DKUPACEAE 109 



ing at base to the soon glabrous petiole, ^" or less long : fruit red, %"-'$>" 

 broad. — Of infrequent occurrence. May. 



4. C. molUs (T. & G.) Scheele. 10°-40° high : leaves broadly ovate, 

 truncate or cordate at base, ^V-^V long. 1^-5^ wide : petioles persistently 

 short-tomentose : fruit red, edible, W-\^'' broad. — Common in woods. 

 Probably includes several species. April-May. 



Family 60. DRUPACEAE DC. 

 Trees or shrubs with alternate petioled leaves and perfect regular 

 flowers. Sepals and petals 5 each. Stamens numerous. Pistil solitary, 

 superior, 1-celled, 2-ovuled. Fruit a 1-seeded, edible drupe. 



Flowers white. I. Prunus. 



Flowers pink. 2. Abiygdalus. 



1. PRUNUS L. 



Stamens 15-20. Drupe glabrous. 



Flowers preceding the leaves. 



Leaves pubescent beneath. 1. P. lanata. 



Leaves smooth beneath. 



Leaves ovate-lanceolate. ' 2. P. hortulana. 



Leaves lanceolate. 3. P. angustifolia. 



Flowers following the leaves. 4. P. serotina. 



1. P. lanata (Sudw.) Mackenzie & Bush, n. comb. Wild Plum. 

 10°-20° high : twigs, pedicels and both sides of the calyx-lobes densely 

 short appressed -pubescent even in age: leaves ovate, long-acuminate, 

 sharply serrate, usually strongly pubescent beneath : flowers in umbel- 

 like clusters : calyx teeth not glandular : drupe 9^^-12^^ in diameter. — 

 Common in dry places. April-May. (P. Americana lanata Sudw.) 



2. P. hortulana Bailey. Goose Plum. 15°-30° high : leaves ovate- 

 lanceolate, long-acuminate, thickish, coarsely serrulate, glabrous : pedi- 

 cels glabrous : calyx lobes pubescent on both sides, glandular-serrate : 

 drupe 9^^-12''^ in diameter. — Frequent in bottom lands along the Missouri 

 Elver. April-May. Our form is var. i)/meri Bailey. 



3. P. angustifolia Michx. Hog Plum. 8°-15° high : leaves lance- 

 olate, acute, serrulate, glabrous : flowers cymose : fruit 6^^-9^^ in di- 

 ameter. — Occasionally adventized along railroads near Leeds, Independ- 

 ence and Lee's Summit. 



4. P. serotina Ehrh. Wild Cherry. 30°-90° high : leaves oval- 

 lanceolate, acuminate, serrate with appressed teeth : flowers in spread- 

 ing, glabrous racemes : drupes globose, 4''^ broad. — Bather common in 

 woods throughout. April-May. A form with pubescent racemes occurs. 



2. AMYGDALUS L. 



Stamens 20-30. Drupe velvety. 



1. A. Persica L. Peach. 15°-30° high : leaves ovate-lanceolate, 

 long-acuminate, serrulate, glabrous : flowers large, pink, clustered on 



