Plants shrubby to treelike, usually branching basally, 1-3 m (3.3-9.8 ft) high with well-defined but short trunks. Stems cylindrical, ascending, glabrous, green, becoming brownish with age, 3-6 mm (to 0.2 in) in diameter. Leaves acute api-cally and basally, 2.8-6 cm (1.1-2.4 in) long, 1.5-3 cm (0.61.2 in) wide. Areoles round, with felt and glochids. Glochids abundant, yellow to reddish, 2-4 mm long. Spines 1-3 on the stems, more on trunks, black to gray, with darker bases, 2-7 cm (0.8-2.8 in) long. Flowers yellow, 3.8-5 cm (1.5-2 in) long, 3.7-4.3 cm (1.5-1.7 in) in diameter; pericarpels with bracts. Fruits pear shaped, reddish green to grayish green, 3-6 cm (1.2-2.4 in) long, 0.8-2 cm (0.3-0.8 in) in diameter. Distribution: Durango, Sinaloa, and Michoacan, Mexico.
Pereskia zinniiflora, photograph by Beat Leuenberger
Pereskiopsis diguetii (F. A. C. Weber) Britton & Rose 1907 ALFILERILLO, COLA DE DIABLO, NOPALETA, PATILÓN Opuntia diguetii F. A. C. Weber 1898 Pereskiopsis velutina Rose 1907
Plants densely shrubby, branching basally, to 1-2 m (3.3-6.6 ft) high with poorly developed trunks. Stems reddish green, finely hairy, 4-8 mm (to 0.3 in) in diameter. Leaves elliptical to ovate, acuminate apically, wedge shaped basally, 2-6 cm (0.8-2.4 in) long, 1.5-3 cm (0.6-1.2 in) wide, finely hairy. Areoles whitish, with glochids, wool, some hairs, and a few spines. Glochids abundant, to 2 mm long. Spines 1-5 on stems, more on trunks, straight, ascending, nearly black, grayish with age, 2-7 cm (0.8-2.8 in) long. Flowers yellow, 3-7.5 cm (1.2-3 in) long, 3.2-4.5 cm (1.3-1.8 in) in diameter; pericarpels with bracts, pubescent. Fruits top shaped to obovoid, orange to yellow, sometimes becoming red, hairy, 2.5-7 cm (1-2.8 in) long, 1-1.6 cm (0.4-0.6 in) in diameter, with abundant glochids. Distribution: Guanajuato, Queré-taro, México, Morelos, Oaxaca, Jalisco, Michoacán, and Guerrero, Mexico.
Plants shrubby, somewhat trailing. Stems pale green to grayish, woody, 2-3 m (6.6-9.8 ft) long, to 1.5 cm (0.6 in) in diameter. Leaves obovate, pointed apically, sessile, green, not hairy, to 2.5 cm (1 in) long. Areoles round, dark, with long dark brown glochids. Spines one to several, gray to nearly black, sometimes with a paperlike covering, to 5 cm (2 in) long. Flowers bright yellow, 2-3 cm (0.8-1.2 in) in diameter. Fruits deep red, to 2 cm (0.8 in) long. Distribution: Baja California Sur, Mexico. Pereskiopsis gatesii may be merely a population of P. porteri.
Pereskiopsis kellermanii Rose 1907
Pereskiopsis scandens Britton & Rose 1923, Pereskia scandens (Britton & Rose) Standley 1930
Plants shrubby, clambering, branches arising at right angles to main ones, 4-5 m (13-16 ft) high. Stems weak, green when young, darker with age, glabrous, herbaceous, to 2 cm (0.8 in) in diameter. Leaves obovate to oblanceolate to elliptical, bright green, glabrous, much longer than wide, 2.5-5 cm (1-2 in) long, 2-2.5 cm (0.8-1 in) broad. Areoles round, with white hairs and dark glochids. Glochids abundant, reddish, to 4 mm long. Spines 1-3, sometimes absent, usually more on trunks, black, becoming gray with age, straight, stout, 1-4 cm (0.4-1.6 in) long. Flowers yellow, 4-6 cm (1.62.4 in) long, 4.5-5.5 cm (1.8-2.2 in) in diameter; pericarpels with glochids but no spines. Fruits top shaped, orange, becoming red, glabrous, 2.5-6 cm (1-2.4 in) long, 0.8-1.8 cm (0.3-0.7 in) in diameter. Distribution: Guatemala, and Chiapas, Morelos, Veracruz, and Oaxaca, Mexico.
