HELIANTHEMUM 69 



leaves in spring. Tlie fruit is a globular woody capsule with 2 to many 

 seeds. [Seeds; twig cuttings.] 



KEY TO THE PITTOSPORUMS 



* Flowers white or nearly so. (A.) 



A. Flowers very fragrant at night, J inch long ; leaves a rich deep 

 green, lanceolate, often undulated at the margin ; seeds numerous 

 in the J-inch pod. Wavy-leaved Pittospokum or Mock 

 Orange (23) — Pittosporum undulitum. 



A. Flowers slightly yellowish with narrow petals, February, March ; 

 leaves sUky- white when young ; seeds 4. Madras Pittosporum 

 — Pittosporum tetraspgrmum. 



A. Flowers pure white and fragrant, J inch broad, in winter; 

 leaves broad towards tip and blunt, dark above, pale below 

 (sometimes variegated.) Common Pittosporum or Tobiea 

 (24) — Pittosporum Tobira. 



* Flowers some shade of yellow. (B.) 



B. Plants clothed with rusty hairs ; leaves about 3 inches long and 

 half as wide ; flowers I inch long, yellow, February to April. 

 PiTTOspORDii (25) — Pittosporum revoltitum. 



B. Plants smooth throughout. (C.) 

 C. Small tree or large shrub with weeping twigs ; leaves 2-4 inches 



long with hooked point. Pittosporum phillyrseoides. 

 C. Shrub 6 feet high ; leaves broad towards tip ; flowers clustered, 



greenish yellow, jasmine-scented. Cape Pittosporum (26) — 



Pittosporum viridiflbrum. 



* Flowers almost black and seeds black ; used in California as wind- 



breaks and hedges. (D.) 

 D. Leaves pale and glaucous below, 2-3 inches long and blunt at 



tip; a pyramidal tall shrub or tree. Karo (27) — Pittosporum 



crassifblium. 

 D. Leaves thin, dull green, 1^-2 inches long and pointed at tip; 



tree-like. Tawhiwhi — Pittosporum tenuifdlium. 



Heli&nthemum. The Eockkose — Helianthemum ChamsBcistus — and 

 the Fkostweed (28) — Helianthemum canad^nse — are beautiful rock- 

 work plants with usually bright yellow flowers an inch ormore in diameter. 

 Some varieties have red or copper-colored blossoms and some are double. 

 The leaves are linear, hairy above and whitish beneath and generally 

 alternate except at base. The plant commonly cultivated, Helianthe- 

 mum Chamaecistus, grows in procumbent mats less than a foot high and 

 the 5-petaled flowers are in nodding racemes with hairy stems. The 



