Escobaria organensis (Zimmerman) Castetter, P.Pierce & K.H.Schwer.

국표에 없다.

Origin and Habitat: endemic to New Mexico, Doña Ana County, in northern Franklin and the southern part of the Organ Mountains.
Altitude: 1350-2600 metres above sea level.
Habitat: Escobaria organensisSN|10363]]SN|10363]] grows in small clusters in rugged and inaccessible areas and often forms large patches in crevices on the rocky limestone walls of canyons or scattered along ridgelines. It is easily observed throughout the year, because they are not hidden by heavy grass cover. Associated mostly with Chihuahuan desert scrub and open oak and piñon-juniper woodland.

Common Names include:
ENGLISH: Organ Mountain Foxtail Cactus

Description: Escobaria organensisSN|25139]]SN|10363]] is a small clustering cactus species, with spines obscuring the stem and giving the plant a yellow appearance. Blooms are pink.

Habit: It grow solitary or more commonly in loosely packed clumps, usually with about 10 heads per cluster, but sometime with as many as 50 heads in a single clump.
Stems: Individual stems globular to cylindric,soft, 2-4(-7) cm in diameter, to 12(-15) cm tall.
Tubercles: 7-10 mm long with upper surface bearing a groove in adult specimens.
Spines: About 20-60 per areole, majority slender and bristle-like to about 10 mm long and spreading.
Central spines: Stout, straight, tan to golden yellow, tips often reddish brown, about 10-20(-25) mm long, inner central spines 0 to 4 (usually 1) per areole, outer central spines 8 to 14 per areole, subequal.
Radial spines: 37 to 49 per areole, white, fine, stiff, straight, spines are usually not completely obscuring underlying tubercles.
Flowers: Pink (usually), pale yellowish or nearly white, often with midribs darker, not opening widely, about up to 2,5 cm long (usually smaller 1,4-1,5 mm), outer perianth parts fringed. Stigmas white to pink.
Fruits: Cylindric, yellowish green to somewhat reddish, up to 6-14(-20) mm long, perianth parts persistent.
Phenology: Flowering occurs in spring (May to June in habitat). Fruit are persistent into autumn.
Seeds: About 1 mm long, kidney-shaped with hilum lateral, pitted, brown.
Similar Species: It is similar and closely related to Escobaria sneediiSN|10363]]SN|10397]] but it has darker central spines and a large average stem diameter, these two species intergrades in the northern Franklin Mountains. It is also related with Escobaria tuberculosaSN|10397]]SN|10187]] that usually has more richly coloured flowers that open widely, fruits that ripen bright red, and seeds that are smaller and rounder. The yellowish cast to the spines distinguishes Escobaria organensisSN|10363]]SN|10363]] from other members of the Escobaria sneediiSN|10187]]SN|10397]] Complex. Escobaria organensisSN|10397]]SN|10363]] is also difficult to distinguish from Escobaria sandbergiiSN|10363]]SN|25139]] that occurs in the San Andres Mountains to the north.

Escobaria organensis (llifle.com)

 

 

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