Orobanche corymbosa subsp. mutabilis

Heckard

Canad. J. Bot. 56: 187. 1978.

Endemic
Synonyms: Aphyllon corymbosum subsp. mutabile (Heckard) A. C. Schneider
Treatment appears in FNA Volume 17. Treatment on page 477.

Plants simple, rarely branched. Inflorescences short racemes or racemelike to elongate corymbs. Calyces 12–18 mm, sometimes equal to or longer than corolla. Corollas rose, pink, pale-purple, or white with darker veins, glabrate or slightly glandular-pubescent; anthers tomentose or glabrous.


Phenology: Flowering Jun–Sep.
Habitat: Sandy soils and rocky slopes in open sagebrush communities.
Elevation: 300–3200 m.

Distribution

Alta., B.C., Man., Calif., Nev., N.Mex., Wyo.

Discussion

Populations of subsp. mutabilis are more abundant in the northern portion of the range; populations elsewhere appear to be somewhat isolated. The more elongated inflorescence seems to be the distinguishing character, although this is often difficult to determine. The corollas often display less pigmentation. Anthers vary from quite woolly in some populations to completely glabrous in other populations. This variation could be the result of geographic isolation or hybridization.

Selected References

None.

Lower Taxa

None.

reflexed +  and erect +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
glabrous +  and tomentose +
emarginate +  and truncate +
glandular-pubescent +
Acute (?) +, Rounded (?) +  and Obtuse (?) +
L. Turner Collins +, Alison E. L. Colwell +  and George Yatskievych +
Heckard +
enlarged +
Myzorrhiza corymbosa +
ovate;lanceolate +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
not leathery +, not +  and fleshy +
lanceolate +
burgundy +, yellow +, white +, pink +  and lavender +
divided +
1.2 cm12 mm <br />0.012 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
ovoid;oblong-ovoid +
0.5 cm5 mm <br />0.005 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
white +, pale-purple +, pink +  and rose +
glandular-pubescent +  and glabrate +
Bent (?) +  and Tubular (?) +
constricted +
1.8 cm18 mm <br />0.018 m <br /> (3.4 cm34 mm <br />0.034 m <br />) +
spikelike +
Alta. +, B.C. +, Man. +, Calif. +, Nev. +, N.Mex. +  and Wyo. +
300–3200 m. +
indehiscent +, septicidal +, loculicidal +  and dehiscence +
Sandy soils and rocky slopes in open sagebrush communities. +
white;purple;white;purple;pink;rose +
axillary +  and terminal +
glandular-pubescent +
racemelike +  and elongate +
deciduous +
white +  and more or less pink pale-purple +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
loosely ascending +  and recurved +
glandular-pubescent +
oblong +  and oblong-lanceolate +
subequal +
erose +  and entire +
lobed +, toothed +  and entire +
tenuinucellate +  and unitegmic +
campylotropous-like +
spikelike +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Flowering Jun–Sep. +
Canad. J. Bot. +
racemelike +  and elongate +
with short bifurcations +  and unbranched +
inconspicuous +
coralloid +
slender +
500 +  and 2000 +
prismatic +, ovoid +  and oblong-ellipsoid +
5 +  and 4 +
subequal +
yellow +  and white +
aerial +  and subterranean +
capitate +  and crateriform-peltate +
clavate +  and 2-4-lobed +
glandular-pubescent +
Aphyllon corymbosum subsp. mutabile +
Orobanche corymbosa subsp. mutabilis +
Orobanche corymbosa +
subspecies +
brick-red;white;grayish white pale-pink +
glabrate +  and glandular-pubescent +
constricted +
branched +  and simple +
perennial +  and annual +
holoparasitic +  and hemiparasitic +