Diplacus calycinus

Eastwood

Bot. Gaz. 41: 287. 1906.

Common names: Rock bush monkeyflower
Endemic
Synonyms: Diplacus longiflorus var. calycinus (Eastwood) Jepson Mimulus longiflorus subsp. calycinus (Eastwood) Munz M. longiflorus var. calycinus (Eastwood) A. L. Grant
Treatment appears in FNA Volume 17. Treatment on page 449. Mentioned on page 428, 450.

Subshrubs. Stems erect, 150–1500 mm, glandular-pubescent to viscid-villous. Leaves cauline, relatively even-sized; petiole absent; blade elliptic-lanceolate or lanceolate to narrowly lanceolate or linear-lanceolate, sometimes narrowly oblong, 20–75 (–100) × 4–20 (–28) mm, margins entire or shallowly crenate, plane or revolute, apex acute to obtuse, abaxial surfaces moderately villous, hairs unbranched, vitreous, adaxial glabrous. Pedicels 3–5 mm in fruit. Flowers 2 per node, chasmogamous. Calyces not inflated in fruit, 28–40 mm, densely glandular-pubescent to short glandular-villous, tube slightly dilated distally, lobes unequal, apex acute, ribs green, intercostal areas light green. Corollas usually pale-yellow or cream to yellow, not spotted or striped, palate ridges yellow to golden yellow, tube-throat 35–42 mm, limb 20–30 mm diam., bilabiate, lobes oblong, apex of adaxial 2 each shallowly, asymmetrically incised. Anthers exserted, glabrous. Styles minutely glandular. Stigmas exserted, lobes equal. Capsules 25–35 mm. 2n = 20.


Phenology: Flowering Apr–Jul.
Habitat: Granite outcrops, boulders, rocky gullies.
Elevation: (300–)700–2200 m.

Discussion

Although first described as a separate species, Diplacus calycinus has more recently been treated at subspecific or varietal rank (A. L. Grant 1924; F. W. Pennell 1951; P. A. Munz and D. D. Keck 1973). D. M. Thompson (2005) included both D. calycinus and D. longiflorus within his concept of Mimulus aurantiacus var. pubescens (Torrey) D. M. Thompson. He did not reference the study of sect. Diplacus by M. C. Tulig (2000), but results from the Tulig morphometric analyses indicated that D. calycinus is distinct from D. longiflorus, especially in corolla length, corolla tube length, and style length.

The type of Diplacus calycinus is from Tulare County, and the concept of the species is perhaps best restricted to the Sierran population system in Fresno, Kern, and Tulare counties, disjunct from D. longiflorus, which occurs primarily in coastal counties. The Sierran system is characterized by distinct abaxial leaf vestiture; the hairs are unbranched, broad, and vitreous, compared to the branched, thinner, and dull hairs of D. longiflorus. Plants of D. calycinus parapatric with D. longiflorus also show a tendency toward the characteristic vestiture and also have lighter-colored (but more variable in color) corollas with narrower but slightly shorter tubes. Intergradation between D. calycinus and D. longiflorus occurs in the region connecting the San Bernardino and San Gabriel mountains in San Bernardino County.

Selected References

None.

Lower Taxa

None.
... more about "Diplacus calycinus"
Incised (?) +, Acute (?) +  and Obtuse (?) +
Guy L. Nesom +  and Melissa C. Tulig +
Eastwood +
7.5 cm75 mm <br />0.075 m <br /> (10 cm100 mm <br />0.1 m <br />) +
2 cm20 mm <br />0.02 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
2 cm20 mm <br />0.02 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
oblong;lanceolate;narrowly lanceolate or linear-lanceolate +
? (?) +, ? (?) +  and ? (?) +
4mm;20mm +
densely glandular-pubescent +  and short glandular-villous +
not inflated +
2.8 cm28 mm <br />0.028 m <br /> (4 cm40 mm <br />0.04 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Rock bush monkeyflower +
not +, rarely radially symmetric +  and weakly strongly bilabiate +
cream;yellow not spotted or striped +
(300–)700–2200 m. +
hairy +  and glabrous +
reflexed;nodding;erect +
reduced +
compressed;asymmetrically ovoid;lanceoloid or nearly cylindric +
Granite outcrops, boulders, rocky gullies. +
alternate +, opposite +, rosulate +  and subrosulate +
persistent +  and deciduous +
equal-sized +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
unequal +
palmate +  and subpinnate +
revolute +, plane +, crenate +  and entire +
wing-angled +  and angled +
basal +  and superior +
tenuinucellate +  and unitegmic +
orthotropous +  and anatropous +
yellow +  and golden yellow +
rarely more or less equal to or slightly longer +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering Apr–Jul. +
flattened +, ovoid +  and oblong +
deciduous +
15 cm150 mm <br />0.15 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
Diplacus longiflorus var. calycinus +, Mimulus longiflorus subsp. calycinus +  and M. longiflorus var. calycinus +
Diplacus calycinus +
Diplacus +
species +
3.5 cm35 mm <br />0.035 m <br /> (4.2 cm42 mm <br />0.042 m <br />) +
dilated +
perennial +  and annual +
10 +, 9 +  and 8 +