Pereskiopsis porteri (T. Brandegee ex F. A. C. Weber) Britton & Rose 1907
ALCAHUESAR, ALCAJER, ALCAJES, RAJAMATRACA, ROSA AMARILLA, X0C0N0XTLE
Opuntia porteriT. Brandegee ex F. A. C. Weber 1898, not (A. P. de Candolle) K. Schumann 1898 (see Pereskiopsis rotundifolia) Opuntia rotundifolia T. Brandegee 1891, not (A. P. de Candolle) K.
Schumann 1898 (see Pereskiopsis rotundifolia) Opuntia brandegeei K. Schumann 1898, illegitimate name; Pereskiopsis brandegeei (K. Schumann) Britton & Rose 1907, illegitimate name
Plants shrubby to treelike, sometimes sprawling, 2-5 m (6.616 ft) high, branches ascending from well-defined woody trunks to 3 cm (1.2 in) in diameter and bearing areoles with 15-20 large spines. Stems stout, woody, green, glabrous, 10-
40 cm (3.9-16 in) long, 0.5-1 cm (0.2-0.4 in) in diameter. Leaves variable, sessile, ovate to rounded to lance shaped, glabrous, green, fleshy, 1.2—5 cm (0.5—2 in) long, 0.5-3 cm (0.2-1.2 in) wide. Areoles gray, often with hairs. Glochids usually abundant, reddish. Spines 1-3, sometimes absent on young stems, as many as 16 on trunks, straight, ascending, blackish to gray, 0.5-5 cm (0.2-2 in) long. Flowers opening widely, yellow, 4-5 cm (1.6-2 in) long, 4-8 cm (1.6-3.1 in) in diameter; pericarpels with glochids and hairs but usually no spines. Fruits jointlike or cylindrical, reddish orange to yellowish orange, prolific, 3-5.5 cm ( 1.2-2.2 in) long, 0.4-1.2 cm (to 0.5 in) in diameter. Distribution: Nayarit, Sinaloa, Sonora, and Baja California Sur, Mexico.
Pereskiopsis rotundifolia (A. P. de Candolle) Britton & Rose 1907
Pereskia rotundifolia A. P. de Candolle 1828, Opuntia rotundifolia (A. P. de Candolle) K. Schumann 1898, not! Brandegee ex F. A. C. Weber 1898 (see Pereskiopsis porteri)
Pereskiopsis rotundifolia, photograph by Gordon Rowley
Opuntia chapistle F. A. C. Weber 1904, Pereskiopsis chapistle (F. A. C. Weber) Britton & Rose 1907
Plants shrubby to treelike, much branched, somewhat woody, 2-4 m (6.6-13 ft) high, sometimes forming trunks. Stems slender, glabrous, brownish, 5-12 mm (0.2-0.5 in) in diameter. Leaves nearly round, mucronate, fleshy, 3-8 cm (1.2-3.1 in) long, 1.7-4.7 cm (0.7-1.9 in) wide. Areoles gray, without hairs. Glochids abundant or rare, reddish, 3-5 mm long. Spine usually one, sometimes absent, rarely as many as 3, straight, erect, white to grayish, 3-7 cm (1.2-2.8 in) long. Flowers borne laterally on the stems, solitary, yellowish red, 2.5-4 cm (1-1.6 in) long, 2.5-3.5 cm (1-1.4 in) in diameter; pericarpels without hairs, glochids few. Fruits obovoid, without pedicels, red, 1.5-2.5 cm (0.6-1 in) long, 1-1.4 cm (0.40.6 in) in diameter. Distribution: Morelos, México, Guerrero, Oaxaca, and Puebla, Mexico.
Pereskiopsis spathulata (Otto ex Pfeiffer) Britton & Rose 1907
Pereskia spathulata Otto ex Pfeiffer 1837 Pereskia higuerana Cárdenas 1964, Rhodocactus higueranus (Cárdenas) Backeberg 1966
Plants shrubby with a few branches, 1—2 m (3.3—6.6 ft) high. Stems covered in a fine bloom, arching. Leaves wedge shaped, thick, 2.5-5 cm (1-2 in) long. Areoles bearing brown glochids. Spines 1-2, rigid, white with dark tips, to 2.5 cm (1 in) long. Flowers red. Fruits not known. Distribution: uncertain, possibly Jalisco, Mexico. Pereskiopsis spathulata may simply be a variant of P. diguetii; its status is uncertain because so little is known about it.
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