Peniocereus greggii

(Engelmann) Britton & Rose

Contr. U.S. Natl. Herb. 12: 428. 1909.

Common names: Desert night-blooming cereus Arizona queen-of-the-night
Illustrated
Basionyms: Cereus greggii Engelmann in F. A. Wislizenus, Mem. Tour N. Mexico, 102. 1848
Treatment appears in FNA Volume 4. Treatment on page 156. Mentioned on page 157.

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.

Distribution

V4 301-distribution-map.gif

Ariz., N.Mex., Tex., w Mexico

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Key

1 Areoles elliptic, 4-5 × 2 mm; adaxial spines tending to be directed toward tip of plant; abaxial spines directed toward base of plant; flowers 15-17 × 5-6 cm Peniocereus greggii var. greggii
1 Areoles nearly circular, 2 × 2 mm; spines radially spreading; flowers 22-25 × 7-8 cm Peniocereus greggii var. transmontanus
... more about "Peniocereus greggii"
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
cream-yellow +
2 cm20 mm <br />0.02 m <br /> (?) +
cushionlike +
circular +  and elliptic +
1.2 cm12 mm <br />0.012 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
deciduous +  and persistent +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
woolly +, glabrate +  and lanose +
hourglass--shaped +
12 cm120 mm <br />0.12 m <br /> (?) +
2 cm20 mm <br />0.02 m <br /> (?) +
Donald J. Pinkava +
(Engelmann) Britton & Rose +
hardened +
swollen +
Cereus greggii +
triangular +
2 +  and 5 +
polygonal +
proliferating +
flattened +  and cylindric +
Desert night-blooming cereus +  and Arizona queen-of-the-night +
not mucilaginous +
Ariz. +, N.Mex. +, Tex. +  and w Mexico +
not separating +
fragrant +
15 cm150 mm <br />0.15 m <br /> (25 cm250 mm <br />0.25 m <br />) +
15 cm150 mm <br />0.15 m <br /> (30 cm300 mm <br />0.3 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (15 cm150 mm <br />0.15 m <br />) +
3 cm30 mm <br />0.03 m <br /> (4 cm40 mm <br />0.04 m <br />) +
darkening;bright red +
indehiscent +
persistent +, long +  and deciduous +
60mm;90mm +
tuberculate +
ellipsoid +
4 cm40 mm <br />0.04 m <br /> (5 cm50 mm <br />0.05 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
attenuate +  and mucronate +
4 cm40 mm <br />0.04 m <br /> (7 cm70 mm <br />0.07 m <br />) +
deciduous +  and persistent +
rudimentary +
flat +  and terete +
nearly +  and microscopic +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
tuberculate +
fluted;spheric;depressed-spheric or club-shaped +
ciliate +  and entire +
entire +  and slightly undulate +
brown +  and reddish +
2.5 cm25 mm <br />0.025 m <br /> (5 cm50 mm <br />0.05 m <br />) +
scaleless +  and scaly +
deciduous +  and persistent +
not mucilaginous +
ridgelike +  and nipple--shaped +
Contr. U.S. Natl. Herb. +
prominent +
15 cm150 mm <br />0.15 m <br /> (?) +  and 30 cm300 mm <br />0.3 m <br /> (?) +
turnip--shaped +
5cm +  and 12cm +
brown +, tipped red +  and green +
triangular +
arillate +  and strophiolate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
dull +  and shiny +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Illustrated +
0.4 cm4 mm <br />0.004 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
yellowish white +
deciduous +  and persistent +
11 (?) +  and 15 (?) +
acicular +, subulate +  and conic +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
hard +  and rigid +
decurrent +
with 2-5 branches +  and simple +
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
gray-green +  and gray +
0.8 cm8 mm <br />0.008 m <br /> (2 cm20 mm <br />0.02 m <br />) +
25cm;300cm +
narrowed +
slender +
40 cm400 mm <br />0.4 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
0.3cm;2cm +
10 cm100 mm <br />0.1 m <br /> (14 cm140 mm <br />0.14 m <br />) +
tuberculate +
Cullmannia +, Neoevansia +  and Nyctocereus +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Peniocereus greggii +
Peniocereus +
species +
lanceolate;oblanceolate apiculate +
dull +  and glossy +
pitted +  and rugose +
flaring +
epiphytic;epiphytic;epiphytic +
erect +  and sprawling +
barrel-shaped +  and spheric +
solid-surfaced +  and hollow +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
cylinders +