Erythranthe unimaculata

(Pennell) G. L. Nesom

Phytoneuron 2012-39: 44. 2012.

Common names: Green-palate monkeyflower
Basionyms: Mimulus unimaculatus Pennell Notul. Nat. Acad. Nat. Sci. Philadelphia 43: 5. 1940
Treatment appears in FNA Volume 17. Treatment on page 413. Mentioned on page 375, 414.

Annuals, shallowly fibrous-rooted or slender-taprooted, sometimes rooting at proximal nodes. Stems erect or basally ascending-erect, simple or few-branched, becoming fistulose in larger plants, (2–) 10–30 (–100) cm, delicately short glandular-villous to stipitate-glandular, often glabrous below inflorescence. Leaves usually cauline, basal sometimes persistent, distal connate-perfoliate, often bractlike; petiole: proximals 4–10 (–15) mm, distals 0 mm; blade: proximals sometimes subpinnately veined, usually with (1 or) 2 pairs arising from midvein above base, becoming palmately veined distally, ovatelanceolate to ovate or broadly ovate-elliptic, mid cauline 12–40 (–50) × 10–25 (–45) mm, base rounded to truncate or cuneate, margins shallowly dentate-serrate to serrate, teeth 7–12 per side, apex rounded to obtuse, surfaces glabrous, sometimes with sharp-pointed hirtellous, vitreous-flattened, or gland-tipped hairs. Flowers herkogamous, (1–) 3–14, usually from mid-stem and distally, chasmogamous. Fruiting pedicels 10–40 mm, delicately short glandular-villous to stipitate-glandular, often glabrous below inflorescence. Fruiting calyces nodding 30–90º, broadly campanulate, inflated, sagittally compressed, 9–13 (–15) mm, sparsely glandular-villous to stipitate-glandular, throat closing, adaxial lobe distinctly longer. Corollas pale-yellow, palate and abaxial throat dark yellow, drying blue-green, red-spotted, bilaterally symmetric, bilabiate; tube-throat funnelform to subfunnelform, (7–) 9–14 mm, exserted 3–4 mm beyond calyx margin; limb broadly expanded (8–17 mm pressed), palate densely bearded. Styles hirtellous. Anthers included, glabrous. Capsules included, 5–8 mm. 2n = 28.


Phenology: Flowering Jan–Jun.
Habitat: Stream and canal sides, pool edges, canyon bottoms, sand, gravel, and mud, riparian habitats, pine-oak forests.
Elevation: 200–2000 m.

Distribution

Ariz., N.Mex., Mexico (Chihuahua), Mexico (Sonora)

Discussion

Erythranthe unimaculata is recognized by its annual duration (fibrous-rooted, without stolons or rhizomes), delicate-glandular vestiture, mostly sessile to subsessile, often widely spaced leaves, closed fruiting calyces, and relatively large, pale yellow to nearly white corollas with a dark yellow palate that commonly dries blue-green. The breeding system is allogamous. Plants commonly are single-stemmed and usually erect but sometimes produce decumbent-ascending stems branching from the base, these sometimes rooting at proximal nodes.

Erythranthe unimaculata is known from Cochise, Gila, Pima, and Santa Cruz counties, Arizona, and from Doña Ana County, New Mexico.

Selected References

None.

Lower Taxa

None.

... more about "Erythranthe unimaculata"
loculicidal +
Rounded (?) +  and Obtuse (?) +
Guy L. Nesom +  and Naomi S. Fraga +
(Pennell) G. L. Nesom +
rosulate +  and subrosulate +
not persistent +
rounded;truncate or cuneate +
Mimulus unimaculatus +
not leathery +  and semifleshy +
compressed +, inflated +  and tubular +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Green-palate monkeyflower +
regular +  and bilabiate +
connate-perfoliate +
Ariz. +, N.Mex. +, Mexico (Chihuahua) +  and Mexico (Sonora) +
200–2000 m. +
hairy +  and glabrous +
nodding;spreading;nodding;spreading;erect +
reduced +
Stream and canal sides, pool edges, canyon bottoms, sand, gravel, and mud, riparian habitats, pine-oak forests. +
gland-tipped +
hirtellous +
vitreous-flattened +  and sharp-pointed +
glabrous +, glandular-villous +  and stipitate-glandular +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
alternate +, opposite +, rosulate +  and subrosulate +
persistent +  and deciduous +
expanded +
3 +  and not 5 +
mostly triangular;deltate +
reduced +  and longer +
subentire +  and toothed +
dentate-serrate to serrate +
basal +  and superior +
tenuinucellate +  and unitegmic +
orthotropous +  and anatropous +
red-spotted +, blue-green +  and dark yellow +
Flowering Jan–Jun. +
4 cm40 mm <br />0.04 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (4 cm40 mm <br />0.04 m <br />) +
cauline +  and mid +
ovatelanceolate;ovate or broadly ovate-elliptic +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Phytoneuron +
flattened +  and ellipsoid +
3 +  and 5 +
proximal +  and middle +
few-branched +  and simple +
ascending-erect;erect +
fistulose +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
Mimulus sect. Erythranthe +  and Mimulus subg. Synplacus +
Erythranthe unimaculata +
Erythranthe +
species +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
subfunnelform +
rooting +, slender-taprooted +  and fibrous-rooted +
1.3 cm13 mm <br />0.013 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
sparsely glandular-villous +  and stipitate-glandular +
compressed +, inflated +  and campanulate +
0.9 cm9 mm <br />0.009 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
perennial +  and annual +
herb +  and subshrub +
terrestrial +  and aquatic +
semiaquatic +  and terrestrial +
9 +, 8 +  and 7 +