Epithelantha micromeris subs. pachyrhiza

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Epithelantha micromeris subs. pachyrhiza (W.T.Marshall) N.P.Taylor
Cactaceae Consensus Init. 5: 13. 1998
Family: CACTACEAE

Epithelantha micromeris subs. pachyrhiza Photo by: Valentino Vallicelli
SB325 Higueras, Coahuila, Mexico. Flowers are pink and inconspicuous, just distal portion visible, as they barely stick out above the wool.

Origin and Habitat: Strictly endemic species found on a very small area on the Southeast and Northeast of Saltillo, Coahuila, Northern Mexico.

Synonyms:

Epithelantha micromeris subs. pachyrhiza (W.T.Marshall) N.P.Taylor

Epithelantha micromeris var. pachyrhiza W.T.Marshall
Epithelantha pachyrhiza (W.T.Marshall) Backeb.

See all synonyms of Epithelantha micromeris

Description: Epithelantha pachyrhizaSN|6936]]SN|12636]] is a slow growing rare miniature species, erect to prostrate usually unbranched Epithelantha micromerisSN'>12636]SN|6936]].
Roots: The roots are distinctly tuberous to carrot-like.
Flowers: Pinkish-white .

Subspecies, varieties, forms and cultivars of plants belonging to the Epithelantha micromeris group

Epithelantha micromeris (Engelm.) F.A.C.Weber in Bois: Miniature globose cactus, unbranched or in small clumps. Produces small pink flowers followed by attractive red fruits . Spines are white or greysh, innocuous and appressed on sides of stems.
Epithelantha micromeris f. cristata hort.: This is a miniature cactus that makes a nice and tangled cluster of fine crests. The stem surface is completely obscured by small pectinated ashy-grey to white spines.
Epithelantha micromeris var. dickisoniae hort.: Minute clustering cactus of doubtful status (but common in cultivation), it shows similarities with Epithelantha micromeris subsp. polycephala and Epithelantha pachyrhiza. Spines are whitish turning to a brownish tinge in adult plant's crown. Roots: Tuberose.
Epithelantha micromeris f. elongata (Backeb.) Bravo: It has elongated stems and a thick tap-root. It is intermediate between E. micromeris and E. pachyrhiza. Distribution: Ramos Arispe, Coahuila, Mexico.
Epithelantha micromeris subs. greggii (Engelm.) N.P.Taylor: This subspecies has a rough, somewhat bristly appearance with iIndividual stems up to 5 cm or more in diameter,. Spines are chalky white to reddish brown. Distribution: Northern Mexico, especially Saltillo, Coahuila.
Epithelantha micromeris subs. greggii f. cristata: crested form.
Epithelantha micromeris var. neomexicana n.n.: This is the population found in New Mexico (USA) but this taxon is not easily recognizable from other Epitelantha micromeris (if not the same identical plant)
Epithelantha micromeris subs. pachyrhiza (W.T.Marshall) N.P.Taylor: It has tuberousroots and a stem only partly obscured by the white to orange-tan spines; Distribution: Strictly endemic of southeast and northeast of Saltillo.
Epithelantha micromeris subs. pachyrhiza f. cristata
Epithelantha micromeris subs. polycephala (Backeb.) Glass: Clustering miniature cactus; an old plant may have more than 100 heads, and be 10 cm of diameter. Spines are grey/whitish, pastel or ocre. Distribution: it occurs in a limited area of Coahuila.
Epithelantha micromeris var. rufispina (Bravo) Backeb.: Minute globular cactus, becoming somewhat elongated when old. the spines are numerose up to 40 whitish all radials, turning to a grey-reddish or brownish tinge in adult plants crown. The spine base is reddish.
Epithelantha micromeris var. texensis n.n.: This is the population found in Texas (USA) but this taxon is not easily recognizable from other Epitelantha micromeris (if not the same identical plant)
Epithelantha micromeris var. texensis f. cristata hort.: Crested form.
Epithelantha micromeris subs. unguispina (Boed.) N.P.Taylor: It is a little larger than the standard form. Stem globular, up to 6 cm, often clumping over time. It generally has a small projecting black-tipped central spine, 4-5mm long. Origin: Near Monterrey, Nuevo Leon, south into San Luis Potosi.