84 



PlTTO SPORACEAE. 



12. Low, spreading, often with prickles. R. oxyacanthoides. 

 Larger, usually unarmed. R. hirtellum. 



13. Bud-scales keeled, more or less silky. R. Cynosbati. 

 Scales not keeled, glabrescent. (European gooseberry). 



R. Grossularia. 



14. Stems with nearly white exfoliating epidermis. 



R. oxyacanthoides. 

 Twigs buff. (3). R. alpinum. 



PITTOSPORUM. Incense. 

 (Family Pittosporaceae). 



Large shrubs: evergreen. Twigs 

 moderate, at first hairy, terete, 

 short, often enlarged at the end 

 of the season's growth: pith 

 small, white, round, continuous. 

 Buds solitary, sessile, the lateral 

 minute and subglobose with about 

 3 exposed scales, the terminal 

 larger, ovoid, with some half- 

 dozen ciliate scales. Leaf-scars 

 alternate, clustered toward the end 

 of the season's growth, broadly 

 crescent-shaped, somewhat raised: 

 bundle-traces 3: stipule-scars lack- 

 ing. Leaves simple, entire, spatu- 

 late-obovate in the following. 



An odoriferous resin, produced 

 in passages that are characteristi- 

 cally distributed in the tissues and 

 which is especially abundant in 

 the fruit, renders this a favorite 



source of incense for church purposes in the Azores. 



Leaves unvariegated. P. Tobira. 



Leaves variegated. P. Tobira variegatum. 



