Opuntia pottsii Salm-Dyck

국표에 없다.

Origin and Habitat: Widespread In Midwest and south-western United States (Colorado, Utah, Wyoming, South Dakota, Nebraska, and Missouri) and northern Mexico (Chihuahua and probably also in the state of Sonora as there is suitable habitat). The population is very scattered but it is locally common.
Altitude range: This species grows at an elevation of 800 to 2200 metres above sea level.
Habitat: Grows on loam or rocky, sandy places, alluvial hillsides and plains, in desert scrubs and grasslands (mesquite and yucca grassland). Opuntia pottsiiSN|19900]]SN|19900]] has a wide range, and although a cryptic species it is probably reasonably common and resistant to most threats as it has underground tubers. There are no significant threats to this species although some areas would have been impacted by agricultural activities and there may be some localized declines.

Synonyms:

• Opuntia macrorhiza subs. pottsii (Salm-Dyck) U.Guzmán & Mandujano

See all synonyms of Opuntia macrorhiza

 

Common Names include:
ENGLISH: Potts prickly pear, Potts pricklypear cactus

 

Description: Opuntia pottsiiSN|19900]]SN|19900]] (Opuntia macrorhizaSN|19900]]SN|19886]] subs. pottsii) is a diminutive shrubby plant up to 12(-30) cm tall, forming low prostrate clumps up to 2 metres in diameter. It is a cryptic species and grows from a tuberous root. The pads are glaucous blue-green when healthy. The usually 1-3 grey-white spines per areole are produced only on the upper part of the pads. Throughout it range the flowers may be red, magenta, pink, orange, yellow, white, and combination of these colours are found, sometime toghether in the same populations. When yellow, the flowers often have red centres. Two varieties of Opuntia pottsiiSN|19886]]SN|19900]]are recognized by David J. Ferguson (2012), the nominate form var. pottsii and var. montana. Varieties intergrade where they meet.
Derivation of specific name: The species was named after John Potts, who managed the mint in Chihuahua, Mexico, collected the original material of the species, and between the years 1842 and 185o sent many cactus collections to E Scheer at the Royal Botanic Gardens, Kew, England (Britton and Rose, 1919-13).
Stem: Segments usually not rooting when touching, round to obovate, often narrowed near base (stipitate), upright, glaucous blue-green (Yellow-green or purplish when stressed), 5-10(-13) cm long, 5-8(-10) cm wide, to 1.2 cm thick, wrinkled under very dry or cold conditions. Commonly plants produces only 6-10 pads and often a short trunklet.
Roots: Rhizomes commonly present. Central root tuber usually long and roughly cylindrical.
Areoles: 10-16 mm apart, narrowly obovate to nearly circular, 2-3 mm across.
Glochids: Yellow or brown, to 3(-5) mm long, numerous in a tight tuft.
Spines: One to five spines from the upper areoles, 1.5 to 6.5 cm long, whitish, grey or brownish, and black speckled, acicular or somewhat flattened, often rwisted, and downwards pointing. In each areole one spines is longer, while the other are short or different length. Rarely plants of Opuntia pottsiiSN|19900]]SN|19900]] are spineless.
Leaves: Ephemeral, usually green or reddish only 3-5 mm long.
Roots: It has a single or branched fleshy, enlarged taproot that exude a milky sap when injured. It may be smooth or costricted at the neck.
Flower: Usually orange, pink, yellow with red bases to reddish, appear on early June , 5-6(-9) cm long and 4-5(-6) cm in diameter with petals curving upward and rolled back at sides.. In some flowers the slender pericarpel alone often 5 cm long. Filaments 12-15 mm long, yellow, greenish or purplish. Anthers yellow up to 2 mm long. Style pinkish 17-23 mm long. Stigma lobes 5-8 cream coloured, stout 3-4 mm long. Pericarpel smooth with few small areoles with white hairs and yellow-brown glochids. Flowers open about mid-day and close by 4:30 P.M., and do not open again.
Blooming season (in habitat): late April to early June. Most plants tend to produce flowers at much the same time, and the flowers may be finished in about one week.
Fruit: Obovoid narrow with slender base, and smooth, greenish to pinkish or reddish purple at maturity, fleshy, juicy, 2.5-4 cm long, 2.5-3cm in diameter flattened and irregular. The pulp is pale greenish and not very sweet. Fruits mature in 2.5-5 (or even more) months.
Seeds: Thick discoid, irregular in outline, wide margined, and beaked at the hilum, tan to grey, 3.5-5.5 mm in diameter.

 

Opuntia pottsii (llifle.com)

 

https://youtu.be/nl5G0mMkwxc?t=2415