88 KEY AND FLORA 



berry-like calyx, each cell partially divided by a partition 

 from the back, 1-seeded. 



A. alnifolia Nutt. Leaves rounded, serrate towards the apex. 

 Petals narrowly oblong, nearly an inch in length. Fruit, when 

 ripe, purplish, edible. Rather widely distributed and variable. 



II. CRAT^E'GUS, Thorn Apple 



Trees or shrubs, with thorny branches. Leaves simple, 

 toothed or lobed. Flowers white, in corymbs. Calyx tube 

 urn-shaped, with a 5-parted border. Corolla of 5 white, 

 spreading petals, about half an inch long. Stamens 5-20. 

 Ovary 2-5-celled. Fruit containing 2 or 3 bony seeds, either 

 separated or united. 



C. Douglas'ii Lindl. Tree 10-25 ft. high, with thorns on the 

 stems 1 in. long. Leaves ' broadly ovate, l-3 in. long, lobed or 

 cleft and finely serrate. ' Corymb with many flowers. Fruit sweet 

 and insipid, black. This blooms in the spring and is found from 

 northern California to Washington. 



IH. HETEROME'LES (PHOTIN'IA), Toyon', Christmas Berry 



Shrub with evergreen, oblong, serrate leaves and minute 

 stipules. Flowers white in close panicles at the ends of the 

 branchlets, fragrant with a sweet, sickening odor. Receptacle 

 adnate to the ovary, becoming fleshy in fruit and nearly cover- 

 ing the 2 carpels, which are generally 1-seeded. 



H. arbutifolia Roemer, Berries scarlet with mealy pulp, slightly 

 astringent, but edible. In bloom chiefly in July and August; in 

 fruit in November and December. Common in the Coast Moun- 

 tains. 



IV. PY'RUS (MA'LUS), Pear, Apple 



Trees or shrubs, with deciduous leaves which are simple 

 or pinnately compound, serrate/- Flowers in corymbs, white 

 or pink. Calyx top-shaped with the border 5-cleft/ Petals 

 5, spreading. Stamens 20. Styles 5, more or less united at 

 base. Fruit a pome, the 5 cartilaginous carpels forming the 

 core, and the calyx tube becoming a fleshy covering. 



