1910] Hall: Studies in Ornamental Trees and Shrubs. 7 



Leaves acute, thin. 



Flowers in terminal clusters: leaves lanceolate or broader. 

 Young foliage glabrous or nearly so. 



Petals about % in. long: flowers rather few (rarely over 20 in 



each terminal cluster). 

 Capsule many-seeded: flowers white, fragrant ....7. P. undulatum. 



Capsule 4-seeded: flowers greenish yellow 8. P. tetraspermum. 



Petals less than % in. long. 



Leaves entire or merely undulate: sepals acute. 



Erect, with leaves 2% to 4 in. long 9. P. eugenioides. 



Half-reclining, with leaves 1 in. long....lO. P. heterophyllum. 



Leaves coarsely toothed: sepals obtuse 11. P. rhombifolium. 



Young foliage and capsules very pubescent. 



Leaves 7 to 10 in. long, abruptly narrowed to a long petiole 



12. P. hawaiiense. 



Leaves smaller, tapering to the petiole. 



Tomentum rusty: leaves 2 to 3 in. long 13. P. revolutum. 



Tomentum white: leaves 4 to 6 in. long 14. P. eriocarpum. 



Flowers axillary, i.e., each from the axil of a leaf. 



Leaves glabrous, flat: flowers yellow 15. P. phillyraeoides. 



Leaves tomentose underneath, margins rolled back: flowers purple 

 and yellow 16. P. bicolor. 



1. P. tenuifolium Gaertn. P. nigricans Hort. 



A shrub or small tree, rarely exceeding 30 ft., of symmetrical and 

 compact growth: bark black: leaves glabrous and shining when mature, 

 oblong or somewhat obovate, acute or rarely obtuse, 1 to 3 in. long, thin 

 or almost membranous, the margins wavy: flowers solitary in the leaf -axils 

 or rarely fascicled: corolla % to % in. long, dark purple: ovary silky: 

 capsule % in. long, globose, 3-valved, glabrous and minutely roughened 

 when mature. New Zealand. 



One of the best sorts for mass planting and for hedges in 

 California. Its clean, thrifty growth makes it desirable for 

 planting near houses and especially for screening undesirable 

 views. An occasional judicious pruning is necessary in order 

 to get a good foliage effect and to hide the stems. 



A yellow-flowered form of this species has just been discov- 

 ered in Berkeley by Miss Katherine Jones. It is represented 

 by but two shrubs growing in a row of normal black-flowered 

 plants, and no other difference can be detected. It will be 

 further studied and propagated for distribution, since the yellow 

 flowers render it more attractive than the ordinary sort. Mr. 

 T. F. Cheeseman, who has made a careful study of the New 

 Zealand species, writes that although he has not known P. tenui- 



