Plant Image
Flowers
Granite Mtn - Tr 308 - Sue Smith


Yavapai County Native & Naturalized Plants

Platystemon californicus - cream cup

Synonyms: Platystemon arizonicus, , Platystemon californicus var. californicus, Platystemon californicus var. ciliatus, See USDA plant database.
Other Common Names: creamcups, cream cups
Plant Form: Forb or Subshrub

Family: Papaveraceae


   
 
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Leaves
Granite Mtn - Tr 308
Sue Smith
Plant - summer
Granite Mtn - Tr 308
Sue Smith
Plant - summer
Granite Mtn - Tr 308
Sue Smith
Flower buds
Granite Mtn - Tr 308
Sue Smith
Forb Plant Description

Origin: Native   Life Cycle: Annual
General Desc: A soft-haired plant with several stems and mostly basal leaves, each stem topped with 1 small, bowl-shaped flower resembling a pale yellow or cream buttercup.
Identification notes: Hairy annual with basal, opposite entire leaves and perfect white flowers solitary at stem ends. Flowers cream-colored or white, often fading to yellow, stamens many. Fruit is a capsule, often constricted between each dark squarish seed.
Height: 6 to 12 inches


Habitat

Habitat Description: Found in open areas, often in loose or disturbed soils.
Plant Communities: Interior Chaparral, Semidesert Grasslands, Disturbed Areas
Elevation: 1500 - 4500 feet


Flower Characteristics

Color: Pale creamy yellow to white     Shape: Regular not in clusters     Tubular: N     Flowering Period: Mar - May
Description: Flowers solitary, terminal, normally 6 petals, sometimes more, to 1 inch wide. The delicate, cream-colored, solitary flowers of this 6 to 12 inches annual are followed by a fruit which has been compared to tiny ears of corn.


Leaf and Stem Characteristics

Leaf Color: Grayish-green     Leaf Type: Simple     Leaf Shape: Narrow     Leaf Margin: Smooth     Leaf Attachment: Basal and opposite     Leaves Clasp: Y
Hairs: Leaves and stems     Spines: N
Leaf Description: Leaves are mostly basal, 1/2 to 3-1/2 inches long and hairy with prickles on veins and margins; stem leaves clasp the stem.


Fruit and Seed Characteristics

Fruit Color: Green to brown   
Fruit Type: Capsule
Fruit Notes: Cylindrical capsule 2/3 inch long, turns brown. Sometimes compared to tiny ears of corn with the husks removed. The ovary separates into many sections when fruit forms.
Seed Notes: Black squarish seeds.



  Arizona Cooperative Extension
Yavapai County
840 Rodeo Dr #C
Prescott, AZ 86305
(928) 445-6590
Version 8.0  
http://cales.arizona.edu/yavapaiplants/SpeciesDetailForb.php  
Last Updated: Dec 13, 2022
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