Argemone pleiacantha ssp. pinnatisecta
|Joyce Maschinski, Ph.D.|
The following Participating Institutions are custodians for this species in the CPC National Collection:
The Arboretum at Flagstaff
The conservation of Argemone pleiacantha ssp. pinnatisecta is fully sponsored.
Joyce Maschinski, Ph.D. contributed to this Plant Profile.
The Sacramento prickle-poppy produces attractive, grapefruit-sized white flowers while spiny leaves and fruits protect the plant from many predators. This species is found along drainages and roadsides near the Sacramento Mountains in New Mexico. It is a robust, herbaceous perennial, with multiple branching stems. It grows to about 0.5-1.5 m in height and has blue-green leaves with veins that are armored with stout yellow spines. It flowers from May to August. Another subspecies, Argemone pleiacantha ssp. pleiacantha, is considered common. This subspecies has leaves that are less deeply divided, capsule spines that are more dense, and branched at the base, and a yellow-orange latex in its stem. (New Mexico Rare Plant Technical Council 1999)
Distribution & Occurrence
- New Mexico
Loose, gravelly soils in open disturbed sites; canyon bottoms and slopes, and occasionally along roadsides; found at 1,300-2,200 m (4,200-7,100 ft) in elevation. (New Mexico Rare Plant Technical Council 1999)
|In the late 1980s there were approximately 1,300 known individuals, but the number has likely declined since then. (New Mexico Rare Plant Technical Council 1999)|
Conservation, Ecology & Research
Road construction and maintenance
Trampling and grazing from livestock
Off-road vehicles (NatureServe 2001)
Activities like highway maintenance or pipeline construction are threats because they could destroy some pl
Ownbey, G.B. 1958. Monograph of the Argemone for North America and the West Indies. Memoirs of the Torrey Botanical Club. 21: 1-159.
USFWS. 1987. Proposal to determine Argemone pleiacantha ssp. pinnatisecta (Sacramento prickly poppy) to be an endangered species. Federal Register. 52, 133: 26164-26167.
USFWS. 1989. Final Rule to Determine Argemone plelacantha ssp. pinnatisecta (Sacramento prickly poppy) To Be an Endangered Species. Federal Register. 54, 163: 35302-35305.