Bergerocactus

Britton & Rose

Contr. U.S. Natl. Herb. 12: 435. 1909.

Common names: Snakecactus
Etymology: for Alwin Berger, 1871–1931, German cactologist and horticulturist at La Mortola, Italy, and Cactus, an old genus name
Treatment appears in FNA Volume 4. Treatment on page 181. Mentioned on page 96.

Shrubs, ascending to erect, spreading, or reclining, usually much branched near base, forming thickets. Roots diffuse. Stems somewhat segmented, green, long cylindric, 30–150 × 3–5 (–6) cm, glabrous; ribs (12–) 14–18, rounded; tubercles low, indistinct; areoles to 10 mm apart on rib crests, circular, felty; areolar glands absent; cortex and pith mucilaginous. Spines 30–45 per areole, straw colored, aging brown, acicular, terete; radial spines 613 mm; central spines 1–3 per areole, to 60 mm, longest spines bend downward. Flowers diurnal, lateral to terminal on stems, from adaxial edge of areole, never on first-year shoots, funnelform, 3.5–5 cm; flower tube 15–20 mm; tepals 12–20 mm; outer tepals yellow with green or reddish midstripes and tips, oblanceolate; inner tepals yellow, oblanceolate to oblong; ovary subglobose, spines usually absent; scales deltate to ovate or awl-shaped, 1–4 mm, margins entire, with tannish hairs in axils, spiny or spineless; stigma lobes 911, pale-yellow, 4–5 mm. Fruits dehiscent by extruding ribbon of pulp with seeds through apical pore, green with reddish tubercles, spheric, 25–30 mm, juicy, becoming dry after dehiscence, densely spiny like stems; pulp red; floral remnant persistent. Seeds black, obovoid, 2–3 mm, glossy; testa cells ± flat to slightly concave. x = 11.

Distribution

sw United States, nw Mexico

Discussion

Species 1.

... more about "Bergerocactus"
cushionlike +
deciduous +  and persistent +
hourglass--shaped +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Arthur C. Gibson +
Britton & Rose +
hardened +
triangular +
0 cm0 mm <br />0 m <br /> (6 cm60 mm <br />0.06 m <br />) +
proliferating +
flattened +  and cylindric +
Snakecactus +
mucilaginous +
sw United States +  and nw Mexico +
not separating +
for Alwin Berger, 1871–1931, German cactologist and horticulturist at La Mortola, Italy, and Cactus, an old genus name +
lateral +  and terminal +
3.5 cm35 mm <br />0.035 m <br /> (5 cm50 mm <br />0.05 m <br />) +
15 cm150 mm <br />0.15 m <br /> (30 cm300 mm <br />0.3 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
dry +  and dehiscent +
persistent +, long +  and deciduous +
spheric +
2.5 cm25 mm <br />0.025 m <br /> (3 cm30 mm <br />0.03 m <br />) +
oblanceolate +  and oblong +
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 +
downward +  and bend +
spineless +  and spiny +
reddish +  and green +
subglobose +
deciduous +  and persistent +
mucilaginous +
ridgelike +  and nipple--shaped +
Contr. U.S. Natl. Herb. +
moran1965a +  and moran1966a +
rounded +
deltate +  and ovate or awl-shaped +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
arillate +  and strophiolate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
obovoid +
brown +  and straw colored +
deciduous +  and persistent +
6 (?) +, 30 (?) +  and 45 (?) +
terete +  and acicular +
13 cm130 mm <br />0.13 m <br /> (?) +
hard +  and rigid +
decurrent +
unsegmented +
5 cm50 mm <br />0.05 m <br /> (6 cm60 mm <br />0.06 m <br />) +
30cm;150cm +
cylindric +  and segmented +
succulent +
3cm;5cm +
tuberculate +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Bergerocactus +
Cactaceae subfam. Cactoideae +
1.2 cm12 mm <br />0.012 m <br /> (2 cm20 mm <br />0.02 m <br />) +
less flat +  and slightly concave +
dull +  and glossy +
epiphytic;epiphytic;epiphytic +
ascending +  and erect spreading or reclining +
barrel-shaped +  and spheric +