Isocoma menziesii var. diabolica

G. L. Nesom

Phytologia 70: 96. 1991.

Treatment appears in FNA Volume 20. Treatment on page 443. Mentioned on page 442.

Stems strictly erect; herbage glabrous, usually stipitate-glandular, densely viscid, sometimes eglandular. Leaf-blades obovate to narrowly oblanceolate or narrowly elliptic-oblanceolate, 20–40 × 4–10 mm, not thick-fleshy, margins of at least the proximal shallowly serrate. Heads in corymbiform arrays. Corollas 6–7 mm. Cypselae (3.8–) 4.5–5 mm.


Phenology: Flowering Aug–Oct.
Habitat: Open slopes and cliffs, mostly in foothill woodlands
Elevation: 10–400 m

Discussion

Known only from San Benito and Santa Clara counties, var. diabolica occurs in primarily inland, montane habitats. Var. diabolica differs from var. vernonioides in its resinous, usually densely stipitate-glandular vestiture (villous hairs lacking or sparse along the stems), consistently reduced, somewhat bractlike distal cauline leaves, and longer corollas and cypselae.

Selected References

None.

Lower Taxa

None.

"thick" is not a number.

not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
Guy L. Nesom +
G. L. Nesom +
decurrent +
Pyrrocoma menziesii +
0.5 cm5 mm <br />0.005 m <br /> (4 cm40 mm <br />0.04 m <br />) +
obovate +  and spatulate or oblanceolate +
linear;oblanceolate or obovate +
rugulose +  and muricate +
not 2-lipped +  and actinomorphic +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.38 cm3.8 mm <br />0.0038 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
subterete +, terete +  and obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
10–400 m +
gland-dotted;gland-dotted +
sericeous +, tomentose +, glabrous +, villous +  and hispidulous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Open slopes and cliffs, mostly in foothill woodlands +
indeterminate +
heterogamous +  and homogamous +
stipitate-glandular +  and glabrous +
each +  and sessile +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
obconic;turbinate or campanulate +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
obovate;narrowly oblanceolate or narrowly elliptic-oblanceolate +
not thick-fleshy +
deltate +
dentate to pinnatifid +  and entire +
toothed +  and lobed +
2-carpellate +
persistent +
Flowering Aug–Oct. +
oblong +  and elliptic-lanceolate +
styliferous +, neuter +  and pistillate +
bearing subulate enations +, hairy +  and bristly +
concave;usually flat;conic +
exalbuminous +
eglandular +  and few-branched +
resinous +
gland-dotted +
stipitate-glandular +, tomentose +, villous +, hispidulous +  and glabrous +
appendaged +  and truncate +
papillate +  and smooth +
Haplopappus sect. Isocoma +
Isocoma menziesii var. diabolica +
Isocoma menziesii +
variety +
goblet--shaped +
ampliate +
dark orange-resinous +
120 cm1,200 mm <br />1.2 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
20 cm200 mm <br />0.2 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
120 cm1,200 mm <br />1.2 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +