296 Ericaceae 



choripetalous flowers. Calyx free from the ovary, 

 4-5-parted or 4^5-cleft, mostly persistent. Corolla regu- 

 lar or rarely somewhat 2-lipped and Irregular, usually 

 4-5-toothed, lobed or divided. Stamens hypogynous, 

 usually as many or twice as many as the corolla-lobes ; 

 filaments mostly separate ; anthers 2-celled, attached to 

 the filament by the back or base, the sacks often pro- 

 longed above into tubes, dehiscent by terminal pores or 

 chinks, often awned. Disk crenate-lobed or often none. 

 Ovary usually 2-5-celled ; style elongated or short ; 

 stigma peltate or capitate : ovules usually numerous, 

 anatropous. Fruit a capsule, berry or drupe. Seeds 

 numerous or sometimes only 1 in each cavity ; endo- 

 sperm fleshy. . 



Fruit granular, baccate. 1. ARBUTUS. 



Fruit not granular, smooth or pubescent, drupaceous. 



2. ARCTOSTAPHYLOS. 



1. ARBUTUS L. 



Trees or shrubs, with evergreen and coriaceous alter- 

 nate petiolate leaves, and white or flesh-colored small 

 flowers in a terminal cluster of racemes or panicles. 

 Bracts and bractlets scaly. Calyx small, 5-parted. 

 Corolla urceolate with 4-5 small recurved teeth. Ovary 

 on an hypogynous disk, 4-5-celled ; ovules crowded on a 

 fleshy placenta projecting from the inner angles of each 

 cell. Style rather long ; stigma obtuse. Fruit a many- 

 seeded berry. 



1. A. Menziesii Pursh. (MADRONO.) Commonly 5-10 in. 

 high; bark exfoliating, deep red; leaves glabrous, elliptic or 

 ovate, green above, glaucous beneath, 5-10 cm. long, entire or 

 those of young shoots denticulate; petioles about 1 cm. long; 

 flowers in an ample terminal panicle or dense racemes ; berry 

 fleshy, red, subglobose, 8-10 mm. in diameter, surface granular. 



Mount Wilson and Sturtevant trails at about 3000 feet altitude, and in 

 Los Tunas Canyon, Santa Monica Mountains. 



