Prunus americana
 
American Plum

Developing Thorn

One Mile West of Melita
28-July-2015

bullet

Americana: Answers to key questions in Budd's Flora leading to this species. 
bullet

teeth of leaves deeper; NOT [teeth of leaves not very deep]

bullet

teeth of leaves not gland-tipped; NOT [teeth of leaves tipped with a small gland]

bullet

flowers in small umbels or corymbs; NOT [flowers in long racemes at the ends of the branches]

bullet

lobes of sepals not toothed

bullet

lobes of sepals not glandular

bullet

fruit round; NOT [fruit oval]

bullet

stone more or less flattened

bullet

stone with a groove on the end

 

bullet

Prunus: Answers to key questions in Budd's Flora and Flora of Alberta leading to this genus. 
bullet

shrubs or trees; NOT [herbs, or with a woody base and otherwise herbaceous]

bullet

plants taller; NOT [creeping dwarf shrubs]

bullet

plants NOT spiny

bullet

leaves simple; NOT [leaves compound or lobed]

bullet

leaves serrate or toothed; NOT [leaves entire]

bullet

flowers usually more numerous; NOT [flowers solitary on a long peduncle]

bullet

ovary or ovaries superior, hypanthium free from the ovary; NOT [ovary inferior, enclosed in and adnate to the hypanthium]

bullet

carpel 1; NOT [carpels 2 or more]

bullet

fruit fleshy; NOT [fruit a leathery follicle]

bullet

fruit a red or black drupe with a single stone; NOT [fruit a berry-like pome with several seeds]

 

bullet

Rosaceae: Answers to key questions in Budd's Flora  leading to this family. 
bullet

herbs; NOT [shrubs or trees]

bullet

plants terrestrial or semiaquatic; NOT [plants aquatic, leaves submerged or floating]

bullet

plants NOT with colored milky juice

bullet

plants with more than one normal leaf

bullet

some or all leaves alternate; NOT [leaves opposite, whorled, or basal]

bullet

leaves with stipules; NOT [leaves without stipules, or having glands]

bullet

flowers with two floral rings, and with each petal distinct from the others

bullet

flowers regular in shape; NOT [flowers irregular in shape]

bullet

calyx regular; NOT [calyx irregular, some sepals smaller than others]

bullet

stamens usually separate or partly so, not in a column; NOT [stamens numerous, united into a column]

bullet

ovary of one or more carpels, either separate or enclosed by a fleshy receptacle; NOT [ovary of 5 united carpels]