DICOTYLEDONES : GAMOPBTAL.B. 



655 



Order 1. ERICACEAE. Anthers generally opening by two pores at 

 the top (Fig. 455 A), often furnished with appendages : pollen 

 in tetrads : fruit a capsule, or succulent : a well-developed disc. 



Sub-order 1. RHODODENDROIDEJE. Fruit a septicidal capaui* ; cefoils, fug 

 cious : anthers without appendages. 



Rhododendron ferrugineum and hirsutum, the Alpine Koses, are wild on the 

 continent : other species of Rhododendron (incl. Azalea), from the mountains 

 of Asia and North America, as also species of Kalmia from North America, are 

 cultivated. Daboecia, polifolia, the Irish Menziesia or St. Dabeoc's Heath, 

 Phyllodoce taxifolia, the Scottish Menziesia, and Loiseleuria procumbens, the 

 trailing Azalea, represent the sub-order in the British Flora. 



Sub-order 2. ARBDTOIDE^S. Fruit a berry, or a drupe, or a loculicidal cap- 

 sule : corolla fugacious : anthers usually appendiculate. 



Andromeda Polifolia, the Marsh Andromeda or Wild Rosemary, occurs in 

 peat-bogs, and Arctostapliylos Uva, Ursi and alpina, the red and the black 



Fro. 455. A Flower of Erica : pedicel ; fc calyx ; c corolla ; a anthers. B Fruit of 

 Pyrola rotundifolia : s pedicel ; fc calyx ; / fruit, the loculi of which alternate with the sepals ; 

 g style ; n stiguia. C Flower of Vaccinium Myrtillus : /ovary (inferior); fc calyx ; c corolla. 

 Floral diagram of Erica : the stamens opposite to the petals are faintly shaded. 



Bearberry, on the mountains of Scotland. Arbutus Unedo is the Strawberry 

 tree of Southern Europe, and Gaultheria is the Aromatic Winter-green. 



Sub-order 3. ERICOIDEJE. Fruit usually a loculicidal capsule : corolla per- 

 sistent : anthers usually appendiculate. 



Calluna Erica, the Ling or Heather, with a septicidal capsule and a deeply 

 4 -partite coloured calyx, is common on moors: the principal British species 

 of Erica, are E. mediterranea (or carnea), the Irish Heath ; E. Tetralix, the 

 cross-leaved Heath ; E, cinerea, the grey or fine-leaved Heath ; and E. vagans, 

 the Cornish Heath. Very many species belong to the Mediterranean region, 

 and to the Cape. 



Order 2. EPACRIDACEJ:. The whorl of stamens opposite the 

 petals is usually wanting : the anthers open by one fissure only. 

 Australian plants. 



v. s. B. 



TJ U 



