Flora of North America species comparison

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Cirsium ochrocentrum var. martinii
Photo is of parent taxon

Martin's thistle, yellowspine thistle
Stems

leafy, nodes usually well separated.
Leaves

distal cauline bases clasping, or if decurrent, spiny wings usually less than 1 cm.
Corollas

red, pink, or reddish purple (rarely white).
2n

= 30, 31, 32, 34.

Cirsium ochrocentrum var. martinii
Phenology Flowering spring–autumn (May–Sep).
Habitat Desert grasslands, arid shrublands, pine-, oak-, juniper-, or mesquite-dominated woodlands, often in disturbed areas, grassy slopes in montane pine forests
Elevation 1300–2200 m (4300–7200 ft)
Distribution
from FNA
AZ; NM; Mexico (Chihuahua, Coahuila, Sonora, Durango)
[BONAP county map]
Discussion

Variety martinii occurs from east-central and southeastern Arizona to western New Mexico and is scattered southward into north-central Mexico.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 123.
Parent taxa Asteraceae > tribe Cardueae > Cirsium > Cirsium ochrocentrum
Sibling taxa
C. ochrocentrum var. ochrocentrum
Synonyms C. ochrocentrum subsp. martinii
Name authority (Barlow-Irick) D. J. Keil: Sida 21: 215. (2004)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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