Diplacus bolanderi

(A. Gray) G. L. Nesom

Phytoneuron 2012-39: 28. 2012.

Common names: Bolander’s monkeyflower
Endemic
Basionyms: Mimulus bolanderi A. Gray Proc. Amer. Acad. Arts 7: 381. 1868
Synonyms: M. platylaemus Pennell
Treatment appears in FNA Volume 17. Treatment on page 434. Mentioned on page 428, 430.

Herbs, annual. Stems erect, 20–900 (–1200) mm, usually glandular-pubescent and viscid. Leaves basal and cauline, basal in rosette, cauline gradually reduced distally; petiole present proximally, usually absent distally; blade ovate, obovate, elliptic, or oblanceolate, 5–60 (–85) × 1.5–25 (–32) mm, margins entire or largest irregularly serrate, plane, apex rounded to obtuse, surfaces: proximals nearly glabrous, distals glandular-pubescent. Pedicels 2–5 (–8) mm in fruit. Flowers 2 per node, or 1 or 2 per node on 1 plant (1 per node on depauperate plants), chasmogamous. Calyces symmetrically attached to pedicels, inflated in fruit, (7–) 9–25 (–27) mm, glandular-pubescent and viscid, lobes often spreading in fruit, unequal if calyx large, apex acute to attenuate, ribs prominent, purplish, intercostal areas white. Corollas magenta, throat often darkening near floor, without dark spots, palate ridges or floor white, usually magenta-speckled, tube-throat 10–30 mm, limb 6–20 mm diam., not bilabiate. Anthers included, glabrous. Styles glandular-puberulent. Stigmas exserted, lobes unequal, abaxial 2–3 times adaxial. Capsules 8–20 mm. 2n = 16.


Phenology: Flowering Apr–Jul.
Habitat: Granite outcrops, slopes with decomposed granite soils.
Elevation: (100–)300–1700(–2000) m.

Discussion

Diplacus bolanderi is scattered and uncommon through most of California (with concentrations in the southern North Coast Ranges and Central Sierra) and apparently is disjunct in Jackson County, Oregon.

Diplacus bolanderi is highly variable in height, leaf size, corolla size, and calyx size. Identity is unmistakable in larger plants; the inflated calyx with lobes strongly unequal in length usually is helpful in identification of smaller plants.

Selected References

None.

Lower Taxa

None.

... more about "Diplacus bolanderi"
2-3 times adaxial lobes +
Acute (?) +  and Attenuate (?) +
Guy L. Nesom +  and Melissa C. Tulig +
(A. Gray) G. L. Nesom +
Mimulus bolanderi +
6 cm60 mm <br />0.06 m <br /> (8.5 cm85 mm <br />0.085 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (3.2 cm32 mm <br />0.032 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (6 cm60 mm <br />0.06 m <br />) +
oblanceolate;elliptic;oblanceolate;elliptic;obovate;ovate +
not +, leathery +  and not fleshy +
1.5mm;25mm +
2.5 cm25 mm <br />0.025 m <br /> (2.7 cm27 mm <br />0.027 m <br />) +
glandular-pubescent +
inflated +
0.9 cm9 mm <br />0.009 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Bolander’s monkeyflower +
not +, rarely radially symmetric +  and weakly strongly bilabiate +
glandular-pubescent +
Calif. +  and Oreg. +
(100–)300–1700(–2000) m. +
hairy +  and glabrous +
reflexed;nodding;erect +
reduced +
compressed;asymmetrically ovoid;lanceoloid or nearly cylindric +
Granite outcrops, slopes with decomposed granite soils. +
gland-tipped +
alternate +, opposite +, rosulate +  and subrosulate +
persistent +  and deciduous +
cauline +  and basal +
not bilabiate +
0.6 cm6 mm <br />0.006 m <br /> (2 cm20 mm <br />0.02 m <br />) +
triangular;deltate +
unequal +
palmate +  and subpinnate +
plane +, serrate +, largest +  and entire +
wing-angled +  and angled +
2 +  and 1 +
chasmogamous +
basal +  and superior +
tenuinucellate +  and unitegmic +
orthotropous +  and anatropous +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
rarely more or less equal to or slightly longer +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering Apr–Jul. +
Phytoneuron +
prominent +
flattened +, ovoid +  and oblong +
deciduous +
2 cm20 mm <br />0.02 m <br /> (90 cm900 mm <br />0.9 m <br />) +
glandular-puberulent +
M. platylaemus +
Diplacus bolanderi +
Diplacus +
species +
magenta-speckled +  and white +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
10 +, 9 +  and 8 +