Orobanche valida subsp. howellii
Madroño 29: 98, fig. 1A–E. 1982.
Common names: Howell’s broomrape
Endemic
Synonyms: Aphyllon validum subsp. howellii (Heckard & L. T. Collins) A. C. Schneider
Plants (6–) 10–20 cm, base often slightly enlarged. Bracts, bracteoles, and calyces densely glandular-pilose, hairs 0.2–0.4 mm. Corollas 14–16 (–18) mm; palatal folds puberulent; lips and tube densely glandular-pilose throughout, hairs 0.4–0.7 mm; filaments sparsely pilose at base, anthers pilose. 2n = 48.
Phenology: Flowering Jun–Sep.
Habitat: Rocky volcanic, serpentine slopes, open chaparral.
Elevation: 1200–1700 m.
Discussion
Subspecies howellii is restricted to Glenn, Lake, Mendocino, Napa, and Tehama counties in the northern and central Coast Ranges, geographically disjunct from subsp. valida. The confirmed hosts are species of Garrya. Reports of Eriodictyon and Quercus as hosts need confirmation. Further research on this rare subspecies is warranted to establish its range and conservation status.
Selected References
None.
Lower Taxa
None.
... more about "Orobanche valida subsp. howellii"
spreading +
gray +
hypogynous +
included +
pilose +
glandular-pubescent +
ovate +
absent +
absent +
few +
symmetric +
dark purple +
glandular-pilose +
divided +
loculicidal +
narrowly ovoid;oblong-ovoid +
Howell’s broomrape +
bilabiate +
curved +
constricted +
spikelike +
Calif. +
straight +
absent +
pilose +
fascicles +
numerous +
bisexual +
pale-yellow;white +
absent +
prominent +
puberulent +
few +
simple +
dark purple;creamy white +
simple +
imbricate +
spiral +
deciduous +
erect +
cauline +
absent +
dark purple +
glandular-pilose +
glandular-pubescent +
parietal +
parietal +
superior +
anatropous +
campylotropous-like +
spikelike +
much shorter +
absent +
hypogynous +
connate +
absent +
2-carpellate +
Madroño +
1982 +
spikelike +
inconspicuous +
coralloid +
black;tan;dark-brown +
connate +
Endemic +
didynamous +
adnate +
included +
subequal +
equal +
absent +
purple +
erect +
fleshy +
absent +
rhizomelike +
cormlike +
underground +
vegetative +
glabrous +
Orobanche valida subsp. howellii +
Orobanche valida +
subspecies +
yellow;white +
glandular-pilose +
bent +
purple +
slender +
fleshy +
absent +