Salix ×jesupii

Fernald
Treatment appears in FNA Volume 7. Treatment on page 43. Mentioned on page 39, 42.

Salix ×jesupii Fernald: S. alba × S. lucida; S. ×ehrhartiana of authors, not G. Meyer. The origin of this hybrid, between a European and a native species, unknown. It characterized by: shrubs or trees, 7–10 m; branchlets redbrown; petioles convex to shallowly grooved adaxially, 3–11 mm, with pairs or clusters of spherical or stalked glands distally; largest medial leaf-blade amphistomatous or hemiamphistomatous, abaxial surface glaucous, sparsely long-silky to glabrescent, hairs white and ferruginous; floral bract apex acute to rounded, toothed or entire; pistillate flowering branchlet 8–16 mm, bract deciduous after flowering; stamens 3–5; stipes 0.3–0.6 mm; ovary pyriform, glabrous; ovules 12–14 per ovary; styles 0.3–0.8 mm; capsules 4–5 mm.


Phenology: Flowering late April–mid May.
Habitat: Edges of streams and lakes, in wet deciduous woods, sand dunes, and wet railroad rights-of-way.
Elevation: 10–300m

Distribution

Ont., Que., P.E.I., Sask., Ill., Ky., Mass., N.H., N.Y., Ohio, Pa., Vt., Va., Wash., W.Va., Wis. It is possibly in Wash

Discussion

Salix ×jesupii was named by M. S. Bebb (1895) as a formula hybrid, S. alba × S. lucida, and Fernald based his binomial on Bebb’s exsiccatae. In North America, it was mistaken for the European S. ×ehrhartiana G. Meyer (S. alba Linnaeus × S. pentandra Linnaeus) (G. W. Argus 1986). Study of nectary morphology confirmed that the North American plants were not the same as the European hybrid. In herbaria, plants of S. ×jesupii often are misidentified as S. alba, S. euxina, S. ×fragilis, or S. lucida.

Selected References

None.

Lower Taxa

None.

... more about "Salix ×jesupii"
sparsely long-silky +  and glabrescent +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
reddish turning yellow +  and yellow +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
Acuminate (?) +  and Acute (?) +
George W. Argus +
Fernald +
tapering +
ferruginous +  and white +
long-silky +, pubescent +  and glabrous +
acute +  and rounded toothed or entire +
deciduous +
pliable +  and brittle +
not glaucous +
subglobose +
slender +  and stout +
0.8 cm8 mm <br />0.008 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
pistillate +  and staminate +
pendulous +, spreading +  and erect +
Ont. +, Que. +, P.E.I. +, Sask. +, Ill. +, Ky. +, Mass. +, N.H. +, N.Y. +, Ohio +, Pa. +, Vt. +, Va. +, Wash. +, W.Va. +  and Wis. It is possibly in Wash +
10–300m +
connate +  and distinct +
glabrous +  and hairy +
greenish +  and tawny +
pistillate +  and staminate +
bisexual +  and unisexual +
spherical +
Edges of streams and lakes, in wet deciduous woods, sand dunes, and wet railroad rights-of-way. +
white and ferruginous +
unbranched +  and spicate +
subterminal +  and axillary +
membranaceous +
hypostomatous +  and amphistomatous +
oblanceolate +, ovate +, lanceolate +, elliptic +, oblong +  and lorate +
hemiamphistomatous +  and amphistomatous +
arranged +  and alternate +
marcescent +
deciduous +
rudimentary +
2-7[-10]-carpellate +
pyriform +
glandular-dotted +
Flowering late April–mid May. +
Sp. Pl. +  and Gen. Pl. ed. +
1753 +  and 1754 +
overlapping +
distinct +
branched +, sympodial +, monopodial +  and branching +
non-papillate +
cylindrical +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
caducous +  and persistent +
distinct +  and connate +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
persistent +  and deciduous +
ferruginous +  and white +
Salix ×jesupii +
Salix sect. Salix +
species +
rounded +
acute;rounded toothed or entire +
0.3 cm3 mm <br />0.003 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
sympodial +, branching +  and heterophyllous +