Flora of North America species comparison

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Diplacus johnstonii

Diplacus cascadensis

Johnston's monkeyflower

Cascade monkeyflower, Cascades monkeyflower
Habit Herbs, annual. Herbs, annual.
Stems

erect, (10–)30–200(–300) mm, densely glandular-puberulent.

erect to ascending-erect, 20–100 mm, distal internodes 1–4 mm, short glandular-villous to glandular-puberulent.
Leaves

basal and cauline, gradually reduced distally;

petiole absent, bases of larger leaves often with petiole-like extensions;

blade obovate or oblanceolate, sometimes elliptic, (4.5–)7–25(–32) × 2–12(–15) mm, margins entire, plane, apex rounded to acute, surfaces densely glandular-puberulent.

usually cauline, relatively even-sized;

petiole present proximally, absent distally;

blade elliptic-spatulate to obovate or broadly oblanceolate, 10–22 × 2–10 mm, margins entire, plane, apex obtuse to rounded-acute, surfaces minutely glandular-puberulent.
Pedicels

1–4(–5) mm in fruit.

1–3 mm in fruit.
Flowers

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

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

densely glandular-puberulent distally.

apparently glabrous.
Corollas

magenta, darker and more reddish in throat and, often, along narrow radiating lines extending from throat onto midveins of lobes, throat usually with a large dark spot on each side of mouth on lateral walls, palate ridges and throat floor yellow with reddish spots, tube-throat 9–15 mm, limb 10–15 mm diam., not bilabiate.

magenta to purplish, usually with a darker narrow line extending from throat onto each lobe midvein, palate ridges yellow with red spots, throat floor glabrous, tube 1.1–1.9 mm diam. at filament insertion, tube-throat 8–10 mm, limb 7–11 mm diam., bilabiate.
Calyces

symmetrically attached to pedicels, not inflated in fruit, (6–)7–11 mm, glandular-puberulent, lobes unequal, apex acute to acuminate, ribs inconspicuous, intercostal areas reddish.

symmetrically attached to pedicels, not inflated in fruit, (4–)5–7 mm, minutely glandular-puberulent, lobes subequal, apex acute to acuminate, ribs dark green or reddish, intercostal areas whitish.
Capsules

7–12 mm.

5–8(–9) mm.
Anthers

included, glabrous.

(distal pair) exserted, minutely viscid-villosulous.
Stigmas

exserted or at opening of corolla tube-throat, lobes equal.

exserted, lobes usually subequal.
2n

= 16.

= 16.

Diplacus johnstonii

Diplacus cascadensis
Phenology Flowering May–Aug. Flowering Jun–Aug.
Habitat Steep, unstable scree slides, talus slopes, gravel slides, cracks in granite cliffs, ridges, washes, steep sand and gravel slopes, canyon bottoms, gravelly road banks, recent burns, desert scrub, chaparral, juniper, pinyon-juniper, lodgepole pine, yellow pine, Jeffrey pine, and Jeffrey pine-western white pine-fir woodlands. Open pumice flats, scree slopes, sandy soils, juniper-sagebrush, juniper, pine-juniper, yellow pine, lodgepole pine forests.
Elevation (1000–)1300–2900 m. ((3300–)4300–9500 ft.) 1400–2400(–2600) m. (4600–7900(–8500) ft.)
Distribution
from FNA
CA
[WildflowerSearch map]
from FNA
OR
Discussion

Populations of Diplacus johnstonii occur in Los Angeles, Riverside, San Bernardino, Santa Barbara, and Ventura counties. The populations in northwestern Los Angeles, Santa Barbara, and Ventura counties were noted by D. M. Thompson (2005) to be intermediate between D. constrictus and D. johnstonii.

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

Diplacus cascadensis is known from Deschutes, Klamath, and Lake counties. Plants of this species have been identified as D. nanus (similar in its purplish leaves congested on crowded distal nodes, minutely glandular-puberulent vestiture, and purplish and strongly bilabiate corollas), but they differ from D. nanus in their broader distal leaves, shorter calyces, shorter corollas with glabrous throats and magenta tubes, and shorter capsules.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 433. FNA vol. 17, p. 441.
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. graniticola, D. jepsonii, 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. calycinus, 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 Mimulus johnstonii
Name authority (A. L. Grant) G. L. Nesom: Phytoneuron 2012-39: 29. (2012) G. L. Nesom: Phytoneuron 2013-65: 13, figs. 8, 9. (2013)
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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