Diplacus calycinus
Diplacus aridus
Kaweah River bush monkeyflower, rock bush monkeyflower
low bush monkeyflower, San Diego bush monkeyflower
erect, 150–1500 mm, glandular-pubescent to viscid-villous.
erect, 80–330 mm, glabrous.
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.
cauline, relatively even-sized;
petiole absent or short;
blade narrowly ovate to elliptic-lanceolate, elliptic, or oblanceolate, 20–50 × 3–15 mm, margins dentate to serrate, plane or revolute, apex obtuse to acute, surfaces glabrous.
3–5 mm in fruit.
3–10 mm in fruit.
2 per node, chasmogamous.
2 per node, chasmogamous.
minutely glandular.
minutely glandular.
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.
pale yellow to cream or nearly white, pale orange, golden yellow, or orange-yellow, not spotted or striped, palate ridges golden yellow, throat internally glabrous, tube-throat 37–52 mm, limb 15–22 mm diam., not bilabiate, lobes entire.
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.
inflated in fruit, 35–40 mm, glabrous, tube distinctly dilated distally, lobes subequal, apex acute, ribs green, intercostal areas light green.
25–35 mm.
20–36 mm.
exserted, glabrous.
exserted (at throat), glabrous.
exserted, lobes equal.
exserted, lobes equal.
= 20.
= 20.
Diplacus calycinus
Diplacus aridus
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.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Diplacus aridus is known from Imperial and San Diego counties.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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