Echinocereus rigidissimus (Engelm.) F.Haage

국표에 없다.

Echinocereus rigidissimus, commonly known as the Arizona rainbow cactus or rainbow hedgehog cactus, is a solitary-growing cactus that rarely branches or offsets with age.

Description

Echinocereus rigidissimus grows to a height of 6 to 30 cm, and a width of 4 to 11 cm when mature, with pectinate radial spines curved slightly towards the stem. There are 15 to 26 low ribs that are flatly tuberculated. The new spines are initially reddish to magenta and fades to a yellow or light pink color when they mature. Central spines are not formed. Echinocereus rigidissimus flowers in flushes throughout the spring season, with multiple buds borne atop the plant from younger areoles. The flowers are bright pink in colour with a white coloured throat. The flowers appear at the tips of the shoots, are 6 to 7 centimeters long and reach a diameter of 6 to 9 centimeters. If pollination is successful, Echinocereus rigidissimus forms circular shaped, greenish to dark purplish fruit, with white flesh and dark brown to black seeds approximately 3 months after flowering. Since it rarely offsets, Echinocereus rigidissimus is propagated by seed.

Echinocereus rigidissimus - Wikipedia

Distribution

The natural habitat of Echinocereus rigidissimus is distributed abundantly throughout Chihuahua and Sonora in Mexico, as well as in the United States in Arizona and New Mexico. It grows at elevation from 1200 to 2000 metres above sea level. This cactus prefers south facing slopes and is rarely seen on flat ground. It prefers the 1500 meter elevation. Plants are resistant to small grass fires, but cannot tolerate hotter fires. With perfect habitat, these plants have been seen growing up to 45 centimeters in height. A 2018 measurement of one plant in the Santa Catalina mountains showed a height of 48 centimeters, a record. Flowering occurs from late April to early June depending on the elevation and spring heat. These plants will not flower when stressed, but lack of flowering is rare. Their habitat has been negatively affected by cattle, cactus collectors and off road vehicles. These plants are becoming less common in southern Arizona.

Echinocereus rigidissimus - Wikipedia

The large flowered echinocereus rigidissimus has relatively limited distribution in south Arizona and south New Mexico. The short spines, all radial, are angled back close to the stem, and are variously colored light brown, white, pink or grey, often in rings of differing shades - like a rainbow, hence the plant's common name. The variation results from changing growing conditions from year to year, a trait the plant shares with the Texas rainbow cactus. The showy pink flowers are often wider than the plant itself. The species is very frost tolerant, and may be found quite high up in the southeast Arizona mountains.

Scientific name:

Echinocereus rigidissimus

Common name:

Arizona rainbow cactus, rainbow hedgehog cactus

Range:

South and southeast Arizona, southwest New Mexico

Form:

Single, unbranched

Habitat:

Rocky hillsides, arid grasslands, canyon walls, low elevation woodland

Flowers:

Pink, with white interior

Echinocereus rigidissimus, Arizona rainbow cactus (americansouthwest.net)

Echinocereus rigidissimus, Arizona rainbow cactus

The specific epithet "rigidissimus (rig-id-ISS-ih-mus)" means "very rigid, most rigid" and refers to the stiff spines.

매우 단단하고, 가장 단단한,뻣뻣한 가시를 말하는 거야.

 

 

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