Flora of North America species comparison

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Diplacus deschutesensis

Deschutes monkeyflower
Habit Herbs, annual.
Stems

erect to erect-ascending, 40–150 mm, distal internodes 1–2 mm, minutely glandular-puberulent.
Leaves

usually cauline, relatively even-sized or gradually larger distally;

petiole absent, proximal base short petiole-like;

blade broadly ovate or obovate to elliptic-ovate or elliptic-oblanceolate, 10–15(–25) × 4–13 mm, margins entire, plane, apex acuminate or cuspidate, surfaces glabrous or sparsely glandular-puberulent.
Pedicels

1–1.5 mm in fruit.
Flowers

usually from proximalmost to distal nodes, 2 per node, or 1 or 2 per node on 1 plant, chasmogamous.
Styles

puberulent, at least on distal 1/2.
Corollas

light pink to magenta or rose purple, usually with a darker narrow line extending from throat onto each lobe midvein, throat yellow, palate ridges yellow, tube-throat 8–12 mm, limb 10–16 mm diam., bilabiate.
Calyces

symmetrically attached to pedicels, not inflated in fruit, 7–8 mm, glandular-puberulent, lobes subequal, apex linear-acuminate, ribs green distally, intercostal areas whitish.
Capsules

7–9 mm.
Anthers

included, glabrous or sparsely hispidulous.
Stigmas

exserted, lobes subequal, abaxial slightly longer.
2n

= 16.

Diplacus deschutesensis
Phenology Flowering Jun–Aug.
Habitat Sandy and ashy soils, pumice sand and gravel, red clay slopes, hillsides, roadsides, bare areas, sagebrush, sagebrush-juniper, juniper, yellow pine and lodgepole pine forests.
Elevation 700–1500 m. (2300–4900 ft.)
Distribution
from FNA
OR
[WildflowerSearch map]
Discussion

Diplacus deschutesensis is endemic to Crook, Deschutes, Jefferson, Klamath, Lake, and Wheeler counties of central Oregon. D. M. Thompson (2005) regarded these plants as a zone of stabilized hybrids, intermediate between Mimulus cusickii and typical M. nanus, the range just outside and west of the wider range of typical M. cusickii. In an earlier study that included both of the latter species, W. L. Ezell (1971, and by annotation in 1987) identified the same set of plants simply as M. cusickii, not associating them at all with M. nanus. A. L. Grant (1924, and by annotation of MO collections) identified them variously as either M. cusickii or M. ovatus. Thompson did not say what features of intermediacy he observed in the putative hybrids, but he did note that they produced leaves with acuminate-cuspidate apices and that they would key to M. cusickii.

Leaves of Diplacus deschutesensis are broad with abruptly and sharply acuminate apices like those of D. cusickii, and the corolla coloration also is similar. The flowers (calyx length, corolla tube-throat length, limb width) and capsules of D. deschutesensis are considerably smaller, and the distal leaves are smaller with glabrous surfaces.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 440.
Parent taxa 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. 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
Name authority G. L. Nesom: Phytoneuron 2013-65: 8, fig. 5. (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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