Flora of North America species comparison

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Diplacus graniticola

Diplacus calycinus

granite-crack monkeyflower

Kaweah River bush monkeyflower, rock bush monkeyflower
Habit Herbs, annual, herbage usually drying dark. Subshrubs.
Stems

erect, 60–120(–150) mm, nodes 4–15(–20), internodes shorter than leaves, glandular-villous with gland-tipped hairs 1–1.6 mm.

erect, 150–1500 mm, glandular-pubescent to viscid-villous.
Leaves

usually cauline, relatively even-sized;

petiole weakly delimited;

blade usually lanceolate to ovate-lanceolate, 20–40 × 4–12 mm, margins entire, rarely toothed, plane, apex rounded to obtuse or acute, surfaces: proximals often glabrate abaxially, distals glandular-villous.

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

1–3 mm in fruit.

3–5 mm in fruit.
Flowers

2 per node, or 1 or 2 per node on 1 plant, chasmogamous.

2 per node, chasmogamous.
Styles

glandular-puberulent.

minutely glandular.
Corollas

nearly white or pale lavender to pinkish or pale to dark magenta, each lobe with a dark medial line extending nearly to tip, throat with a dark red or purple splotch at junction of each abaxial lobe and adjacent lateral lobe, throat floor sometimes with 2 adjacent white splotches at lateral lobe bases, palate ridges yellow, tube-throat 15–20 mm, limb 10–16 mm diam., bilabiate.

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.
Calyces

symmetrically attached to pedicels, not inflated in fruit, 8–12 mm, glandular-villous, tube strongly plicate, lobes triangular, subequal, apex acute, ribs narrow, darkened, blackish, thickened, strongly raised, intercostal areas green to purple, not membranous.

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.
Capsules

6–10 mm.

25–35 mm.
Anthers

included, ciliate.

exserted, glabrous.
Stigmas

included, lobes unequal, abaxial 1.5 times adaxial.

exserted, lobes equal.
2n

= 16.

= 20.

Diplacus graniticola

Diplacus calycinus
Phenology Flowering Apr–Sep. Flowering Apr–Jul.
Habitat Granite cracks and crevices. Granite outcrops, boulders, rocky gullies.
Elevation 300–2100 m. (1000–6900 ft.) (300–)700–2200 m. ((1000–)2300–7200 ft.)
Distribution
from FNA
CA
[WildflowerSearch map]
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

Diplacus graniticola occurs in the Sierra Nevada from Tuolumne County to northern Tulare County. These plants previously were identified within D. layneae, with which they are partially sympatric; where these two occur together, D. layneae often grows in granite-derived sand and gravel immediately adjacent to the granite rock habitat of D. graniticola.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

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.)
Source FNA vol. 17, p. 438. FNA vol. 17, p. 449.
Parent taxa Phrymaceae > Diplacus Phrymaceae > Diplacus
Sibling taxa
D. angustatus, D. aridus, D. aurantiacus, D. bicolor, D. bigelovii, D. bolanderi, D. brandegeei, D. brevipes, D. calycinus, D. cascadensis, D. clevelandii, D. clivicola, D. compactus, D. congdonii, D. constrictus, D. cusickii, D. cusickioides, D. deschutesensis, D. douglasii, D. fremontii, D. grandiflorus, D. jepsonii, D. johnstonii, D. kelloggii, D. layneae, D. leptaleus, D. linearis, D. longiflorus, D. mephiticus, D. mohavensis, D. nanus, D. ovatus, D. parryi, D. parviflorus, D. pictus, D. pulchellus, D. puniceus, D. pygmaeus, D. rattanii, D. rupicola, D. rutilus, D. thompsonii, D. torreyi, D. traskiae, D. tricolor, D. vandenbergensis, D. viscidus
D. angustatus, D. aridus, D. aurantiacus, D. bicolor, D. bigelovii, D. bolanderi, D. brandegeei, D. brevipes, D. cascadensis, D. clevelandii, D. clivicola, D. compactus, D. congdonii, D. constrictus, D. cusickii, D. cusickioides, D. deschutesensis, D. douglasii, D. fremontii, D. grandiflorus, D. graniticola, D. jepsonii, D. johnstonii, D. kelloggii, D. layneae, D. leptaleus, D. linearis, D. longiflorus, D. mephiticus, D. mohavensis, D. nanus, D. ovatus, D. parryi, D. parviflorus, D. pictus, D. pulchellus, D. puniceus, D. pygmaeus, D. rattanii, D. rupicola, D. rutilus, D. thompsonii, D. torreyi, D. traskiae, D. tricolor, D. vandenbergensis, D. viscidus
Synonyms D. longiflorus var. calycinus, Mimulus longiflorus subsp. calycinus, M. longiflorus var. calycinus
Name authority Schoenig: Phytoneuron 2017-24: 1, figs. 1, 3–10. (2017) Eastwood: Bot. Gaz. 41: 287. (1906)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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