Epithelantha greggii (Engelm.) Orcutt

Epithelantha greggii (Engelm.) Orcutt

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Epithelantha greggii (Engelm.) Orcutt

Epithelantha cryptica D.Donati & Zanov.	Origin and Habitat: Coahuila de Zaragoza, Mexico (North America) Type locality: Mpio. Castanos, La Muralla, 1100 m, Coahuila (Mexico Northeast, Mexico, Northern America) Habitat: It grows in hills with low slopes, on gravel mixed with soil containing organic compounds and crevices on hills and ridges; These cacti are normally found in small clusters because the seeds fall nearby.  Also wind, rain, and wildlife help with the dispersal of seeds. Associated species: Epithelantha greggii subsp. greggii, Echinocereus pectinatus, Echinocereus enneacanthus, C oryphantha macromeris, Sclerocactus scheeri, Echinomastus mariposensis etc. http://www.llifle.com/Encyclopedia/ CACTI/Family/Cactaceae/1 8600/Epithelantha_cryptica
Epithelantha bokei L.D.Benson Epithelantha micromeris subs. bokei (L.D.Benson) U.Guzmán Epithelantha micromeris var. bokei (L.D.Benson) Glass & R.A.Foster	Origin and Habitat: Chihuahuan Desert of South Texas, in Brewster/ Sanderson County and northern Mexico in Coahuila and Chihuahua. Altitude: 700-1500 metres above sea level. Habitat: Epithelantha bokei is an edaphic specialist growing in dense groups on very specific calcareous strata on raised limestone hills, mountain top and ledges in xerophyllous scrub. It also grows on plains, on gravel mixed with earth containing a big amount of organic compounds from decayed leaves. It is locally abundant and it grows in many inaccessible areas, however some subpopulations are threatened by illegal collection. Associated species: Coryphantha difficilis, Ariocarpus fissuratus subsp. lloydii, Echinocereus pectinatus, S clerocactus scheeri, Mammillaria heyderi, etc. ENGLISH: Smooth Button Cactus, Boke's Button Cactus Description: Epithelantha bokeiis a slow-growing mini cactus (usually solitary), with only 2-3 cm of stem height, covered so densely with closely appressed tiny white spines that the plants appear to be completely white and smooth to the touch. Flower: Flowers are pale pink or yellowish, very delicate, appearing in July. http://www.llifle.com/ Encyclopedia/CACTI/Family/ Cactaceae/12641/ Epithelantha_bokei
Epithelantha micromeris var. rufispina (Bravo) Backeb. Epithelantha greggii var. rufispina (Bravo) Backeb. Epithelantha rufispina Bravo	Description: Epithelantha micromeris var. rufispina is a minute globular button cactus, becoming somewhat elongated when old. A dainty plant, and an easy one to handle. The short spines of this little cactus are appressed to its body and so do not puncture your hands. Stem: Solitary, up to 10 cm tall, but at times has offsets at the base. T he appressed apex contains many reddish spines. The stem becomes quite dehydrated during drought, b ut fills out quickly. Spines: 30-40 all radials, greyish- white in young specimens, turning to a grey-reddish or brownish tinge in adult plants crown, while the rest of the spines on the body of the plant are greyish. Flowers: Small cream-pink coloured, emerging from the wool at the apex. Blooming season Flowers start open from April in succession over a longer time later in summer. http://www.llifle.com/ Encyclopedia/CACTI/Family/ Cactaceae/12632/Epithelantha _micromeris_var._rufispina
Epithelantha greggii (Engelm.) Orcutt Cactus micromeris var. greggii (Engelm.) J.M.Coult. Cephalomamillaria greggii var. greggii (Engelm.) Frič Cephalomamillaria micromeris var. greggii cv. Gray Herb. CardCat., Issue 114 (Engelm.) Frič Epithelantha greggii (Engelm.) Orcutt Epithelantha micromeris var. greggii (Engelm.) Y.Itô Mammillaria greggii (Engelm.) Saff. Mammillaria micromeris var. greggii Engelm.	ENGLISH: Button Cactus Description: Epithelantha micromeris subs. greggii is the largest and most common of the Epithelantha micromeris subspecies that appears ashy grey and relatively rough, somewhat bristly in general aspect. Stem: Branching, mostly spheric or obovoidal, often flat-topped with a depressed centre, 5-7,5 cm in diameter; surface completely obscured by spines. Tubercles: Numerous, not confluent into ribs, hemispheric or short cylindric, very small, ca. 1-2 mm; arranged in tight spirals around the plant. Areoles: Small at tips of tubercles, 1 mm long, nearly circular, elliptic when distended by flower or fruit, slightly woolly when young, copiously woolly only at sexually mature stem apex; areolar glands absent. Spines: 20 or more chalky white, ashy grey to reddish brown, 3-5 mm long, spreading and radiating at an early age rather than pectinate and appressed on sides of stems, straight, terete, slender, innocuous. The upper ones much longer. Roots: Diffuse (usually). Flower: Inconspicuous, funnel-shaped, diurnal, deeper pink than the type, borne at adaxial margins of spine clusters in the plant top. only partly opened just distal portion visible, as they barely stick out above the wool obscured by longer spines at stem apex. Blooming season: Flowers in May-June. http://www.llifle.com/ Encyclopedia/CACTI/Family/ Cactaceae/6929/ Epithelantha_greggii
Epithelantha densispina Bravo Epithelantha micromeris var. densispina (Bravo) Backeb.	Origin and Habitat: USA - Arizona (Santa Cruz and Cochise County) New Mexico (Hildago and Sandoval Co, From Sierra and Chaves to Eddy Co), western Texas. Mexico (northern Chihuahua). The endemic Mexican taxa have relatively large flowers like those of   Epithelantha bokei. ENGLISH: Button Cactus, Living Rocks Description: Epithelantha micromeris is a miniature globose cactus, erect, unbranched or in small clumps, not deep-seated in substrate, appearing ashy grey and relatively rough in general aspect. Stem: Unsegmented, mostly spheric or obovoidal, rarely cylindric, often flat-topped with a depressed centre, 1-5(-9)cm tall and up to 2-4 (-7,5) cm in diameter, occasionally more; surface completely obscured by spines; cortex and pith are not mucilaginous. Tubercles: Numerous, not confluent into ribs, hemispheric or short cylindric, very low, ca. 1(-3) mm long arranged in tight spirals around the plant. Areoles: Small at tips of tubercles, 1 mm long, nearly circular, elliptic w hen distended by flower or fruit, slightly woolly when young, copiously woolly only at sexually mature stem apex; areolar glands absent; Spines: 20-35(-40) white to ashy grey 2-5 mm long, appressed on sides of stems, straight, terete, slender, innocuous, in 1-3 superimposed series except for a longer (4-12 mm) and erect adaxial tuft on the top, on sexually mature stem apex often greyish or purplish white, frequently with brown bases, collectively forming brown spots at the centre of each spine cluster. The upper radials on the young tubercles longer and connivent over the apex, narrowly clavate, the upper half finally falling off. Spine clusters at the sides of stem 4-5(-7) mm in diameter. Smooth or microscopically roughened by break-up of epidermis, not distinguishable as radial and central spines. In fully adult plants, the distal portions of the longest spines are worn, leaving the apex of the plant covered with short, innocuous spines.  http://www.llifle.com/ Encyclopedia/CACTI/Family/ Cactaceae/12629/ Epithelantha_densispina