lobed or four- to five-cleft, and either 

 persistent or deciduous. The sympetalous 

 corolla is divided into four or five lobes 

 or very rarely into nearly separate petals, as in the cran- 

 berries. The corolla may be either globe-shaped, bell- 

 shaped, urn-shaped, or tubular. There are twice as many 



terminal 



anther 

 •orolla 



Fig. 224. — Floral 

 diagram of Vaccin- 

 ium. 



filament 

 'fn?ctar 



\ (j^iani 

 \ahx tube^ 

 locules wilh , 

 ovules 



Fig. 225. — Flower of Vaccinium. A, median lengthwise section; B, external 



view. 



stamens- as corolla lobes, and they are usually inserted at 

 the base of the corolla; the filaments are commonly flattened, 

 short, and either free or united; the two-celled anthers are 



