Peniocereus greggii (Engelm.) Britt. & Rose  
Family: Cactaceae
nightblooming cereus,  more...
[Peniocereus greggii subsp. greggii ]
Peniocereus greggii image
Anthony Mendoza  
Shrubs, erect to sprawling, usually inconspicuous. Roots turnip-shaped, usually 15-30 × 5-12 cm (much larger ones known). Stems gray-green to gray, simple or with 2-5 branches, 40-120(-300) cm, distally 8-20 mm diam., at midlength ca. 10 mm diam., often narrowed toward base; wood hollow, solid-surfaced cylinders, 4-7 mm diam.; ribs 4-6, prominent; areoles (3.5-)12(-15) mm apart along ribs, circular to elliptic, 2-5 × 2 mm. Spines (9-)11-15(-17) per areole, usually in 3 vertical rows; abaxial 3-5 spines appressed, yellowish white throughout or only at tips, to 3 mm, puberulent when young; adaxial spines black, subulate, to 1 mm. Flowers: nocturnal (remaining open next day), 15-25 cm; scales of flower tubes green, tipped red or brown; outer tepals greenish white with brown to reddish midstripes; inner tepals white or lightly tinged cream or pink (or rarely all rose-pink), lanceolate-attenuate, apiculate, 4-7 cm, attenuate to mucronate; stamens 2.5 cm; anthers cream-yellow, 2 mm; style white, 10-14 cm; stigma lobes 9-11, white. Fruits bright red, darkening in age, ellipsoid, 60-90 × 40-50 mm. Seeds 3-4 × 2-2.5 mm. 2n = 22.
Plant: Shrubs erect to sprawling, sparingly branched, inconspicuous, 0.4-1.2(-3) m tall; root solitary, large, light-brown, napiform, usually 15-30 cm long, 5--12 cm wide, but much larger ones are known . STEM gray-green to gray to purple, the distal parts 8-25 mm in diameter, bearing 4-6 prominent, angular, papillose-canescent ribs, the basal parts usually narrowed, brown and cylindric. AREOLES white-woolly, aging gray to blackish, (3.5-)4.5-12(-15) mm apart on each rib Leaves: SPINES black to yellowish-white, (9-)11-15(-17) per areole, usually in 3 vertical rows; apical ones black, subulate to 1 mm long; basal 3-5 spines yellowish white throughout to only at tips, thinner, to 3 mm long, appressed, puberulent when young Flowers: 15-25 cm long, 5-12 cm wide; floral tube papillose-canescent, the scales green tipped red or brown; tepals 4-7 cm long, lanceolate, attenuate to mucronate, the outer ones greenish white with brown to reddish midstripes, the inner ones white or lightly tinged cream or pink or rarely all pale rose pink; stamen filaments white, the anthers very pale cream-yellow Fruit: FRUITS bright red darkening in age, spiny, ellipsoid, snouted, 3-10.5 cm long, 2-5 cm in diameter; pulp red, fleshy, edible. SEEDS black, tessellate, wrinkled at hilum region, ca. 3-4 mm long, 2-2.5 mm wide REFERENCES: Pinkava, Donald J. 1995. Cactaceae. J. Ariz. - Nev. Acad. Sci. 29(1): 2, 6
Peniocereus greggii image
Liz Makings  
Peniocereus greggii image
Anthony Mendoza  
Peniocereus greggii image
L.R. Landrum  
Peniocereus greggii image
Anthony Mendoza  
Peniocereus greggii image
Mark Taylor  
Peniocereus greggii image
Shannon Henke  
Peniocereus greggii image
Anthony Mendoza  
Peniocereus greggii image
Anthony Mendoza  
Peniocereus greggii image
L.R. Landrum