Kingdom: Plantae
Phylum: Anthophyta
Class: Dicotyledoneae
Order: Caryophyllales
Family: Cactaceae
Genus: Pediocactus
Species: knowltonii
Knowlton Cactus - Pediocactus knowltonii
597036
Species Extent (New Mexico)
General Description
Stems 1.0-2.5 cm in diameter, solitary or a few in a cluster, barely protruding above ground level; tubercles not grooved; spines about 20 per areole, all radials, radiating from areole and appressed to the plant, 1-2 mm long, usually whitish, pinkish, or brownish and darkest at tip; flowers 1.5-2.5 cm across, fragrant, borne from previous years areoles near apex of plant, tepals white to magenta, usually pink, stigmata yellowish or pale green, ovary with few tiny papery scales; fruit barrel-shaped, fleshy, not juicy, dehiscing by circumscissile split at top and one or more vertical splits; seeds dark gray, 1.5-2.0 mm long, teardrop-shaped with low nearly flat tubercles, hilum sublateral and with a whitish strophiole. Flowers April and May.
Status
USFS Status:
BLM Status:
SWAP Status:
NMRP Strategy Status: Strategy Species
Observations in Natural Heritage New Mexico Database
Number of Subpopulations: 2
Number of Mapped Locations: 81
Number of Observations: 183
Observation date range: 04-10-1961
to 05-11-2021
External Links
Year
2009
Citation Glenne, G. and E. Mayo. 2009. Field survey form for Knowlton cactus (Pediocactus knowltonii). 4 p.
Reference Code
F09GLE01NMUS
Year
1986
Citation Knight, P. Marron and Associates Inc., 7511 Fourth Street, Albuquerque, NM 87107-6629 (505) 898-8848
Reference Code
PNDKNI01NMUS
Year
2005
Citation Sivinski, R. 2005. Endangered Plant Study. Sante Fe, NM: New Mexico Forestry Division; Performance and Progress Report E-9-19. 106p.
Reference Code
R05SIV01NMUS
Year
1994
Citation Sivinski, R. 1994. Section 6, Segment 8, Annual report of botanical work accomplished by New Mexico Forestry and Natural Resources Dept. for US Fish and Wildlife Service, Albuquerque, NM.
Reference Code
R94SIV01NMUS
Year
61
Citation S61PIESBNMUS, Legacy reference. Physical copy not yet located.
Reference Code
S61PIESBNMUS
Year
61
Citation S61REESBNMUS, Legacy reference. Physical copy not yet located.
Reference Code
S61REESBNMUS
Year
67
Citation S67PIESBNMUS, Legacy reference. Physical copy not yet located.
Reference Code
S67PIESBNMUS
Year
71
Citation S71HEISBNMUS, Legacy reference. Physical copy not yet located.
Reference Code
S71HEISBNMUS
Year
2004
Citation Sivinski, R. 2004. Knowlton's Cactus (Pediocactus knowltonii): Progress Report. New Mexico Forestry Division; Santa Fe, New Mexico. 13 p.
Reference Code
U04SIV01NMUS
Year
2013
Citation Roth, D. 2013. Pediocactus knowltonii (Knowlton's Cactus), summary report. Submitted U.S. Fish and Wildlife Service, Section 6, Segment 27. 25.
Reference Code
U13ROT02NMUS
Year
2015
Citation Roth, D. 2015. Pediocactus knowltonii (Knowlton's Cactus) summary report, 2014. NM Energy, Minerals, and Natural Resources Department.
Reference Code
U15ROT03NMUS
Year
2016
Citation Roth, D. 2016. Pediocactus knowltonii (Knowlton's Cactus): 2015 summary report, Section 6, segment 29. New Mexico Energy, Minerals, and Natural Resources Department, Forestry Division, Santa Fe, NM. 32 p.
Reference Code
U16ROT02NMUS
Year
2016
Citation Roth, D. 2016. Pediocactus knowltonii (Knowlton’s Cactus) 30-year Summary Report (Section 6, Segment 30). Unpublished report prepared by EMNRD-Forestry Division, Santa Fe, NM for the U.S. Fish & Wildlife Service, Region 2, Albuquerque, NM.
Reference Code
U16ROT07NMUS
Year
1994
Citation Sivinski, R. 1994. Knowltons's cactus (Pediocactus knowltonii), 1994 progress report (Section 6, Segment 9).
Reference Code
U94SIV04NMUS
Year
1978
Citation New Mexico Natural Heritage Program. Unpublished computer database (LCD) plant and animal records from NM Natural Heritage Program 1978 - 86.
Reference Code
UNDHER01NMUS
