544 



BOTANY OF CROP PLANTS 



.^^ 



berry, or Vaccinium membranaceum, 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- 

 ally actinomorphic (Fig. 224). The calyx 

 (Fig. 225) forms a tube, grown fast to the 

 ovary, the limb (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 



Fig. 224. — Floral 

 diagram of Vaccin- 

 ium. 



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 



