Diplacus aurantiacus |
Diplacus longiflorus |
|
---|---|---|
bush monkeyflower, orange bush monkey-flower, red bush monkeyflower, sticky monkey-flower |
southern bush monkeyflower |
|
Habit | Subshrubs or shrubs. | Subshrubs. |
Stems | erect to ascending, 500–1200(–1500) mm, minutely hirtellous-hirsutulous and minutely stipitate-glandular. |
erect, 300–1000(–2000) mm, glandular-puberulent and short-villous. |
Leaves | usually cauline, relatively even-sized; petiole absent or indistinct; blade narrowly oblong to narrowly elliptic-lanceolate proximally to lanceolate to elliptic-lanceolate or elliptic distally, 15–60(–75) × 2–20 mm, margins entire or shallowly serrate, plane or revolute, apex obtuse to rounded, surfaces glabrous or abaxial sparsely to densely hairy, hairs branched, adaxial usually without unbranched hairs. |
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 | 4–13 mm in fruit. |
5–16 mm in fruit. |
Flowers | 2(–4) per node, chasmogamous. |
2 per node, chasmogamous. |
Styles | sparsely glandular. |
minutely glandular. |
Corollas | yellow-orange to orange, not spotted or striped, palate ridges yellow to golden yellow or orange, tube-throat 25–30 mm, limb 20–30 mm diam., bilabiate to nearly rotate, lobes oblong, apex of adaxial 2 each shallowly, asymmetrically incised. |
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 | not inflated in fruit, 18–30 mm, glabrous or minutely hirtellous and/or minutely stipitate-glandular, tube slightly dilated distally, lobes subequal to unequal, apex acute, ribs green, intercostal areas light green. |
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 | 18–31 mm. |
18–28 mm. |
Anthers | exserted (at throat), glabrous. |
included, glabrous. |
Stigmas | exserted, lobes equal. |
included, lobes equal. |
2n | = 20. |
= 20. |
Diplacus aurantiacus |
Diplacus longiflorus |
|
Phenology | Flowering Apr–Aug. | Flowering (Mar–)Apr–Jul. |
Habitat | Sand dunes and bluffs, dry hillsides, grassy slopes, road banks, stream banks, basaltic knolls, rocky slopes and outcrops, open pine forests, coastal scrub. | Rocky hillsides and slopes, talus, chaparral, live oak woodlands. |
Elevation | 0–700(–1000) m. (0–2300(–3300) ft.) | (50–)100–1300(–1800) m. ((200–)300–4300(–5900) ft.) |
Distribution |
CA; OR
|
CA; Mexico (Baja California)
|
Discussion | Diplacus aurantiacus occurs from southwestern Oregon (Curry County) southward to Santa Barbara County, California. (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. 449. | FNA vol. 17, p. 450. |
Parent taxa | Phrymaceae > Diplacus | Phrymaceae > Diplacus |
Sibling taxa | ||
Synonyms | Mimulus aurantiacus, D. glutinosus, D. glutinosus var. aurantiacus, M. glutinosus | D. arachnoideus, D. glutinosus var. pubescens, Mimulus aurantiacus var. pubescens, M. longiflorus |
Name authority | (Curtis) Jepson: Man. Fl. Pl. Calif., 919. (1925) | Nuttall: Ann. Nat. Hist. 1: 139. (1838) — (as longiflora) |
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