154 CISTACEAE • VIOLACEAE 



CISTUS — continued 



greyish and hairy below, margins recurved. Fls. i, white. Mediterranean 



region. 

 C. populifolius. 6. Clammy. Ls. ov., 2\, long-pointed, heart-shaped base, 



long-stalked. Fls. 3, white with yellow stain. South-west Europe. 

 C. piirpureus. 4. Clammy. Ls, lane, 2, greyish green. Fls. 3, reddish purple 



with dark red blotches. Hybrid. 

 C. salvifolius. 2. Ls. ov., i\, greyish green, wrinkled above, hairy on both 



sides, Fls. i\, white with yellow stain. Mediterranean region. 



{b) Ls. not 2-nerved 



C. corhariensis. 4. Clammy. Ls. ov., 2, hairy, margins wavy. Fls. i|, white 

 with yellow stain at base of each petal. South Europe. (Fig. 68 G.) 



C. villosus. 4. Ls. ov., 2, grey down on both sides, wrinkled. Fls, 2^, purple 

 or rose-coloured, Mediterranean region, (Fig. 68 F.) 



HELIANTHEMUM. Rock Rose, Sun Rose. May-June. E. G (3). 



H. alpestre. Alpine Sun Rose, i, Ls, ov,, lane, f, green on both sides, hair- 

 less or nearly so, Fls. ^, yellow. Alpine regions of Central Europe, 

 Caucasus, and Asia Minor, 



H. alyssoides. 2. Ls. lane, i, grey with dense down, Fls, i i, yellow. South- 

 west Europe. 



H. appeninum (H. polifoliiim). White Rock Rose. i^. Ls. linear, i, grey down 

 on both sides. Fls. i, white, K5 (3 large, 2 small), Europe (including 

 Britain). (Fig. 68 l.) 



H. canuni. Hoary Rock Rose. \. Ls. lane, i, green and hairy above, white- 

 felted below. Fls. \, yellow. Europe (including Britain). (Fig. 68 K.) 



H.formosiim {H. lasianthetnum, Cistiis formosus). Sweet Cistin. 3. Ls. ov., i, 

 downy on both sides, 3-nerved. Fls. i\, lemon-yellow with five purple 

 patches in centre. Portugal. 



H. vidgare. Common Rock Rose. i. Ls. oblong, i, green above, greyish down 

 below. Fls. I, yellow, K5 (3 large, 2 small). Europe (including Britain). 

 (Fig. 68 M.) 



Variety diversifolium midtiplex. Ls. whitish below. Fls, double, dark 



red. 



Variety mutahile. Ls. grey below. Fls. pale rose. 



Family 15, VIOLACEAE. K5, C5, A5, G (3) 

 (Violet, Pansy) 



HYMENANTHERA, Fls. small, inconspicuous, brownish yellow, solitary or 

 in crowded axillary clusters. Fruit a white berry. 



* H. chathamica. 6. E, Ls. alternate, ov., lane, 4, toothed, prominently 

 veined on both sides, short-stalked. New Zealand. (Fig. 78 G.) 



H. crassifolia. 6. April. \ E. Branches grey, stout, rigid, spreading. Ls. 

 obov., I, entire, rounded or notched at apex, hairless, often in clusters. 

 New Zealand. (Fig. 115 H.) 



* Melicytus ramiflorus. 30. June. D. Bark white. Branchlets pale green 



