Flora of North America species comparison

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Diplacus rattanii

Diplacus longiflorus

Rattan's monkeyflower

southern bush monkeyflower
Habit Herbs, annual. Subshrubs.
Stems

erect, 10–180(–230) mm, densely glandular-pubescent and viscid.

erect, 300–1000(–2000) mm, glandular-puberulent and short-villous.
Leaves

basal and cauline, basal in rosette, cauline gradually reduced distally;

petiole absent;

blade obovate to narrowly elliptic, 3–46(–70) × 1–20(–25) mm, margins entire or crenate, plane, apex rounded or obtuse, surfaces: proximals glabrate, distals glandular-pubescent and viscid.

usually cauline, relatively even-sized;

petiole absent;

blade elliptic to lanceolate, elliptic-lanceolate, or elliptic-oblanceolate, 25–65(–80) × 4–15(–25) mm, margins entire or serrate, revolute, apex acute to obtuse, abaxial surfaces densely hairy, hairs branched, adaxial glabrescent.
Pedicels

1–3(–6) mm in fruit.

5–16 mm in fruit.
Flowers

1 per node, chasmogamous.

2 per node, chasmogamous.
Styles

eglandular-puberulent.

minutely glandular.
Corollas

pink to magenta, throat floor with 3 dark purple lines meeting abaxial lip lobes, palate ridges yellow, tube-throat 7–10 mm, limb 4–7 mm diam., not bilabiate.

light orange to pale yellow-orange, palate ridges orangish, tube-throat 34–45 mm, limb (25–)28–40 mm diam., bilabiate, lobes oblong, apex of adaxial 2 each shallowly incised.
Calyces

symmetrically attached to pedicels, inflated in fruit, 5–10 mm, glandular-pubescent and viscid, lobes subequal, apex obtuse, often apiculate, ribs dark green to purplish, intercostal areas whitish.

not inflated in fruit, 22–32 mm, glandular-puberulent and short glandular-villous to hirsute-villous, tube slightly dilated distally, lobes unequal, apex acute, ribs green, intercostal areas light green.
Capsules

7–11(–12) mm.

18–28 mm.
Anthers

nearly exserted, glabrous.

included, glabrous.
Stigmas

nearly exserted, lobes unequal, abaxial 5–7 times adaxial.

included, lobes equal.
2n

= 16.

= 20.

Diplacus rattanii

Diplacus longiflorus
Phenology Flowering Apr–Jul. Flowering (Mar–)Apr–Jul.
Habitat Recently burned or cleared areas, sandhills, sandstone outcrops, sandy gravel and loam, decomposed granite, serpentine-derived soils, open chaparral, chaparral margins, open yellow pine-manzanita woodlands. Rocky hillsides and slopes, talus, chaparral, live oak woodlands.
Elevation 300–1300 m. (1000–4300 ft.) (50–)100–1300(–1800) m. ((200–)300–4300(–5900) ft.)
Distribution
from FNA
CA
[WildflowerSearch map]
from FNA
CA; Mexico (Baja California)
[WildflowerSearch map]
[BONAP county map]
Discussion

Diplacus rattanii occurs mostly in near-coastal localities from Glenn and Lake counties south to Ventura County.

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

Diplacus longiflorus occurs in southwestern California and northeastern Baja California.

Plants and populations intermediate between Diplacus longiflorus and D. puniceus are found where their ranges meet in Los Angeles, Orange, Riverside, and San Diego counties. The intermediate morphology and geography indicate that these are hybrids (as has been hypothesized by, for example, M. A. Streisfeld and J. R. Kohn 2005; D. M. Thompson 2005; M. C. Tulig and G. L. Nesom 2012), which have been identified as D. ×australis (McMinn ex Munz) Tulig. Streisfeld and Kohn found that in San Diego County, D. longiflorus and D. puniceus are discrete in morphology and separated in geography, with a narrow zone of hybrids and putative introgressants between.

Plants identified as Diplacus ×lompocensis McMinn (as species) occur where the geographic ranges of D. aurantiacus and D. longiflorus meet in Santa Barbara County and southern San Luis Obispo County; these plants have floral features intermediate between these two species. Stable populations of the putative hybrid are found throughout this region, although at either end of its distribution, the populations may more closely resemble the nearer parent. Considering that both D. aurantiacus and D. longiflorus are morphologically consistent across broad regions, D. ×lompocensis is perhaps best interpreted as a zone of introgression.

Diplacus ×australis and D. ×lompocensis are similar to D. longiflorus as well as to each other in most features; they are easily separated only by geographic range. Diplacus longiflorus is distinct from both in its larger corolla features and, frequently, calyx indument.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 432. FNA vol. 17, p. 450.
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. 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. 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. 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. 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 rattanii, M. rattanii subsp. decurtatus D. arachnoideus, D. glutinosus var. pubescens, Mimulus aurantiacus var. pubescens, M. longiflorus
Name authority (A. Gray) G. L. Nesom: Phytoneuron 2012-39: 29. (2012) Nuttall: Ann. Nat. Hist. 1: 139. (1838) — (as longiflora)
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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